How to prevent and control the ground tiger?

The ground tiger, also known as root cutter, night burglar, ground silkworm, soil silkworm, etc., belongs to the family Noctuidae. There are about 1600 species in China, with well-developed adult mouthparts, polyphagous crop pests and more than 10 species of agricultural crops that cause harm. Among them, small field tiger, yellow land tiger, land tiger, white land tiger and police grain land tiger are particularly important. Let's take a look at how to control the land tiger.

The living habits of the ground tiger

The phototaxis and chemotaxis of ground tiger adults vary with insect species. Small land tiger, yellow land tiger and white land tiger all have a tendency to black light, and small land tiger has the strongest tendency to sugar, wine and vinegar. Yellow tiger likes to feed on the stamens of green onions as supplementary nutrition. Eggs are mostly laid on the soil surface, on the young stems and leaves of plants and on the rhizosphere of subtilis, scattered or heaped. The larvae before the 3rd instar are mostly active on the soil surface or plants, and feed on leaves, heart leaves, tender heads, buds and other parts day and night. Scattered into the soil after 3 years old, latent soil during the day, nocturnal activities do harm, often bite off crop seedlings on the ground, resulting in lack of seedlings, broken ridges, and self-harm.

Harmful characteristics of ground tiger

The ground tiger is one of the polyphagous crop pests, causing damage to more than 10 species of crops, all of which harm the stems of Fritillaria thunbergii with larvae, often biting off the stems from the surface and killing the plants, resulting in lack of seedlings and broken strips. Its main hosts and harmful crops are corn, sorghum, wheat, potatoes, beans, hemp, tobacco, rape, melons and many kinds of vegetables, and many kinds of weeds are also one of the important hosts of ground tigers. The seedlings of vegetables are also often damaged.

How to prevent and control the ground tiger?

1. Paulownia leaf trapping method: the ground tiger larva has a tendency to paulownia leaves. The older paulownia leaves can be taken and soaked in clean water, and then put in the field in the evening, 80 to 120 pieces per mu, and the leaves are opened the next morning to catch the larvae. If the paulownia leaves are first soaked in 150 times of 90% crystal trichlorfon solution, and then put in the field, the ground tiger larvae can be killed directly, and the effect can last about 7 days.

2. Poison bait: take 1 kg of 90% crystal trichlorfon, first dissolve it in a small amount of hot water, then add 10 kg of water, spray evenly on 100 kg of fried cake powder or wheat bran, mix well and sprinkle it on the root of the crop in the evening. Use about 5 kg per mu to control the ground tiger.

2. Trapping and killing of sugar and vinegar: the preparation method of sugar and vinegar is 6 parts of sugar, 3 parts of vinegar, 1 part of liquor, 10 parts of water and 1 part of 50% diazinophos, and traps are carried out during the occurrence of adults. Some fermented and sour foods, such as sweet potatoes, carrots, rotten fruits and so on, can also be trapped and killed by adding appropriate amount of chemicals.

4. Artificial capture: making use of the habit of the ground tiger lying in the day and going out at night, dig out the ground tiger and kill it early in the morning on the ground around the killed crops with a small spade or stick.

5. The method of irrigation and killing: for the nursery that can be irrigated for a short time, if the nursery is watered for 1-2 days, most of the tigers can be drowned, or forced to flee and be hunted manually.

6. Black light trapping: ground tiger adults have a strong phototaxis. Sweet and sour liquid combined with black light can achieve a good trapping effect when used in a clear, breezy and moonless night. Put a basin of water in the black light, put pesticides in the water, or pour a layer of waste oil, it also has a good killing effect.

7. The method of hoeing and killing eggs: the hatching rate of eggs can be greatly reduced by hoeing and ploughing in time from the time the tiger lays eggs to the peak period of hatching.

8. The method of stacking grass and trapping: after the 3rd instar, the resistance of ground tiger larvae is enhanced, and it is difficult to get the expected effect by spraying on the ground. Can be used to pile grass trapping, that is, evenly stacked fresh grass in the field in the evening, put 80 million stacks per mu, with an area of 0.1 square meters per mu, open the haystack early the next morning and kill larvae for 5-7 days in a row, most of the larvae can be killed. The haystack is generally changed every 3-4 days, and a little water can be thrown after the sun dries up to improve the trapping effect.

9. Chemical prevention and treatment: during the 1st and 3rd instar larvae, 2000 times of 50% diazinon EC and 1500 times of 20% fenvalerate EC were sprayed on the surface.