The summer heat season is a crucial period for the results of walnut management. This period of fertilizer and water management, pruning and pest control work is an important link in the production of the year and the coming year. From July to late August, this period is full of walnut kernels. The fat content and weight of the nuts increase rapidly, the moisture content decreases, and the quality increases. The flower buds continue to differentiate and require considerable nutrient supply. Therefore, it is tube.
Fertilizer should be applied to walnut trees in summer. Each tree should be treated with nitrogen fertilizer (urea, ammonium bicarbonate or ammonium sulfate) 100 to 500 grams, and cover soil after application. Can also be based on walnut flowering results in the flowering, young fruit, fruit enlargement fertilizer, spray a new high-fat membrane + strong fruit Tiling, etc., increase the amount of nutrient delivery, flower protection, strong fruit, promote fruit enlargement, anti-dropping fruit .
Pruning the growing season for pruning, after pruning leaves can not be pruned, otherwise it is easy to cause injury, affecting the growth of the tree. When pruning, pay attention to cut back fork branches, oblique branches, overlapping branches, pests and branches, which will help reduce nutrient consumption. The results of the poor ventilation of the internal hemorrhoids, walnut trees, but also pay attention to the timely removal of intrinsic useless techniques, thin skills, dense branches. Do not cut loose branches too much, so as not to cause excessive wounds, resulting in debilitating tree vigor.
Pests and Diseases Prevention and control of walnut black spot, anthrax occur sooner or later and the severity, and is closely related to the year high temperature and drought and frequent rainfall, to pay close attention to. The tree can be sprayed with 50% methyl thiocyan or 40% TU wettable powder 600-800 times, sprayed every 10 days, and sprayed twice in succession. In the high pest period of walnut infestation, 2000 times of parathion-emulsion emulsion or 20% of 30% extinction can be sprayed on the trees. Assassination, killing of beetle, beetle, and silk moth can be used to trap adult insects; when the pests are severe, 30% of the insects can be used for prevention and control.
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