25%乙嘧酚悬浮剂防治黄瓜白粉病田间药效试验研究

为验证25%乙嘧酚悬浮剂防治黄瓜白粉病的防治效果,确定其大田使用剂量,乙嘧酚喷施后通过叶片和根吸收,产生内吸保护作用。用于叶面喷雾,又可经叶吸收传导,可防止病害蔓延到新叶。试验结果表明,25%乙嘧酚SC70～90mL/667m2防治黄瓜白粉病,间隔7d连续施药两次,于第二次施药后7d、14d各调查一次药效,其平均防治效果分别为89.9%和93.4%。

Controt Efficacy of 25% Ethirimol SC against Cucumber Powdery Mildew

The experiment is aimed to verify the preventing and curing efficacy of cucumbers' powdery mildew by 25% ethirimol deflocculants and make sure of the dosages in the fields.After the spraying,leaves and roots will absorb the ethirimol and produce an adduction protecting role.Besides,the atomizing spraying on the leaf surface will make the ethirimol absorbed and transmitted by leaves,so the disease is kept from spreading to new leaves.The experiment results show that ethirimol 25% SC 70~90 mL/667 m2 prevents ...