Tag: downy mildew
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Fog and Downy Mildew on Collards
From Clemson Plant Pathologist Tony Keinath. Foggy fall mornings are nature’s warning that conditions are favorable for brassica downy mildew to get started on collard and kale. Remember that because downy mildew affects the harvested, edible portion of the crop, control practices must be very effective to increase yields. Use the following practices to maximize…
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Weekly Field Update – 7/19/21
Statewide Dr. Tony Keinath’s remarks on fungicide stewardship: Growers who are applying newer fungicides that are pre-mixes of two active ingredients do not need to add another fungicide to the tank mix. Pre-mixes can easily be identified by the two FRAC Codes on the label in the top right corner. Please consider the following points:…
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Weekly Field Update – 7/6/21
Statewide Dr. Tony Keinath reports, “Basil downy mildew was found in mid-June in Charleston. Symptoms start as faint yellowing of leaves, which eventually show brown spots surrounded by yellow areas. To see the spores, look on the bottom of a symptomatic leaf. Sometimes it helps to hold the leaf up to a light source (but…
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Downy Mildew on Watermelon Found in SC
From Clemson Plant Pathologist Tony Keinath. Downy mildew was found on watermelon this week in Allendale and Barnwell counties. Although downy mildew does not infect fruit, it reduces sugar content once 1 in 4 leaves (25%) are infected. All watermelons should be sprayed with a fungicide effective against downy mildew. See pages 214-215 in the…
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Weekly Field Update – 6/1/21
Coastal Rob Last reports, “On the whole disease pressure in most crops remains low. The exception is cucurbits where we are finding powdery mildew in cucumbers as well as downy mildew. Cucurbit bacterial wilt has been found in isolated fields. This disease is characterized by wilting of one vine or the whole plant. Once cut the stem…
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Weekly Field Update – 5/24/21
Coastal Rob Last reports, “As we mentioned last week, cucurbit downy mildew has been confirmed in cucumber crops locally. All cucurbit growers should be applying downy-mildew specific fungicides such as Ranman tank mixed with either chlorothalonil or mancozeb. Other pests and disease levels in cucurbits remain low. Tomatoes and peppers are developing well with good fruit…
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Cucurbit Downy Mildew Found In SC
Cucurbit downy mildew was found in SC this week in Bamberg, Barnwell, and Calhoun Counties. In each case it was found on cucumbers and for now severity seems low. This is about two weeks earlier than in the past couple years. If not already doing so, all cucumber and cantaloupe growers in SC should begin…
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Weekly Field Update – 5/17/21
Check out the new podcast, “The SC Grower Exchange” featuring Clemson Extension fruit and vegetable agents. The podcast is moderated by Sarah Scott from Edgefield and covers a more detailed look at what is happening in the fields across the state. New episodes are recorded weekly, so listen weekly and subscribe through Spotify, Google, or…
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Weekly Field Update 8/24/20
Statewide Dr. Tony Keinath reports, “For the past few years, Orondis Opti on cucumber and cantaloupe and Orondis Ultra on pumpkin and watermelon have been the best fungicides to manage downy mildew. Based on results from a spring 2020 cucumber experiment at Coastal REC, Orondis is no longer the “silver bullet” it was 2 years…
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Field Update – 6/29/20
Coastal Rob Last reports, “In our area crops are generally looking good with watermelons and cantaloupes coming to harvest. From a pest perspective, we are finding some early pickleworm and melon worm damage occurring. In addition, cucumber beetles and squash bugs remain active. Cucurbit downy mildew is being found in the area and as such…
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