Citrus powder control techniques
Citrus meal, mainly harmful to spring and summer shoots, induces soot disease, causing dry shoots, and the fruit grows slowly, causing it to fall off. According to the occurrence and harm characteristics of citrus black thorn, the pest control measures should be taken. Agricultural control is the foundation, chemical control is the key, and prevention and prevention is the guarantee.
Grab the adult and 1-2 nymphs during the prolonged period of use. When spraying pesticides , in addition to focusing on the inner iliac and leaf back of the canopy, it is also necessary to pay attention to the prevention and control of weeds and fences in the orchard, in order to completely and effectively eliminate the harm of black thorn and its induced soot.
1. Combine citrus winter and spring pruning, cut off dense branches and pests, improve ventilation and light transmission conditions, and reduce overwintering insect sources;
2. Timely eradicating weeds in orchards and trimming fences, artificially destroying places where pests inhabit;
3. Strengthen the management of fertilizer and water, rationally dilute the plant, and enhance the resistance of the tree;
4. Strengthen the forecasting and forecasting work of black thorns, and organize the joint defense and prevention in a timely manner;
5, chemical control: take the method of first treatment of insects, the generation of adults in the prosperous period, spraying 90% of the enemy white 800-1000 times liquid or 40% omethoate 1000 times in the morning or evening; each generation of nymphs Spraying (1) rosin mixture 15-20 times solution in the prosperous period; (2) 40% speed rushing 1500 times solution; (3) 2.5% powder 虱 1500 times solution; (4) speed 蚧 1000 1000- Spray 1500 times for 5-7 days, 2-3 times in a row. On the basis of completely eliminating pests, use 50% carbendazim WP 800-1000 times solution or 70% thiophanate-methyl WP 800 times solution for 2 times to kill the soot. After a period of wind and rain, the black mold layer is dry and detached, and the tree body can resume normal growth and development.
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