Three-pronged anti-walnut hedgehog

The yellow-spotted moths occur once a year in the walnut garden. After the autumn, the mature larvae often branch off in the branches, and the stems and even the leaves of the larvae are hard to survive. Larvae endanger from late June to August. The young larvae feed on the leaves of the back of the leaves, making the leaves mesh like; the larvae are dispersed after the larvae grow up, eating the leaves into missing dentate, leaving only the main veins and petioles. Prevention methods are as follows:

When the chemical agent controls the severe occurrence of yellow thorn moth, it can be sprayed with 500 times solution of Bacillus thuringiensis, or 20% of 2000 times solution of leprosy emulsion.

Bio-control 1 Use the natural enemies such as the scorpion bees and the Shanghai blue bee to suppress the yellow-spotted moth. On the upper end of the parasitized yellow thorn moth, there is a small hole left by the parasitoid when it lays eggs and it is easy to identify. 2 Use adult phototaxis and use blacklight to trap adult insects. 3 During the larval period, spores of 0.5 million/ml of spores were sprayed.

Manually control the larvae before the third instar and use the larvae to remove the larvae in time. Since the larvae have poisonous hair, contact with the skin should be avoided. Thorn moth sticks to the stem and can be cut with a pruning shear.

Oat Powder

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