Weekly Field Update – 11/22/21

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Coastal Region

Rob Last reports, “Crops are continuing to develop well with few insect or disease problems to press. The disease pressure may increase given the welcome rainfall forecast today. Please remember to scout regularly and thoroughly. Problems caught early are easier to manage.”

Midlands

Justin Ballew reports, “We enjoyed the beautiful fall weather last week. Growers are harvesting lots of brassicas right now. Thanksgiving is a big time for collard sales, so folks are going to be busy over the next few days. Most brassicas look great. We haven’t had much rain this fall, so disease is very low. Caterpillar pressure is high in some places. Just a reminder, diamondback moths can develop insecticide resistance very quickly. Monitor population levels closely and always base treatment decisions on thresholds. Do not spray just because it’s been 7 days since the last application. Make sure the population level justifies the application. Also, avoid spraying the same material twice within a 30 day period and NEVER use a pyrethroid or organophosphate when caterpillars are the only pests present.”

Insecticide resistance to multiple modes of action has allowed the diamondback moth population in this field to cause severe damage. Multiple pyrethroid and organophosphate applications have also wiped out beneficial insects. It is unlikely a field like this can recover. Photo from Justin Ballew.

Phillip Carnley reports, “Just like much, if not all the state, it has been exceptionally dry in Orangeburg and Calhoun counties. Despite that, crops are looking good and growing well. Strawberries here are a little behind like much of the state due to late planting, but thanks to being dry, we are not seeing any fungal problems yet. I have seen some death/decline of crowns due to J rooting, but that has not been significant. There have been some flaring populations of diamondback caterpillars in collards exacerbated by the use of broad-spectrum insecticides, which left few to no beneficials in the field. When dealing with diamondback caterpillars, make sure to scout early and often and use more targeted MOA’s to give your beneficial insects a helping hand. One or two applications of the various broad-spectrum insecticides can be detrimental and cause a boom in DBM populations.

J-rooting kept this strawberry plug from getting established. J-rooting is one of the most common reasons plants fail or are slow to get established. Photo from Phillip Carnley.
Severe damage from diamondback moth in collards. Photo from Phillip Carnley.

Weekly Field Update – 10/11/21

Statewide

There are some reports that anthracnose may be issue in strawberries this year. In addition, we are continuing to look out for the new disease, Neopestalotiopsis. Clemson Plant Pathologist Guido Schnabel has recommended applying Zivion S (natamycin) via preplant dip to help prevent these diseases. Dr. Schnabel provided the following instructions:

Mixing Instructions. Add Zivion S while stirring to the volume of water to be applied, or to a smaller volume that is then added to more water to make the expected final volume. Continuously stir the treatment solution unless it is to be applied immediately.
Application Time. Apply prior to plant as a preplant transplant root or whole plant dip treatment. Do not apply after or to harvestable commodities.
Application Rate. Root or whole plant dip: mix 6-12 fl. oz. (0.04 – 0.08 lbs a.i.) of Zivion S per 10 gallons of water. Dip plants for a minimum of 2 minutes, but no more than 5 minutes. Plant treated plants after dip application.

To find Zivion contact Nelson Jameson at 800-826-8302.

Coastal Region

Rob Last reports, “We are progressing well with preparations for strawberry planting. Some Plants are due to be delivered this week. Remember, if fumigants have been used, check to ensure the products have dissipated to prevent damage to the transplants. The same is true to make sure planting restrictions on any pre-emergence herbicides applications are observed. Always refer to the label. Finally, remember to check your plants carefully for pest and disease inoculum from the nursery. Planting any disease or pest-infected plants will lead to a more challenging. If you require any help, please reach to Extension Agents.”

Zack Snipes reports, “I thought I had moved to Seattle last week with all the rain and dreary weather. We have a good week of weather coming up and I expect that everyone will be busy in the fields transplanting greens, finishing laying plastic, and continuing the harvest of fall crops. Watermelons, squash, and winter squash are being harvested this week. Downy mildew is loving this weather and is on basil, squash, cucumbers, winter squash, and cantaloupe. I have seen many freshly transplanted fields with black rot in brassica. This disease shows up every time we plant brassica. It is essential to transplant quality transplants. If your transplant supplier is sending you diseased plants, then visit our Seed and Transplant Supplier list to find a new supplier. You might be surprised how big of a difference it makes. Carolina Farm Stewardship Association is having a webinar this week on Tuesday, October 12 at 12pm on Ginger and Tumeric production in a high tunnel. Please email zbsnipe@clemson.edu for link and passcode.

Black rot with its characteristic yellow “V” shaped lesion. Photo from Zack Snipes.
Transplants that are yellow and have black rot symptoms will not yield like healthy plants. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “We finally saw some sunshine this past weekend after a pretty rainy week. Caterpillar pressure has been high and lots of treatments have been going out. I’ve been seeing a decent amount of pathogenic fungi developing on diamondback moth caterpillars due to the wet conditions creating the perfect conditions for development. We’ve had a couple acres of strawberries planted and ordinarily we would be planting full steam ahead now, but strawberry plants are late coming in this year. Lots of folks are being told it will be next week before their plants come in. I’m also hearing reports that anthracnose may be a problem from nurseries this year. As a result, we are strongly recommending a fungicide dip on transplants before planting to combat this and any potential infections from the new disease Neopestalotiopsis. See Dr. Schnabel’s comments about Zivion above.”

This diamondback moth caterpillar’s corpse is covered in white fungal growth. The recent wet conditions have provided the perfect environment for entomopathogenic fungi development. Photo from Justin Ballew.

Phillip Carnley reports, “Cucumbers are finished in Orangeburg and Calhoun counties. Fall greens are in full swing with some pressure from DBM with the occasional looper. Growers are bedding strawberry fields and applying their pre’s. We have seen heavy infestations of gummy stem blight in fall watermelons, as well as spider mite damage in blackberries.”

Gummy stem blight has been bad in watermelons this fall. Photo from Phillip Carnley.
Yellowing from spider mite feeding in blackberry. Photo from Phillip Carnley.

Sarah Scott reports, “Tree removal and field prep for new peach installations are happening around the ridge. Strawberry plants are being planted now and got a good watering in with last weeks rain. Fall vegetables are looking good, growers should keep up with scouting for disease issues in the field following the week of wet and humid weather.

Tree removal and preparations for new planting are going on now along the Ridge. Photo from Sarah Scott.
Fall tomatoes are looking great. Photo from Sarah Scott.

Upstate

Andy Rollins reports, “I am busy scouting new strawberry plantings this past week. Be on the look out for leaf diseases of plants but also check roots thoroughly for discoloration. When planting make sure crowns are still visible after planting. We are also preparing ground for new peach production going in. We are still picking a few muscadines, but that will be finishing pretty soon.”

Fungal infection on a newly planted strawberry leaf. All plantings need to be looked after carefully for the new disease Neopestalotiopsis. Photo from Andy Rollins.

Weekly Field Update – 9/27/21

Coming up this Saturday (10/2/21) is a Waste Pesticide Collection Event held by the SCDA in York. Take a look at their news release here and take advantage of this event if you have any pesticides sitting around that you don’t expect to use.

Coastal Region

Zack Snipes reports, “We have had plenty of rain as of late in the Lowcountry. Many growers could not get in the fields due to fields being soggy. We have some beautiful weather coming this week so I expect a good bit of ground to be prepped and planted. We have plenty of moisture in the soil so those preemergent herbicides should have great efficacy if put down properly. I am seeing some odd yellowing symptoms of watermelon vines that lead to a collapse in the plant. We sent off samples to the Plant Diagnostic Lab. If you are suspicious of a plant disease, we can identify the disease for you. I also received a few calls this week about greenhouses. Before buying a greenhouse, consider retrofitting a shipping container. Thousands of transplants can be grown in a very small space which saves you money on your heating and cooling bill.”

A retrofitted shipping container for growing vegetable transplants at the CREC. Photo from Zack Snipes.
Thousands of transplants can be grown in near optimal conditions in a container. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “We’ve really been enjoying the fall weather here in the midlands. We got some rain and the high temperatures have been in the upper 70s/low 80s. The majority of folks got their beds formed and plastic laid for strawberries last week. I’m getting some reports that strawberry nurseries are facing a tight supply this year. Hopefully, everyone got their orders in early. On brassicas, we’ve seen a significant increase in caterpillar population levels over the last week. That makes now a great time to run a field bioassay to screen for insecticide resistance in diamondback moth populations. Contact your local agent to schedule one.”

Tiny, oval, yellow-colored, diamondback moth eggs on the underside of a leaf of a week-old collard plant. Scout carefully as soon as plants go in the ground. Photo from Justin Ballew.

Phillip Carnley reports, “Brassica production is ramping up in Orangeburg and Calhoun and Clarendon counties. Diamondback caterpillar is making itself known in brassica crops, especially in collards. Make sure to scout early and treat in a timely fashion. If your insecticide program is not showing the desired level of control, talk with your local agent about scheduling a bioassay to assess your population’s resistance to different insecticides. Also, be on the lookout for black rot and other fungal problems in early transplants. Loopers seem to be a non-issue currently but stay vigilant in monitoring. I am still getting plenty of calls for pecans and the majority of the issues are pecan scab and yellow aphid damage, causing nut drop and premature defoliation. Also be mindful to monitor/ test for nematodes, in my area I am seeing population loading due to lack of cultural and chemical control. On blackberries, make sure to harvest in a timely manner and maintain a high level of sanitation, as there is plenty of spotted wing drosophila to go around.”

African Fig Flies (AFF)(with the white stripes) can invade small fruit crops simultaneously with spotted wing drosophila (SWD). Once the SWD cuts a hole in the fruit to lay an egg, the AFF comes along and lays an egg in the same hole. AFF can also invade strawberries and blackberries independent of SWD. Photo from Phillip Carnley.

Pee Dee

Bruce McLean reports, “Last week’s rainfall really helped to moisten dry soils around the Pee Dee. Fall vegetable crops are coming along. Disease activity is low and insect activity is light to moderate. Surprisingly, diamondback moths have not been observed yet. Looper activity has been light to moderate on brassicas and cabbageworms have been observed in some fields. Aphids have been seen, as well. Stink bug activity has been moderate on okra. Okra harvest has begun to slow down, but decent volumes are still being harvested. Wine and juice muscadine harvest is complete, but some fresh market muscadines are still being picked in limited volumes. Most folks have bedded and fumigated for strawberries (… or will be this week). Talking to growers, it sounds like strawberry plants (plug and bare root) are getting a bit scarce… more so than normal for this time of the year. If you’re looking for some plants, you may have to go with varieties that you might not familiar with. Be sure to order early next year to get the varieties and volumes you need.”

Weekly Field Update – 3/29/21

Coastal

Rob Last reports, “Strawberry crops continue to develop well with sustained flowering and fruit set. Early crops are ripening well with crops coming to market. Just a note of caution, the weather last week can be conducive to gray mold development, so fungicide programs are going to be key. Thrips are active in some crops too, so keep scouting. Melon transplants are going in the ground over the last week with development looking very promising. Peaches in the area are all but finished flowering with great fruit set. Finally, as we are looking at a cooler week for flowering fruit crops, keep an eye on the forecast temperatures to determine if protection is going to be required. Fruit and closed buds can tolerate cooler temperatures than flowers, but damaged flowers can increase gray mold development.”

Strawberries continue to develop well in the Coastal region. Photo from Rob Last.

Zack Snipes reports, “We have had pretty good weather as of late and it has really made things jump here.  Spring greens, onions, radishes, carrots, and strawberries are really pushing out hard.  I counted 57 green berries+flowers on one strawberry plant. If someone can beat that number, I will give you a Free Crop Handbook. The blueberry crop is looking great with a good fruit set on highbush varieties and tons of flowers right now on the rabbiteye types.  We planted around 30 citrus trees on Friday as part of a Specialty Crop Block Grant.  We have around 75 more to plant next year.  All in all we will plant somewhere around 40 varieties with varying scion and rootstock combinations.  We are looking at cold tolerance in both the lab and a field setting and monitoring for citrus greening.  We will plant everything from kumquat to grapefruit to finger limes.

Newly planted citrus trees at the Coastal REC this past week. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “Last week was pretty cloudy, but we had a couple beautiful days that reached the 80s. Though we’ve had a little bit of rain, the air has been thick with pine pollen. We’re seeing a few strawberries ripen but we’re still not at the point where we can open the U-Picks. We’re running a little behind where we’ve been in the past few years and I suspect all the cloudy weather we’ve had over the last month is partially to blame. I’m seeing a good bit of misshapen fruit, which is normal for the very first fruit that develop. This is usually related to pollination, but make sure you tissue sample to make sure boron levels are where they need to be. Watch out for the cool nights in the forecast later this week. We may need to cover. Spring planted brassica crops are looking good. Diamondback moths are showing up in places, especially near fields where a fall crop was grown through the winter, so be sure to destroy those fields once harvest is finished.”

Misshapen fruit are pretty common early in the season. Its usually related to pollination, but can be a sign of low boron. Tissue sample to make sure boron levels are adequate. Photo from Justin Ballew.
Spring planted brassicas are growing well and looking good. Photo from Justin Ballew.

Sarah Scott reports, “Peaches are progressing quickly with small fruit forming on early varieties. Georgia has reported plum curculio activity in the middle part of the state so orchards in the Ridge of SC can expect to see activity in about 2 weeks. Check the 2021 management guide for control options which include Imidan, Actara, Belay, and Avaunt. Strawberries farms are on track to begin picking regularly April 1. Spring greens are being transplanted as well.”

Pee Dee

Tony Melton reports, “Strawberries are ready to burst forth and there are already some fruit on Ruby June. Working to protect strawberries and peaches later on this week. A lot of summer crops will be going into the ground after Easter. Pickle growers are biting at the bit.  Most greens are just emerging. Cabbage is enjoying the weather and getting to what I call the whirl stage so hope we have no damaging winds to wring them off. Sweet potatoes slips are just emerging on the beds.”

Upstate

Weekly Field Update – 3/22/21

Join us this Wednesday (3/24/21) at 12:30 pm for a discussion on diamondback moth management in Brassica crops. It will be a relatively short meeting, lasting around 45 minutes, so tune in while you eat your lunch. Click here to register.

Coastal

Zack Snipes reports, “We got some needed rain but we got a lot of it in a short amount of time.  Winter peas and spring planted brassicas are looking good.  Tomato and squash are in the ground on some farms but because of the cooler weather and soil temperatures, really haven’t taken off yet.  I see a lot of brassica fields leftover from the fall.  These fields are harboring all of our insects and diseases that we will have to fight this coming season.  Mow these fields down and turn them under. Do not leave them.  I am seeing lots and lots of diamondback moths and black rot in these leftover fields.  Some more sad news this week from the Lowcounty as Mr. Adair McKoy, Sr. passed away this past week. Mr. McKoy was full of wisdom and had years and years of practical farming knowledge that he loved sharing with others.  Never did I visit him when I didn’t learn something new.  His love and care for the land was truly inspirational.”

Leftover collards from the fall that need to be mowed and tilled in. Photo from Zack Snipes.
A diamond back moth, one of thousands, I found in the leftover collard field. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “We had some cooler, wetter weather last week that slowed things down a bit in the fields. Several brassica fields that were planted in the fall and grew through the winter are right on the verge of bolting. If harvest is finished in these field, they need to be bush hogged and disked in as soon as possible to keep diamondback moths and any other caterpillars from breeding and making their way into spring planted fields. Strawberries are still coming along. There are lots of green fruit and a few are ripening here and there. I heard of the first few being picked in Lexington County last week. The weather conditions this week are going to be perfect again for Botrytis spore development, so don’t let up on spray programs.”

Fall planted mustard is just starting to send up flower heads. Photo from Justin Ballew
Lots of developing fruit on strawberries. Photo from Justin Ballew

Weekly Field Update – 11/23/20

We have added a new resource under the “Resources” section. On the right side of the page, you will find a link labeled “Plant and Seed Supplier List.” This is a list of reputable nurseries and seed suppliers that growers in SC regularly work with. If you know of a good nursery or seed supplier you would like to suggest adding, just let us know.

We would also like to take the opportunity to wish everyone a happy, healthy, and safe Thanksgiving!

Coastal

Rob Last reports, “Strawberry crops continue to develop well with minimal pest and disease pressure so far.  Fall vegetables are progressing towards market.  We are continuing to see pest pressure from caterpillars and a few isolated aphids have been spotted during scouting. As we progress towards the holiday season, scouting of crops remains of vital importance to catch insect infestation and disease progression early for treatments to be effective.”

Zack Snipes reports, “The week of wet weather two weeks prior prevented folks from getting out in the fields to spray for insects. I am seeing lots and lots of worm damage, particularly the diamond back moth.  We need to get ahead of this pest so that we have good looking greens for the New Years Market. There are some very good products that we can use but knowing which ones to use and when to use them is where Clemson Extension can help. If you have swiss cheese plants, then give us a call to help out. The strawberry crops looks ok so far this season. The warm weather has really helped later seeded/transplanted crops. I am seeing some die off/rot in root crops in lower lying areas of fields.”

Don’t forget about your strawberries while eating turkey this year (No those are not chocolate covered raisins). Photo from Zack Snipes.
Graffiti cauliflower almost ready to harvest. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “Temperatures got a little cooler last week, with frost showing up in some low lying areas, mostly north of Columbia. Early season growth of strawberries has been impressive so far. As warm as it’s been this fall, early season row covers probably will not be necessary this year unless plants were transplanted late. Caterpillar population size and damage seems to be on the rise in brassicas. I saw some fields this past week where insecticide applications weren’t made in a timely manner nor were materials rotated properly and the caterpillar populations have really gotten out of hand. Call us if you have questions about controlling caterpillars and never use broad spectrum insecticides when caterpillars are your primary pest!”

We’ve had good early season strawberry growth so far. Photo from Justin Ballew.
How many diamondback moth caterpillars and pupae can you count on this leaf? This is a key reason why weekly scouting, timely spraying, proper insecticide rotation, and avoiding broad spectrum insecticides for caterpillar control are so important. Photo from Justin Ballew.

Pee Dee

Tony Melton reports, “Still a lot of sweetpotatoes in the ground.  The bacterial diseases (Xanthomonas and Pseudomonas) on greens are raging havoc.  Rotation is the best control I have found.  I hate swinecress when it comes to greens -it takes over.  Yellow margined beetle is getting worse in  greens and spreading all over the state – Imidacloprid is a good control without killing beneficials.”

Upstate

Kerrie Roach reports, “Things have certainly slowed down in the field the last few weeks. Apples are mostly finished for the season with ‘Arkansas Black’ being the last variety to be picked. Most growers will keep roadside markets open until Thanksgiving and then call it a quits for the season. Now begins the prep for next year with educational meetings, pesticide certification credits, soil testing, land prep and more. Make sure you are checking the events page for the upcoming trainings.”

Weekly Field Update – 9/8/20

Statewide

Dr. Matt Cutulle reports, “With all the rain we had in August the weed seed bank is starting to pop. Nutsedge pressure can be really tough in September.  For fall cole crop plantings, it is important to initiate the stale seed bed technique (allow weeds to come up and burn them down multiple times before planting). In some cole crops, such as broccoli, Dual Magnum may be used, which provides some pre-emergent suppression of yellow nutsedge (Max 60% probably). Following with an in-row cultivation several weeks after planting will strain the photosynthate reserves of nutsedge, which could be lethal to the nutsedge if we get a  cold snap in late October.”

Coastal

Zack Snipes reports, “I saw whiteflies everywhere last week.  I saw them on just about every crop in the field: squash, zucchini, tomato, peas, eggplant, okra.  We have very good options to manage whiteflies, so consult with your local agent or look up the specific products for the crop you are growing in the Southeast Crop Handbook. Be careful not to use pyrethroids for whiteflies as resistance will develop very quickly.  Longer lasting, more specific options are available that are better options.  I also saw a good many worms last week such as the melonworm in cucurbits and the beet armyworm in other crops.  If you have whiteflies and worms in a crop then the group 28 insecticides (Coragen, Verimark/Exirel, Harvanta) are excellent options to take care of both pests at the same time with good residual.”

Whitefly infestations are severe in some places on the Coast. Photo from Zack Snipes.
Whiteflies on tomato leaves. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “Last week was extremely hot and dry, though we finally got some relief from the heat over the weekend. Crops are progressing well, though we are seeing caterpillar activity increase. We’re seeing diamondback moth and cabbage loopers in brassica crops and armyworms in tomatoes. Be sure to rotate insecticide MOA’s when treating for caterpillars. I’m also seeing a few whiteflies around, but nothing severe yet. Black rot is starting to show up on some brassicas. Strawberry growers are starting to apply their preplant fertilizers in preparation for shaping the beds.”

Black rot getting started on a young collard plant. Photo from Justin Ballew

Pee Dee

Bruce McLean reports, “Muscadine harvest is starting to wind down. Harvest looked good and had very good yields. Brix averaged out at 13.5 to 14.5%, depending upon the cultivar and the vineyard. Now is a good time to evaluate successes and problems from this season and write them down while they’re fresh on your mind. Also, look at the overall amount of foliage on the vines. Is it too much? Not quite enough? Start planning how you need to adjust fertility for next year. A post-harvest potassium fertilizer application has proven to be beneficial to the crop (in on-farm settings), especially in wet years. Overall plant health, spring emergence and vigor, and next year’s yields should be well improved.”

A bin of Carlos muscadines ready to be loaded and delivered for processing. Photo from Bruce McLean.

Tony Melton reports, “Getting dry and need some rain. Busy planting turnips, mustard, and collards. Harvesting processing sweet potatoes as quickly as they can process them (problems in the plant). Picking pickles and yielding much better with dryer conditions. Also, pickling plants having trouble with getting enough labor so very few peppers harvested. Still spraying processing peas for cowpea curculio. Watch out for southern stem blight it is still raging havoc.”

Upstate

Kerrie Roach reports, “The last few peaches are making their way to stands and markets. Things are continuing to look good as the Apple crop progresses in the upstate. Growers to the north in Hendersonville, NC suffered multiple hail events causing a large amount of damage, but SC growers seem to have escaped the worst of it. Vegetable production has slowed significantly with many small growers finishing for the season over the next few weeks. Muscadines are coming into their prime, and look to be highly productive this year.”

Golden Delicious apples that still have a little ways to ripen for optimum sugar content, but work great for baking. Notice the green tint. As they continue to ripen, a yellow cast & even a blush may appear. Photo from Kerrie Roach.

Andy Rollins reports, “These plants were found positive for Phytopthora root rot last week in an early upstate strawberry planting.  Inspection of plants when they arrive can accurately diagnose this problem.  Brown to blackish colored roots are characteristic.  A small portion of this material is taken from 5-10 plants then placed into a pouch that accurately identifies the presence of Phytopthora within a few min.  As in picture, 1 line tells you the test worked properly 2 lines indicates presence of the fungus.  Early treatment with Ridomil and or any of the phosphite (Rampart/Prophyt) is very helpful but must begin quickly if plants are widely infected for the best results.”

Dark colored roots are a characteristic symptom of Phytophthora root rot. Photo from Any Rollins.
An immunostrip test can be used to diagnose phytophthora. Two horizontal red lines on the strip (right side of the bag) means the sample is positive for phytophthora. Photo from Andy Rollins.

Field Update – 5/11/20

Coastal

Zack Snipes reports, “We have had some weird weather for May touching 90 one day to in the 40s at night.  Despite the fluctuating temperatures, crops like squash, zucchini, snap beans, and cukes are all coming in and looking pretty good. Melons and tomatoes are looking ok but cooler temperatures and persistent winds with sandblasting is common this spring.  Those wind-stressed and sandblasted plants will be more susceptible to disease so make sure to follow fungicide programs closely.

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Provider green beans are loaded up. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “Last week started out quite warm, which had crops developing quickly. Spring planted brassicas grew fast and Squash seedlings really jumped out of the ground. Diamondback moth caterpillar populations are still high in places and we’re starting to see cabbage loopers as well. Strawberry growers are still reporting good sales. Thankfully, it’s cooled down again (at least for a few days) and that will help strawberry plants develop more blooms before it warms back up. As the weather becomes warm and dry this week, scout closely for spider mites.”

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Great looking broccoli head ready to be harvested. Heads developed very quickly in the warm weather last week. Photo from Justin Ballew.

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Cabbage loopers are showing up in brassicas. Photo from Justin Ballew.

Sarah Scott reports, “We are picking early variety peaches along the Ridge. Strawberries are still being harvested in the area as cooler nighttime temperatures have slowed ripening. Imported cabbageworm and diamondback moth caterpillars can be found in slightly higher numbers on broccoli and cabbage plants. Windy weather has made spraying in the fields and orchards challenging.

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Bacterial canker on a peach tree. Lesions with distinct lines between healthy and diseased wood found under bark on declining trees. Photo from Sarah Scott.

Upstate

Kerrie Roach reports, “Temperatures in the Upstate were in the mid to low 30’s this weekend causing many growers to take precautions. Strawberry growers who had put their row covers away for the season, brought them back out. At this point, the low temperatures do not appear to have caused much damage. The weather is projected to even out this week, and nighttime temperatures are coming up. We are hoping for a great week of growing!

Field Update – 4/13/20

All of SC is now under a “Home or Work” order from Governor McMaster. Farming is an essential industry, so Commissioner Weathers has issued this Notice of Essential Food and Agricultural Employee form that farms may fill out for each employee certifying them as an essential employee. Employees should keep this form with them while commuting to and from work.

Coastal

Zack Snipes reports, “We had a great week of weather last week in the Lowcountry.  I am extremely concerned and curious to see what things look like after the powerful line of storms we had Monday morning.  I feel like we will see lots of damage to taller crops and in areas where there were no windbreaks.  If plants suffered in the storm and have open wounds from sand, wind, or tying twine, then expect to see more disease.  It would be a great time to get out some fungicides and bactericides to prevent spreading of diseases.  As of Friday, our crops looked great.  I have been seeing LOTS of damage by our biggest pest in the Lowcounty…DEER.  Fencing is cheap compared to the amount of money you are losing to browsing damage. Check out this publication on fencing.

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A deer browsed tomato (left) and un-browsed tomato (right).  Photo from Zack Snipes.

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When browsing occurs, other competitors such as nutgrass take hold further impacting yield. Photo from Zack Snipes.

Midlands

Justin Ballew reports, “The weather was nice last week and crops really responded. Brassicas and sweet corn are both growing really fast. Strawberry production really picked up last week too. Luckily, sales at produce stands have been really good lately. We had a really strong storm come through early Monday morning and we expect to see some water damaged strawberries as a result and probably some diseases like black rot on brassicas.  Strawberry growers, be sure to sanitize the plants well so damaged fruit won’t become inoculum for Botrytis and anthracnose.

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Workers at James Sease Farms in Gilbert grading strawberries fresh from the field. Strawberry season is in full swing. Support your local farmers!  Photo from Justin Ballew.

Sarah Scott reports, “The peach crop is coming along nicely. Some high chill hour requiring varieties are developing at an uneven rate but only time will tell if there will be a good crop on those. Strawberry production is picking up. A couple of cooler nighttime temperatures may have slowed progression a bit but harvests are still on the rise. Field crops like spinach, kale, and broccoli are performing well. Some cucurbits being planted as well as tomatoes as labor needs are filled.

Monilinia fructicola

Blossom blight caused by the fungi, Monilinia fructicola. Extended bloom and lots of rain during winter months made ideal conditions for infection. Refer to the 2020 Peach Management Guide for information on treating and preventing spread of brown rot. Photo from Sarah Scott.

Pee Dee

Tony Melton reports, “Awful infestation of early season diamondback caterpillar on brassicas like collards/cabbage most likely due to the overwintering on brassicas like radish in cover crops.  When these crops are terminated for summer cropping these insects and other insects like yellow-margined beetle invade vegetable production fields.  Also, cover crops containing brassicas should not be used in vegetable production fields because they increase diseases like bacterial soft rot and sclerotinia, which are tremendous problems in all types of vegetable crops.

I hope all strawberry growers got their ripe fruit out of their fields before this storm – if not a lot of fruit will most likely be discarded.  Some rain was needed hope not too much falls – in S.C. when it rains it pours.  Most summer crops are planted and we did get some wind damage and sandblasting causing stunting but no frost damage in the Pee Dee.  The first plantings of processing tomatoes, peppers, and cucumbers are in and after this rain more will be quickly following.  Spring brassicas are loving this rain.”

Upstate

Kerrie Roach reports, “It was confirmed that a tornado touched down in Seneca, SC early this morning around 3:30am. Reports of damage to agricultural operations have been limited, but there is certainly significant damage to business and residential structures. Apple and peach crops are looking good right now. We have many farmers market operations who will be replanting/reseeding after last night’s heavy rains.”

Andy Rollins reports, “We have been trapping high numbers of Oriental Fruit Moths in pheromone traps in peach orchards in upstate SC weekly.  Numbers have been much higher in our late season varieties.  We are assisting growers with correct timing of spray applications directed at egg hatch.  We are also encouraging growers to rotate insecticide classes to prevent failure of the pyrethroids if this hasn’t already occurred.  Dr. Brett Blaauw UGA/Clemson peach entomologist has been directing the effort aimed at reducing damage from this pest.”

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Oriental fruit moths captured on a sticky trap. Photo from Andy Rollins.