How to prevent and control ground tigers is related to living habits.

Earth tigers like to feed on onion stamens to supplement nutrition. Eggs are mostly produced on soil surface, plant stems and leaves, etc. Adults are distributed in the soil, active at night and feed on the seedlings and roots of crops. The ground tiger often bites off the stems on the surface to kill plants. Its main crops are corn and sorghum. The cutworm larvae have a tendency to paulownia leaves, which can be lured by paulownia leaves, killed manually, or killed by poison bait, black light and chemical control.

First, the living habits of the native tiger

The phototaxis and chemotaxis of adult cutworm are different with insect species. The cutworm, yellow cutworm and white-edged cutworm tend to be black, and the sweet and sour solution is the strongest. Gecko likes to feed on onion stamens to supplement nutrition. Eggs are mostly produced on the surface of soil, between the tender stems and leaves of plants and the roots of hay, scattered or piled up. Before the 3rd instar, the larvae mostly move on the soil surface and plants, and feed on leaves, heart leaves, tender heads and buds day and night, with little food intake. After the third instar, it is scattered in the soil, lurking in the soil during the day and harmful at night. It often bites off crop seedlings together with the ground level, resulting in lack of seedlings and broken ridges, resulting in self-harm.

Second, the harm characteristics of the ground tiger

The cutworm is one of the pests of omnivorous crops, and there are more than 10 kinds of crops, all of which harm the aboveground stems of Fritillaria with larvae. Stems are often bitten off the surface, leading to plant death, seedling shortage and broken strips. The main host and damaged crops are corn, sorghum, wheat, potatoes, beans, hemp, tobacco, rape, melons and many vegetables.

Third, how to prevent and control tigers on the ground

1. Method of trapping and killing paulownia leaves: The cutworm larvae are easy to feed on paulownia leaves. You can take paulownia leaves, soak them in clear water, and put them in the ground at night, with 80~ 120 leaves per mu. The next morning, the leaves were opened to catch larvae, and the effect was very good. Paulownia leaves soaked in 90% solution of 150 times crystal trichlorfon can directly kill tiger larvae in the field, and the efficacy can last for about 7 days.

2. Poison bait trapping method: take 90% crystal trichlorfon 1 kg, dissolve it with a little hot water, add water 10 kg, spray 100 kg of fried sweet cake powder and wheat bran evenly, and spread it on the roots of crops along the ridge in the evening after mixing, about 5 kg per mu, which has a good control effect on cutworms.

3. Sweet and sour solution trapping method: The sweet and sour solution is prepared by 6 parts of sugar, 3 parts of vinegar, 0/part of liquor/kloc-0, 0/part of water/kloc-0, and 50% diazinon 1 part, which is trapped and killed in the adult stage. Some fermented sour foods, such as sweet potatoes, carrots, rotten fruits, etc. Can also be used to trap and kill adults.

4. Artificial capture method: Using the habit that tigers lie down during the day and come out at night, dig out tigers on the ground around damaged crops in the morning with shovels and sticks and kill them.

5. Irrigation and drowning method: For fields that can be irrigated for a short time, when a large number of land tigers occur, most land tigers can be drowned by irrigation for 1~2 days, or forced to escape and be killed manually.

6. Black light trapping method: Eupolyphaga Seu Steleophaga adults have strong phototaxis, and good trapping effect can be obtained by combining sweet and sour liquid with black light and using it in sunny, breezy and moonless nights. Putting a pot under the black light, putting pesticides in the water and pouring waste oil can also kill.

7. Weeding and egg killing method: weeding and intertillage in time can greatly reduce the hatching rate of eggs from the time when tigers lay eggs to the peak of incubation.

8. Trapping method by stacking grass: After the 3rd instar, the drug resistance increases, and it is difficult to achieve the expected effect by ground spraying. Trapping by stacking grass, that is, 80~ 100 stacking grass evenly at night, with an area of 0. 1 m2. The next morning, the haystack was opened to kill the larvae, and most of them were killed for 5~7 days. Haystacks are usually replaced every 3~4 days, and a little water can be poured after drying, which can improve the trapping effect.

9. Chemical control method: In the larval stage of 1~3, spray 2000 times of fenvalerate 20% EC and 1500 times of EC on the surface.