Prevention and control of soybean yellow moth

1, living habits Yellow moth adult moth is white, scattered many black spots in the front wing. Yellow-bellied moths occur in one place every year for 1 generation, and they spend the winter in the eels, and they become adults in the early June of the following year. The first generation of larvae occurred in mid-to-late June. The newly hatched larval population was infested, and dispersed slightly later. The larvae have a false death, and immediately after being disturbed, they burrow into the earth seams or under the grass trees to hide. Larvae damage the crop leaves and even the young stems are eaten, causing serious damage when they occur. 2. Prevention and control methods During the prevention and control of the larvae, attention should be paid to the timely prevention and control of the larvae at the young age. Spray the pesticides when the larvae are active in the morning and evening. The specific methods are as follows: 1 Install black light traps to kill adult worms, and have the characteristics of phototaxis for yellow moth adults. Black light was installed to trap adult insects to reduce the amount of eggs laid by adults. 2 Carry out autumn deep turning to destroy the place where the yellow moth is wintering and reduce the source of insects. 3 Remove the weeds in the affected fields in time, or dig trenches to prevent the transfer. When larvae are found to migrate to the fields, they can dig trenches around the fields and sprinkle some pesticides to kill the larvae. 4 Pharmacy control, when it occurs, it can spray 2.5% trichlorfon powder or 5% carbaryl powder, and use 22.5-30 kilograms per hectare; also use 50% phoxim 800 to 1000 times spray. When the larvae age is large, 90% crystals of trichlorfon can be sprayed with 1000 to 1500 times of liquid, with 375-450 kg of liquid per hectare.

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