Pollution-free control of jujube inchworm

The principle of control is to make use of the characteristics of overwintering under the tree and no wings of the female moth to strengthen the control under the tree to eliminate or stop the female moth from laying eggs on the tree. Large area control can reduce the number of insects by 80% to 90%. On the basis, pollution-free pesticides can be used to eliminate leakage larvae on trees.

1. Digging pupae manually. Before the emergence of adults in spring, the pupae were dug up in the soil layer around the tree with a depth of 1 meter and a depth of 15 centimeters, and pupa blocks were collected for centralized treatment. It can also turn over the tree plate deeply in autumn to destroy its overwintering place and make it unable to survive the winter safely.

2. Inhibition of unearthing. Before the adults are unearthed, the tree plate is covered with 30 cm thick soil, which can reduce the number of adults unearthed.

3. Stop the female moth from climbing the tree. In the first and middle of March, a smooth plastic film belt or tree skirt was wrapped around the smooth trunk to prevent the female from catching the moth manually sooner or later. Specific practice: wrap the plastic film with a width of 10 cm on the tree trunk, overlap 3 cm at the joint, and secure it with staples or tape. The tree skirt is to tie the plastic sheet 15 to 20 centimeters wide at the lower edge of 5 to 20 centimeters away from the upper edge, overlap the joint by 5 centimeters, and then turn the upper plastic sheet into a skirt, and seal the interface with adhesive tape. The plastic film is required to stick to the tree trunk without leaving any space.

4. Smear the insect medicine belt. Butter, oil and 1605 EC were mixed into a paste at 10:5:1 and coated on the plastic film or the lower edge of the tree skirt to form an insect-infested medicine belt, which made it more difficult for the female to go up the tree and prevent the hatched larvae from going up the tree. Apply twice during the whole Eclosion period.

5. Grass rope to induce eggs. According to the spawning habit, tie the grass rope 2 times under the plastic film belt or under the tree skirt to attract the female to lay eggs, change the grass rope once every half month, burn it centrally, change the grass rope for 3 times, and scrape off the rough sewn eggs when changing the grass rope.

6. Application of pollution-free pesticides. Before the 3rd instar of the larvae, the trees were sprayed with 500 to 800 times of Bacillus thuringiensis, 700 times of Bacillus thuringiensis, 1500 Mel 2000 times of 25% diflubenzuron 3 suspension, and 3 times of spraying 2 Mel every 10 days to control the larvae on the trees.