Pests and diseases often severely weaken the tree vigor, and the leaves fall off early. After being affected by pests and diseases on the fruit surface, it affects fruit quality. In recent years, fruit growers used bagging technology, but improper bagging can also cause many diseases. Therefore, how to wrap the bag and ensure the quality of the bagged apple is one of the keys to fruit production. First, germination to the first time before flowering medication During the long spring raid, the spring shoots grow rapidly, and the germs are most likely to invade the shoots. As temperature rises, powdery mildew, root rot and various locusts and acarids begin to move. The diseased shoots should be promptly cut off, and 10% imidacloprid wettable powder spray should be used to prevent and treat pests such as cotton aphid and ticks. The whole garden can be sprayed with a “General Tree Guard†+ Bordeaux mixture to kill overwintering pests and insults. Second, flowering is best not to use drugs Apples are sensitive to pesticides during flowering, and generally cannot spray chemical agents during flowering to avoid injury. In order to prevent falling flowers and fruit, the production of artificial bees, to improve the pollination rate, and promote results. Third, after the flowering For pests that may cause harm during the flowering period, such as apple powdery mildew, flower rot, mold heart disease, scale insects, and mite pests, measures should be taken promptly after flowering. The use of 80% tebuconazole WP to control all kinds of leaf spot disease, scab, anthrax and other high-level fungal diseases; for scale insects, cockroaches and other pests, 40% omethoate can be used to control. IV. Spraying before bagging Spraying before bagging is a critical period. This is the period of young fruit defluff, and a large number of wounds are produced after the fluff has fallen off. This brings opportunities for the invasion of pathogens such as anthrax and ringworm. Therefore, 1 or 2 days before bagging, the whole garden sprayed fungicide and insecticide again to prevent diseases such as rotten fruit, cotton bollworm, and fleas. Drugs include 70% thiophanate-methyl 800 times, 12% hypertonic extermination net emulsifiable concentrate and so on. Do not use organic phosphorus and Bordeaux mixture to prevent fruit rust. Fifth, after spraying bagged leaf After bagging, we must carefully protect the leaves so as to make the fruit large, high quality and colorful. Early defoliation, powdery mildew, red-and-white spiders, aphids, leaf miners, etc. are the enemy of damage to the leaves. Therefore, after spraying the bag, “melon and fruit sedum†+ foliar fertilizer + fungicides + pesticides should be prevented. The threat of pests and diseases, nutritional supplements, and promotion of fruit enlargement. Six, take medicine after bag extraction Many growers are accustomed to the idea that fruit bagging is not necessary after bag removal and is the most easily overlooked period. After the bag is picked, the fruit is exposed and the fruit grows on the tree for another 20-30 days. The bacteria will invade the wound caused by the slight friction between the branches or the leaves and the fruit, which will cause pests and diseases on the fruit surface. Should seize the time to spray again, "new high-fat film" + insecticide + fungicide + foliar fertilizer, disease prevention and pest control, to reduce the occurrence of bitter pit disease, prevent cracking, protect the fruit color bright. 7. After spraying fruit, Qingyuan Sprays With the fruit harvesting, the leaves fall off and the fruit trees begin to enter dormancy. The pests are also looking for overwintering sites for wintering, and this is also the weakest link in their life history. At this time, the clean garden work cannot be relaxed. For branch diseases such as apple rot disease, bobbin disease, and canker disease, apply the “General Tree Guard†seal to disinfect after removing the lesion. The litter in the orchard will be treated with concentrated litter and fruit drop, and then the whole tree will be sprayed with the “General Tree Guardian†+ lime sulfur mixture to prevent freezing and keep the fruit trees safely in winter. In short, during the year-round management of fruit trees, each medication period is critical, one of which is not well-controlled, and the next one is very laborious. Therefore, the fruit grower should strengthen all aspects of bagging apple management, improve the commodity quality of the fruit, and buy a good price.
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