Kaolin Powder Clay at Amazon for $9.00 per pound has been shown to confuse and or make feeding difficult for thrips insects that attack vegetables and ornamental plants.
In an article, Thrips Research in Florida, details of how the clay might be used in combination with tea-tree oil, lemongrass oil or geraniol to significantly reduce thrip feeding and the viruses transmitted by the feeding.
In a previous article, Mama Mia - Garlic Extract Controls Garden Pests , we talked about how effective garlic extract is for us in production as a soil drench. Other Florida growers have found that weekly spraying one quart per half acre per 100 gallons of Alsa (garlic extract) controls thrips as well as synthetic chemicals on crops like crotons. The goal is to find enough alternatives to make control as safe as possible and still effective. We also want to not make thrips resistant to synthetic chemicals by overuse. We have made great strides recently. Let us know what you have found to be most effective against Florida pests.
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