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Temperature Influences Persistence of Chlorothalonil and Iprodione on Creeping Bentgrass Foliage

P. L. Koch and J. P. Kerns

July 2015


Fungicides play a critical role in the management of plant diseases, yet the impact of temperature on foliar fungicide persistence remains unclear. The objective of this study was to determine the relative persistence of chlorothalonil and iprodione on creeping bentgrass leaf blades at 10, 20, and 30°C in 2 separate experiments. The results indicate that fungicide persistence decreases with increasing temperature, which may help explain why fungicides more commonly fail to provide adequate disease protection during periods of hot temperatures.


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