Tag: Disease
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Urgent: Powdery Mildew Found on Watermelon in Charleston, SC
From Clemson Plant Pathologist Tony Keinath. Powdery mildew was found on three cultivars of seedless watermelon at the Clemson Coastal REC on May 23, 2023. All watermelon crops in South Carolina should be 1) scouted for powdewry mildew and 2) if found, sprayed to prevent powdery mildew from reducing yields by up to 40%. When…
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2023 Fusarium Wilt on Seedless Watermelon Experiment – Week 5 Observations
From Clemson Plant Pathologist Tony Keinath This year’s Fusarium wilt experiment includes 3 seedless cultivars, 3 fungicide treatments applied via drip irrigation, and grafting. (This experiment is supported in part by a USDA SCRI grant.) Transplants were set April 5 in a field infested with Fusarium races 1 and 2. Right on schedule, symptoms of…
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Cucurbit Downy Mildew Found in SC
Prepared by Rob Last, Justin Ballew, and Tony Keinath. Cucurbit downy mildew was identified in South Carolina on 5/12/23. The identification came from butternut squash grown in a sentinel plot at the Coastal REC in Charleston. The same strain that affects butternut squash also affects watermelon and summer squash. Now that downy mildew has been…
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2023 Fusarium Wilt on Seedless Watermelon Experiment – Week 3 Observations
From Clemson Plant Pathologist Tony Keinath This year’s Fusarium wilt experiment includes three seedless cultivars, three fungicide treatments applied via drip irrigation, and grafting. This experiment is supported in part by a USDA SCRI grant. There also is a side experiment with SP-7 pollenizers grafted onto ‘Carolina Strongback’ rootstock and non-grafted SP-7 supported in part…
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Weekly Field Update – 4/24/23
Check out upcoming meetings on the Upcoming Events tab, and don’t forget to look at our Resources tab for links to crop handbooks, helpful websites, and related blogs. Also, check out the latest episode of the SC Grower Exchange Podcast. Be sure to scroll all the way to the bottom to see this week’s Question…
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Question of the Week – Phytophthora Crown Rot
This week, the question was: What caused the dark brown discoloration in this strawberry crown? This discoloration is a common symptom of Phytophthora crown rot. Wet conditions favor this disease; therefore, we tend to see it develop after periods of increased rainfall, especially in low areas in the field. The first symptom we notice is…
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Weekly Field Update – 4/17/23
Check out upcoming meetings on the Upcoming Events tab, and don’t forget to look at our Resources tab for links to crop handbooks, helpful websites, and related blogs. Also, check out the latest episode of the SC Grower Exchange Podcast. Be sure to scroll all the way to the bottom to see this week’s Question…
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Weekly Field Update – 4/10/23
Coming up this week, we have a couple more Pesticide Collection Events hosted by the SCDA. This is a great opportunity to get rid of any old unwanted pesticides you have lying around the shed. Check out other upcoming meetings on the Upcoming Events tab. Don’t forget to look at our Resources tab for links…
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Bacterial Spot on Tomato: Are the Cures as Bad as the Disease?
From Clemson Plant Pathologist Tony Keinath and Extension Agent Zack Snipes. Now that tomatoes are in the ground in coastal South Carolina, it’s time to think about a tomato spray program for a disease that shows up every year: bacterial spot. Current recommendations are based on a tank mix of copper + mancozeb. The comments…
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Weekly Field Update – 4/3/23
Coming up this week, we have a couple of Pesticide Collection Events hosted by the SCDA. This is a great opportunity to get rid of any old unwanted pesticides you have laying around the shed. There is also a webinar on Composting coming up on Wednesday. Check out other upcoming meetings on the Upcoming Events…
The South Carolina Grower 