Zheng Wanqing, fruit technician of the Zhuangfu Fruit Planting Professional Cooperative in Tianfu New District, Chengdu, Sichuan Province, reminded farmers that the prevention of walnut limb moths should seize the following period:

Dormancy period (November to February)

Clear Garden: Finely turn the tree tray, scrape off the old skin of the trunk to remove weeds and debris, burn it down, and turn the tree tray 20 cm deep. The area should be slightly larger than the projected area of ​​the crown.

Sprout, flowering, leaf development, fruit expansion (March to May)

Poisoning: Tree trays cover soil to prevent emergence of adult feathers, spray 2.5% of the enemy's killing cream 1500 to 2500 times, spray every 15 days or so, spray 3 to 4 times, or sprinkle 3% phoxim granules.

Flower bud differentiation and seed enrichment period (June - July)

(1) Prevention and control of adult light traps: During the adult emergence period (June-July), with the help of the phototaxis of adult moths of walnuts, blacklights are used to trap and kill adults. Chemical control: For walnut trees with high degree of shade, insecticides can be smoked and killed in adulthood (June-July).

Spray 15 times of 25% SCV wet powder 500 times or 2000 times SCX emulsion, 20% Sulfur Dimethoate 2000 times, or spray 50% SCI 500 to every 15 days. 1500 times liquid or enemy killed 3000 times liquid.

(2) Prevention and control of larval larvae hatching period is a suitable period for chemical control. The pesticide is 25% diflubenzuron, 3% hypertonic phenoxyoxadiol 2000 times, and 1.8% avermectin EC 500 times liquid to control larvae.

Pre-harvest, pre-harvest, and deciduous (August-October)

Remove insect fruit: From June to October, timely picking up the black fruit is deeply buried or burned to eliminate the fruit larvae, reduce the later black fruit, and reduce the overwintering population density. The anti-drug resistance of walnut limb moth is weak. In the prevention and control of (chemical) chemicals, it should be carried out in the early stage of the occurrence of the insect. It is advocated mainly by agricultural control, supplemented by physical control and chemical control, and promotes the use of bacteria to treat insects and take biological control measures. .

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