How to prevent tree pests in winter

Preventing tree pests in winter can eliminate overwintering pests and eggs and reduce pests in the coming year. The specific methods are as follows: 1. Remove the deciduous trees after the beginning of winter and gradually defoliate, remove fallen leaves and weeds, and burn and bury them in a centralized manner to reduce the source of insects. 2. Cut off the larvae and combine the trees to build the pruning branches, remove the worm-bearing twigs and dead branches, remove the worms, remove the dead trees, and eliminate the overwintering eggs. 3, trunk coated with lime 5 kg of lime, sulfur 0.5 kg, 20 kg of water dubbed a whitening agent, brushing the trunk, can effectively kill the insects hidden in the cracks in the bark. 4, drug control sprayed on the branches of 3 to 5 Baume degrees lime sulfur, can kill aphids, aphids, aphids and other overwintering pests. For boreal larvae that bore into trunks of trees, 80% dichlorvos EC or 40% omethoate EC may be used 5 to 10 times, soaked in cotton balls or cloths, stuffed into boreholes, and plugged with wet mud, also better The control effect.

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