The rough upturned skin of fruit trees often hides a variety of diseases, such as hawthorn red spiders, star caterpillars, small leaf curls, rot diseases, etc. After the end of winter shearing, from mid-February onwards, focus on checking the trunk, branches, and shearing mouth for rot disease, and then apply Baume 10 degree stone sulfur mixture to "Tree Protection General" 100 times liquid, and apply it again half a month later. Coating the affected area of the tree disease can quickly form a protective film, suffocating to kill the bacteria, by using a brush to apply emulsion, and then spraying the trunk and branches of the whole garden with 100 times the emulsion of the tree general (50 kg) to disinfect the whole garden, which can hinder the decay virus from landing on the tree and multiplying, and the skin infected with dead spores begins to fall off after 30 days, and the "tree protection general" can also be mixed and used with various pesticides or foliar fertilizers.
Brown spot
Pharmaceutical prevention and control should be grasped in three periods, that is, after the flower falls (half a month before the onset of the disease), before the rainy season and timely spraying prevention and control during the rainy season. Spray 1:3:200 lime multi-volume Bordeaux liquid + melon fruit Zhuangtilin in the early stage of growth, and spray in the later stage, you can also use 50% sterilization 600 times, 50% carbendazim 800 times, 50% methyltobutazine 1000 times, 65% daisen zinc 500 times + melon fruit Zhuang Tiling for prevention and control. When spraying in the rainy season, 2000-3000 times the adhesive should be mixed. Early defoliation disease of apples is mainly manifested as the mixed invasion of brown spots and gray broils, and it is also essential to strengthen soil and fertilizer water management and improve tree disease resistance.
Spotted defoliation disease
Spotted defoliation disease generally begins in late June, and the peak period is from late July to early August. Spring rain has early onset and early onset, and autumn rain is more serious. It stopped happening in early October. Prevention and control of apple spot defoliation disease, should pay attention to chemical control, starting from after flowering, continuous spray 50% prohydantoin wettable powder 1000 times + melon fruit Zhuang Tiling or 70% manganese zinc wettable powder 500 times + melon fruit Zhuang Tiling, or 10% polyoxymycin 1200 times + melon fruit Zhuang Tiling, or 40% ethyl phosphorus aluminum 200 times + melon fruit Zhuang Tiling, or 70% acemanganese 500 times + melon fruit Zhuang Tiling. Lime multi-volume Bordeaux liquid also has a good control effect. At present, it has entered the mid-autumn season, and all kinds of early defoliation diseases will gradually stop new infections. However, for orchards with more serious disease, the leaves of the orchard should be cleaned in time, the diseased branches should be cut off, and the disease should be buried in a concentrated manner to eliminate the source of the disease and reduce the morbidity.
