To screen out efficient pesticides for controlling the rapeseed downy mildew disease that are suitable for the ecological environment of Xizang, this experiment used the main cultivated variety Zangyou No.5 as the material, and adopted a random block design. Seven treatments were set up. Through field plot experiments, the effects of different pesticides on the control of rapeseed downy mildew, their safety, and yield were studied. The optimal control pesticide and application scheme were clarified. The results showed that there were significant differences in the efficacy, safety, and yield-increasing effects of different pesticides. Comprehensive analysis indicated that treatments A and B could be the preferred pesticides for controlling rapeseed downy mildew in Xizang. It was recommended that they be applied starting from the initial flowering stage, with a 7-day interval for two consecutive applications, and alternating use to delay the emergence of drug resistance. This experiment could provide technical support for the green disease control in the local area.

rapeseed downy mildew  /  control effect  /  output