Prevention of peach fruit borer

There are more and more peach trees planted in our province. The peach borer is an important pest of peach trees. The worm occurs one to two generations a year. The old mature larvae are flat round crickets and are about 5 cm below the top soil in the tree tray. Wintering. The overwintering larvae began to unearth in May of the following year. Adults began to appear in mid-June. Adults appeared in mid-July and late August and early September. After adult emergence, eggs can be laid for 2-3 days, and hatching of the eggs for a week or so will damage the larvae. The emergence of a large number of overwintering larvae and emergence of the peak is the critical period of prevention and control.

Forecast

Cage forecasting. In the autumn, 500 larvae were collected, and they were buckled in a tree tray with a cage. Observations of excavation, pupa, and eclosion began in late May of the following year. Ordinary larvae can be unearthed on the ground for 3 consecutive days. Adult eclosion continued to increase 5-7 days can fight drugs on the tree.

Sex Trap. Peach sex hormones were hung in tree shrews to observe adult occurrence. Method: Use a bowl or bowl to hold the detergent powder, keep the water 2 centimeters away from the basin mouth, and hang the lure with iron wire and hang it on the basin mouth (that is, about 2 centimeters from the water surface), and investigate the peach adult insects in the basin once a day. , Cleared after the record. If adults continue to emerge and increase by 5-7 days, they can fight drugs.

Ground control

dig. Tumble earth pressure tree disk, eliminate overwintering larvae.

Sprinkle medicine on the ground. At the beginning of June, the larvae were unearthed. The mature pear trees were each 0.25 kg of phoxim powder in the tree tray, and they were scattered after being scattered. If you spread evenly, you can do it once.

Spray the tree. The number and time of spraying are mainly determined based on the previous year's insect situation and forecast. If the rate of fruiting is high in the previous year, spray 4-5 times during the adult period and spray once every 10-15 days. The spray type is 25% diflubenzuron III suspension 1500-2000 times, 30% peach Xiaoling 2000 times, 20% cypermethrin 2000 times, 5% beta-cypermethrin 2000 times, 2.5% Kung Fu EC 4000 times and so on. One month before the harvest, the drug was stopped.

Manual removal. Before the larvae are de-fruited, the insects are harvested and the insects are collected and destroyed.

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