Scab: In the middle and lower reaches of the Yangtze River and Huanghuai and other perennial disease-endemic areas, on the basis of strengthening the cultivation and management of wheat in the middle and late stages of growth, we should seize the critical period of wheat heading and flowering, actively prevent it, spray medicine when it is in bloom, and curb the epidemic of the disease; Sensitive species, if the weather forecast has cloudy rain, condensation and foggy weather during the flowering period, the first spraying time should be advanced to the heading period; the pesticide species can be Bacillus subtilis, Jinggang Cereus, cyprostrobin, prothiobacter For azoles, fluconazole, tebuconazole, prochloraz, propazole-tebuconazole, cyanene-tebuconazole, etc., use sufficient amount of liquid medicine, and if it rains within 3-6 hours after application, rain After that, it should be treated in time; if the heading and flowering period encounters continuous cloudy and rainy weather suitable for the prevalence of the disease, it is necessary to use medicines for 1-2 times every 5-7 days to ensure the control effect. In areas with high levels of carbendazim resistance, the use of benzodiazepines such as carbendazim and thiophanate-methyl should be stopped, and drug rotation and combination drugs should be advocated. In areas where scab occurs occasionally, it can be combined with other diseases and insect pests to be treated during the heading and flowering stage.
Aphid: When the number of aphids in the field reaches more than 800 and the ratio of benefit to harm (natural enemies: aphids) is lower than 1:150, acetamiprid, imidacloprid, pirimicarb, lambda-cyhalothrin, bitter Spray control of ginseng, ear mold and other agents. In areas where conditions permit, the release of natural enemy insects such as aphid wasps is advocated for biological control.
Rice planthopper: Biopesticides such as Metarhizium anisopliae CQMa421, Beauveria bassiana, matrine, etc. and etofenprox, nitenpyram, pymetrozine, dinotefuran, flonicamid, and triflunifen are preferred. Chemical agents with high efficiency and low ecological risk such as pyrimidine.