Tag: kale
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Southern Blight is an Unusual Disease on Kale
By Clemson Plant Pathologist Tony Keinath Southern blight is rarely seen on kale or any other brassica crop. In the United States it’s been reported on other brassica vegetables grown in Alabama and Texas. This week, I was surprised to see southern blight causing stem rot just above the soil line on several plants of…
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White Mold is Active so Spray Now
From Clemson Plant Pathologist Tony Keinath and Extension Associate Justin Ballew The freezing weather the week of January 21, 2025, was just what the Sclerotinia white mold fungus was waiting for. While cold temperatures discourage most animals from being active, freezing temperatures trigger Sclerotinia sclerotia (the survival structures in soil) to germinate, produce tiny mushrooms,…
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Biopesticides (Seem to) Perform Poorly Against Black Spot on Kale
From Clemson Plant Pathologist Tony Keinath. As part of a USDA Organic Transitions Program grant, we tested 10 biopesticides on organic kale ‘Oldenbor’ to see if any product controlled Alternaria leaf spot, a.k.a. black spot. Unfortunately, none look promising as no biopesticides reduced black spot compared to the nontreated control based on repeated greenhouse trials…
The South Carolina Grower 