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Prevention of apple leaf spot defoliation
Recently, the continued high temperature, drought, the number of farmers to spray reduced, elongated interval, the choice of pesticides is not symptomatic, resulting in fruit spot brown spot, spread of the occurrence of spotted defoliation, the following talk about a number of prevention and control insights: 1, timely clean The garden is sprayed once before sprouting, and after the fruit is sprayed under the tree or in the red flower period, it means that the clear garden medicine must be sprayed twice. The effective medicine is: bactericidal excellent 1200-1500 times liquid, clear bright 1000-1200 times liquid, orchard Clear 1000 times liquid, Fuxing 8000 times liquid, followed by timely leaf cleaning, the source of bacteria out of the orchard, concentrated burned. 2. Strengthen management of deep or deep plowing of orchard soil, pay attention to fertilization and irrigation, strengthen investment of farmyard manure, and reasonably pruning (“great modification†combined with traditional cutting methods) to promote ventilation. 3, the diseased tree has been the management of the disease tree, tree 1:5 times the amino acid solution, or 1:4 of the "Union" compound Fertilizer solution, can also be combined spray spray amino acid fertilizer or humic acid fertilizer (such as "Jinong" humic acid foliar fertilizers will greatly enhance the tree vigor and promote the success of flowering in the coming year. 4, reasonable drug spraying, the previous period (from April to May, spray modern sterilization excellent 1200-1500 times liquid, agricultural resistance 120 800-1000 times liquid, polyoxin 600-800 times liquid, Gram-negative, Streptomyces Clear 800-1000 times liquid; middle and late (June-September) spray 3% oxygen oxygen 500 times liquid, Polaroid (polyoxine) 1200-1500 times or 10% Bao Kang 100-1500 times liquid, Can also spray complex state, replace manganese series, such as "spray grams" 800-1000 times, "agricultural song" 1200 times liquid, DuPont EPC 1200-1500 times, can also spray Shuangji pesticide plant "to be profit" 800 - 1000 times liquid 5. Prevention and control of "insect pests" to reduce the invasion and prevention of leaf leaf moth and lepidopteran pests, leaf-feeding pests, but also another effective way to prevent the disease, such as: leaf leaf moth on the harm symptoms, It is also the sensitive area of ​​repeated infection of spotted leaf disease. It must be controlled in time to reduce the base number of infection. Diflubenzuron is the control agent. For example, 2500-3000 times of avidiniluril suspension and Kangzhuang diurea 1500-2000. Double fluid, Diflubenzuron No. 3 overhang 2000 times. In short, to strengthen the management of tree integration, prevention, symptomatic remedy, select reliable agricultural products, Germs nipped in the bud, so that leaves green, good quality flower buds, fruit trees high rate of return, to prevent the disease from the root. (Dry County fruit tree service station)