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金冠苹果表皮的果锈和红色皮孔病变严重,直接影响果品质量。这两种病害的发生,除生理病毒病外,与喷布某种农药有关。通过分区试验和工作中长期观察了解到,在果树花前和花期喷布敌敌畏1000—1500倍或40％氧化乐果,对果树锈果病的发生起明显作用,特别是金冠品种。在果树开花前期即4月27日—29日喷敌敌畏,果树锈果病的发病率轻,约27％—30％,果品表面锈果面积约1/3.5月2日—4日喷40％氧化乐果锈果发病率特别严重,发病率约88％,果品表面锈果面积占全
Golden Delicious apple skin epidermal rust and red skin lesions are serious, a direct impact on the quality of fruit. The occurrence of these two diseases, in addition to physiological virus disease, and spraying a certain pesticide. Through the zoning test and long-term observation of the work, we know that spray spraying 1000-1500 times or 40% omethoate on the flower before and during flowering plays a significant role in the occurrence of fruit rust, especially the golden crown variety. Spraying dichlorvos from April 27 to April 29 in the early flowering period of fruit trees, the incidence rate of fruit tree rusts is light, about 27% -30%, and the surface area of rusty fruit is about 1/3. Spraying 40% on May 2-4 The prevalence of dimethoate is particularly serious, the incidence rate of about 88%, the surface area of fruit rust accounted for the whole