What are the pollution-free control methods for the jujube looper moth?
The control principle is to make use of its characteristics of overwintering under the tree and the wingless female moth, strengthen control efforts under the tree, and eliminate or stop the female moths from climbing the tree to lay eggs. Large-scale control can reduce the insect population by 80%-90%. On this basis, to eliminate the larvae that slip through the net on the tree, pollution-free pesticides can be used for control.
1. Artificial pupa digging. Before the adults emerge in spring, turn the soil within 1 m around the tree and 15 cm deep to dig out pupae, collect the pupa clumps and dispose of them in a centralized manner. You can also deep-plow the tree in autumn to destroy its overwintering sites so that it cannot overwinter safely.
2. Suppress emergence from the soil. Before the adults emerge from the soil, cover the tree with 30 cm of soil, which can reduce the number of adults emerging.
3. Prevent female moths from climbing the tree. In early to mid-March, wrap a smooth plastic film band or tree skirt around the smooth part of the trunk to prevent female moths from climbing the tree, and manually catch the moths early and late. Specific method: wrap plastic film 10 cm wide around the trunk, overlapping the joint by 3 cm, and fix it with staples or tape. For the tree skirt, tie 15 to 20 cm wide plastic sheeting in one band each at 5-20 cm from the upper edge and at the lower edge, overlap the joint by 5 cm, then turn the upper end of the plastic sheeting down into a skirt shape, and seal the joint tightly with tape. The plastic film is required to fit tightly against the trunk with no gaps.
4. Apply an insect-sticking pesticide band. Mix butter, machine oil, and 1605 emulsifiable concentrate in a ratio of 10:5:1 into a paste, and apply it on the plastic film or along the lower edge of the tree skirt to form an insect-sticking pesticide band, increasing the difficulty for female moths to climb the tree and preventing larvae hatching under the tree from climbing up. Apply it twice during the entire emergence period.
5. Straw rope to attract eggs. According to its egg-laying habits, tie 2 loops of straw rope under the plastic film band or under the tree skirt to attract female moths to lay eggs, replace the straw rope once every half month, and burn it in a centralized manner, replacing the straw rope 3 times in total, and when replacing the straw rope, scrape off the egg masses in the cracks of the rough bark.
6. Application of pollution-free pesticides. Before the larvae reach the 3rd instar, spray the tree with 500 to 800 times dilution of Bacillus thuringiensis var. aizawai, 400-700 times dilution of Bacillus thuringiensis, and 1500-2000 times dilution of 25% diflubenzuron No. 3 suspension concentrate, spraying 2-3 times every 7-10 days to control the larvae that climb the tree.