高效、低毒药剂对黄瓜灰霉病的防治试验

Controlling Test of High Efficiency and Low Toxicity Fungicides to Botrytis cinerea on Cucumber

为保证黄瓜的品质和安全,明确3种杀菌剂对黄瓜灰霉病的田间防治效果,进行田间防效试验。结果显示:化学药剂25%啶酰·咯菌腈悬浮剂、20%嘧霉胺悬浮剂防治黄瓜灰霉病速效性较好,第1次施药后7 d防效分别为83.0%和78.6%,生物药剂1000亿CFU/g枯草芽孢杆菌可湿性粉剂具有较好的持效性,第3次施药后14 d防效为65.2%。建议黄瓜灰霉病发生初期可优先使用生物药剂防治,田间危害严重时使用25%啶酰·咯菌腈悬浮剂、20%嘧霉胺悬浮剂,同时轮换使用其他药剂,防止产生抗药性。

In order to ensure the quality and safety of cucumber,the field control effects of three fungicides to Botrytis cinerea on cucumber were studied.The results showed that the chemical fungicides 25%boscalid fludioxonil suspension concentrate(SC)and 20% pyrimethanil SC were effective in controlling Botrytis cinerea on cucumber.The control effects were 83.0% and 78.6% at 7 days after the first application respectively.The biological fungicide 100 billion CFU/g Bacillus subtilis wettable powder had good persistence,and the control effect was 65.2% at 14 days after the third application.It was suggested that biological fungicides should be used preferentially in the early stage of Botrytis cinerea on cucumber,and 25% boscalid fludioxonil SC and 20% pyrimethanil SC should be used when the damage was serious in the field,and other fungicides should be used alternately to prevent the occurrence of resistance.