Zing! registered for use against potato late blight and early blight

A mixture of zoxamide and chlorothalonil, Zing! fungicide is registered for use against potato late blight and early blight in Michigan.

Zing!, a mixture of zoxamide and chlorothalonil, has been registered for use against potato late blight and early blight. Growers may use 32-34 fluid ounces per acre applied on a preventative schedule. Applications may begin when conditions are favorable for disease development. Use a five- to seven-day schedule (the minimum re-treatment interval is five days) when disease is present and environmental conditions favor continued disease development. Use the highest rate and shortest interval when plants are rapidly growing and disease conditions are severe. Use the maximum labeled rate at row fill. Under low disease conditions and environmental conditions unfavorable for disease development, a seven- to 14-day application schedule may be used. Increase water spray volume as canopy density increases. Apply by ground, aerial or chemigation. Do not exceed a 10-day interval between applications when using chemigation.

The Zing! fungicide label is available at CDMS.net. Growers can also read an extract of a report on the evaluation of fungicide programs for potato late blight control from the potato pathology program trials conducted at the Michigan State University Clarksville Research Center in 2014. The trial was inoculated with isolates of the US-23 genotype of Phytophthora infestans. Trials with the numbered product over the past three years have been similar with consistent excellent control of the pathogen. The registration is timely considering there may again be a shortage of chlorothalonil in the United States for 2015.

Dr. Kirk’s work is funded in part by MSU’s AgBioResearch.

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