What medicine works well for green worms on soybeans

Green worms on soybeansLice mite ureaIt works well.

Lice mite urea, mainly gastric toxicity, mainly kills pests by preventing the process of pest peeling, and after the agent enters the body of the pest, it will inhibit the larval epidermal chitin.

The synthesis of insects can not grow new skin, and eventually kills pests, especially for fruit trees and other leaf-eating caterpillars, which have excellent control effect on thrips.

Rust mites and whiteflies have a unique killing mechanism, which is suitable for the control of pests that are resistant to pyrethroid and organophosphorus pesticides.

Lice mite urea has a high degree of selectivity, very high activity on lepidopteran and homoptera pests, but for the natural enemies of pests and aquatic animals such as fish and shrimp, the lethality effect is relatively small, it is relatively safe for bees, and it is safe for crops.

Pesticide prevention and control precautions:

Pesticide prevention and control should be effectively mastered at a young age, which is the key to the success or failure of drug treatment. The spraying time should be before 9 a.m. and 4-5 p.m. or later, and the worms should come out to fight a little better. When spraying, it is necessary to pay attention to evenly and thoughtfully, and spray thoroughly at the same time as the ground near the rhizosphere of the plant to prevent the larvae from rolling to the ground from missing treatment.

There is no difference,There are dozens of species of bean worms, and the characteristics of growing on different plants are also very different, and the bean worms that grow on soybeans have economic value.

The larvae of the bean moth are commonly known as bean worms, bean dan, and bean cicadas, belonging to the genus Bean Moth of the subfamily of the Lepidopteran Mothaceae, and the growth cycle occurs in 1 generation (Hebei, Shandong, Jiangsu, Anhui) to 2 generations (Wuchang, Hubei, Nanchang, Jiangxi) in 1 year, mainly feeding on the leaves of soybeans, acacias, black locusts and honeysuckle and other plants.

Habits. There are 1 2 generations of bean moth per year, one generation in the Huanghuai River Basin, and 2 generations in the Yangtze River Basin and South China. The last instar larvae overwinter at a depth of 9 12 cm in the soil, and the wintering sites are mostly in the soybean fields and their nearby mounds, ridges and other sunny places.

Adults emerge at night and inhabit the middle of a leafy crop stalk during the day and begin to move in the evening. Strong flying power, can be used for long-distance high flying. It has a habit of eating nectar, and has a strong tropism to black lights.

Most of the eggs are scattered on the back of the leaves of the bean plant, and a few are laid on the front of the leaves and on the stems. Each leaf can lay 1 2 eggs.

Chlorantraniliprole, indoxacarb, avi, chlorantraniliprole, bollworm nuclear polyhedrovirus, sulfluramide, tetrachlorantraniliprole and other pesticides can be used for the control of green worms. Note that a single ingredient pesticide can not be used for a long time, and the alternating use of pesticides with different ingredients can reduce the resistance of pests to pesticides, and it is recommended to use pesticides during the incubation period of pests or when the insect age is small.

In the peak hatching period of green larvae, it is advisable to use 2000-4000 times of permethrin EC and 3000 times of 5% cis-permethrin EC.

You can also use 20% methrethrin EC 2000-2500 times liquid, or tetrabromothrin EC 5000-7500 times liquid spray. Spray once every 6-7 days, about 2-3 times in a row.

Because the tobacco green worm is a boring pest, it is necessary to seize the egg stage and the young larval stage (not yet bored into the fruit) to apply the pesticide, and it is best to use the insecticidal and eggicidal pepper high-yield cultivation agent.

At the peak of larval hatching, 2000 4000 times of permethrin EC, 3000 times of 5% cis-permethrin EC, or 20% methathrin EC 2000 2500 times, or 5000 7500 times of tetrabromothrin EC were used for spraying. Spray 1 time every 6 7 days, 2 3 times in a row. Stop using chemical pesticides 10 days before the first harvest of peppers.

Using biological agents, 50 100 grams of emulsifiable concentrate per 667 m2 can be sprayed on 50 liters of water. This method is the preferred biological control method because it can control the hazard without harming natural enemies and does not pollute the environment.

1. Mosquito coil insect control method. Light the mosquito coil, put it on the pot under the pest flower plant, and then cover it with a plastic film bag and the flower pot for about 1 hour to kill aphids, red spiders, whiteflies, etc.

2. Wind oil essence insecticidal method. Sprayed with 400 500 times of wind oil essence, it has a fumigation effect, penetrates into the body of the insect, and kills the pest. In particular, the control effect on waxy scale insects is good.

3. Mothballs (sanitary balls) insecticidal method. Crush mothballs and sprinkle them into the potting soil to kill pests that damage the root system in the soil. It has a special effect on peonies, dahlias, lilies, lycoris and other tubers, bulbs and fleshy root flower root nematodes.

4. Detergent insecticidal method. Spray with 500 times of dish soap, which can kill pests within 24 hours, and then spray water to reduce the quality of dish soap.

5. Color insect repellent method. Lay silver-grey mulch on the underside of the pot or hang silver-grey plastic tape over the plant to repel migratory winged aphids. You can also hang a yellow plate above the flower plant, and apply engine oil or petroleum jelly to the yellow board to attract female aphids to reduce the occurrence and prevent the spread of viruses.

6. Plant insect method. Interplanting onions, garlic, leeks, etc. in the potting soil under the flower plants releases volatile substances, which not only has the effect of repelling and killing aphids, but also has the effect of curing diseases.

Try spraying 1605 or 3911 emulsion with a sprayer, 10L of water mixed with 5-10ml of pesticides, and spraying onions.