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(Beyond Pesticides, December 14, 2022) Ultraviolet (UV-C) light has the potential to successfully manage mite (Tetranychus urticae) populations without reducing yields or resorting to toxic pesticides, according to research published by scientists at University of Florida. “Since very few miticides (sprays) are currently effective in suppressing twospotted spider mites in strawberries, the use of UV light provides an effective physical control method that can be used in fields and in high-tunnel strawberry production systems,” says study author Sriyanka Lahiri, PhD. The findings provide an encouraging technique for farmers, but further investigation is needed to observe the success of this approach in other cropping systems.   Researchers compared the efficacy of four treatment approaches, including use of the insecticide spinetoram, a low powered application of UV-C light twice a week, a high-powered application of UV-C light twice a week, and an untreated control. Researchers also looked closely at mite egg hatchability by rearing eggs in the laboratory and then transferring them out to the field for treatment with UV-C light. Results were not consistent across the two-year trial as researchers indicate that in most of the field trials, no effect was seen due to low levels of natural infestation. However, during […]

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