In August, the apple tree entered the peak of autumn growth. The management of this month will focus on strengthening nutrient supply, controlling the growth of autumn shoots, taking various pruning measures, ensuring the normal growth of the leaves, promoting rapid fruit enlargement, and promoting the fullness of flower buds, preventing Pre-harvest fruit varieties were harvested and pest control was strengthened to ensure a bumper harvest this year. The technical measures are separately introduced as follows.
1. Strengthen nutrient supply. In particular, apple trees with yellow leaves, uneven leaves, and improperly colored leaves, yellow leaves, and foliar edges should strengthen nutrient supply. 1 leaf spray fertilizer. With quick-supplementation of boron-molybdenum-magnesium-zinc-calcium amino acid nutritional liquid fertilizer 300 times or potassium fulvate 600 times, spraying once every 10 to 15 days, can be mixed with pesticides. 2 top dressing. August is the period of fruit enlargement. It is necessary to top-dress trees that bear more fruit and promote rapid fruit enlargement. The main use of phosphorus and potash fertilizers is to apply high-potassium and low-nitrogen type fruit trees for 1.5-2 kg or to recover yellow in each mature tree. Potassium fulvic acid 5 to 6 two. 3 trunk fertilizer. With quick supplement - boron, molybdenum, magnesium, zinc, calcium amino acid nutrient liquid fertilizer 2 to 3 times the liquid, the weak tree, the results of many trees, leaves dry trunk trees, can play a fertilizer effect.
2. Tree-trend regulation. For those trees that are less prosperous and fruitful, in early August, spray PBOG or PBO control agent 200 times, paclobutrazol 150 times, focus on new shoots, control the new shoot long, and promote fruit enlargement and coloring. After 4 pm, the spray effect is good.
3. Summer and autumn trim. Focusing on the work of clearing, removing the leggy branches in the tree branches and cutting the long strips at the slashing mouth, and at the same time eliminating or retracting the fruitless branches that affect the air and light of the trees, and they are invalid for the dense lower part of the canopy. Branches must be removed.
4. Ripening fruit before harvesting. Such as the Beidou, Hongxing, Chaohong, Shouhong, Marshal series of varieties easily before the fruit drop, in August sprayed 1-2 times naphthalene acetic acid 40ppm (20% naphthaleneacetic acid 5g water 30 to 40 kg) to spray fruit Mainly at the handle, both wind and shake the fruit and promote fruit coloring.
5. Strengthen pest control. Focus on the prevention and treatment of early defoliation. In case of bad weather spraying, but the bacteria infection is rapid, quick-acting pesticides such as Type 9281 can be used for prevention and control. After spraying, as long as the agent can dry and absorb on the leaves, it can play a very good bactericidal effect. This type of drug can be used quickly but its efficacy is about 7 days. After sunny days, it can spray long-acting drugs such as bacteriochlorin, bactericidal, polyoxin and other pollution-free pesticides.
6. Pay attention to flood control and weeding. In rainy years, after raining, drain water in time. Black clay orchards should pay attention to soil planning, and do not cause roots to fall. Weeds and more orchards timely weeding, can be cut down pressure Qing Fei Fei. Chemical herbicides can also be used for weed control, with 30 times glyphosate (eliminate perennial weeds) plus 1,000 times the king to help kill or 300 times the detergent, or use 300 grams of a trace of no trace to help kill the king 1000 times, Speed ​​kill weeding.
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