[目的]黄瓜霜霉病是黄瓜生产中的常见病害,测定植物源新农药6.5％姜黄根茎提取物乳油对黄瓜霜霉病的田间药效.[方法]以化学合成农药687.5 g/L氟菌·霜霉威悬浮剂为对照药剂,2022、2023年连续2年在上海市松江区开展田间小区药效试验.[结果]2022年试验第3次用药后7 d供试药剂34.125、24.375 g a.i./hm2处理组防治效果分别为76.20％和72.06％,该效果与对照药剂687.5 g/L氟菌·霜霉威悬浮剂没有显著差异.2023年试验第3次用药后7 d供试药剂34.125、24.375 g a.i./hm2处理组防治效果分别为80.33％和75.03％,34.125 g a.i./hm2处理防效显著高于对照药剂.[结论]6.5％姜黄根茎提取物乳油对黄瓜霜霉病防治效果比较显著,是具有潜力的植物源新农药.
Field control efficacy of turmeric rhizome extract 6.5％EC against cucumber downy mildew
[Aims]Cucumber downy mildew(Pseudoperonospora cubensis)is a common disease in cucumber production.This study aims to test the field efficacy of a new plant-derived pesticide,turmeric rhizome extract 6.5％EC,to control downy mildew in cucumber.[Methods]The chemically synthesized pesticide fluopicolide·propamocarb 687.5 g/L SC was used as a standard product control,and field efficacy trials were carried out in Songjiang District,Shanghai,China,for two consecutive years in 2022 and 2023.[Results]In 2022,the control efficacy of 34.125 and 24.375 g a.i./ha treatment groups was 76.20％and 72.06％,respectively,which was not significantly different from that of the standard product control.In 2023,the control efficacy of the 34.125 and 24.375 g a.i./ha treatment groups was 80.33％and 75.03％,respectively.The control efficacy of 34.125 g a.i./ha treatment was significantly higher than that of the standard product control.[Conclusions]Turmeric rhizome extract 6.5％EC is effective in the control of cucumber downy mildew and is a potential new plant-derived pesticide.
turmeric rhizome extract ECcucumber downy mildewfield control efficacy
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