Spodoptera litura, how to use the medicine when planting Chinese cabbage?

After the vegetables are harvested, pupa is exterminated. Sweet and sour liquid, black light, or poplar branches are dipped in 500 times the liquid of trichlorfon to trap and kill adults. Removal of egg masses, or "screen leaves" of clusters of hatchling larvae that have not yet dispersed the damage.

Pesticide control: master the pesticide control before the larvae are dispersed. 80% dichlorvos EC or 90% trichlorfon 1 000 times solution can be used; or 40% acemethamidophos 1 000 times; 5% Stuck Gram or 5% Nongmengte or 5% Suppressant Taibao, all of which were 5 000 times liquid; or 25% chlorpyramide 3 1 000 times solution; or 40% chrysanthemum or chrysanthemum emulsifiable concentrate 2 000 3 000 times liquid; or 21% killed; or Kung Fu emulsion 5 000 times liquid spray.

Commonly used agents: acemethamidophos, dichlorvos, Nongmengte, Kazek, antibiotic, chlorpyramide.

In addition to keeping the field clean and using the phototaxis of Spodoptera liturae to kill pests, you can also use drugs to control Spodoptera litura. For the 1-2 instar larvae for drug control effect is better, in terms of drugs, a variety of drugs can be used alternately to apply the method, 10% to remove (mitenile) suspension 1500 times, to remove (methylaminoavermectin) emulsifiable concentrate 1500 times, or 1% matrine soluble liquid 800 1200 times spray control. Spodoptera litura, which generally eats away at the young leaves of the plant at night, so it is recommended to choose the time of spraying at 4-5 p.m., if it is too early to achieve the best effect, and spraying late will not be effective due to dew factors.

You should buy some insecticides to spray on top of the Chinese cabbage, but the amount should not be too much, just spray some, so that the insect infestation can be alleviated, thereby increasing the yield of the cabbage.

You can go to a pesticide store and buy the right pesticides to remove pests, or use natural enemies, fungi and bacteria to control pests.

The planted Chinese cabbage has Spodoptera litura, for this medicine, we mainly use some insecticide drugs, preferably only for vegetable insects, so that the effect is faster, but if you want to be a real **, you need to consult a doctor how to prescribe the right medicine.

Prevention and control methods: 1. Strengthen the management of water and fertilizer, enhance the disease resistance of plants, and remove diseased leaves to reduce the source of damage. 2. Before sowing, you can use Fumei double wettable powder to dress seeds, which can reduce its incidence, and at the same time, you can use chlorothalonil or mancozeb wettable powder for Enshi in the early stage of the disease, about ten days or so to spray once, three times in a row can have an effect.

<> mainly harms leaves, petioles, peduncles and horns. Both seedlings and adults can be damaged. The leaves are damaged, showing nearly circular green spots at first, and after enlargement, they are dark brown in the middle, pale green on the edges, with or without obvious wheel lines.

When wet, the surface is densely covered with black mold. Crop rotation with non-cruciferous crops. At the beginning of the disease, 500 600 times of 75% chlorothalonil wettable powder, or 1 500 times of 50% promethanin wettable powder, sprayed once every 7 10 days, and sprayed 2 3 times in a row.

In the peak stage of larvae, 200 times of BT emulsion is used, or 5% anti-tapo emulsifiable liquid, and 5% Ruijin special suspension is used in the peak stage of egg hatching, 17ml-34ml per 667 square meters, 50L-75L of water, or 2000 times of 5% anti-tapo emulsifiable concentrate, or 3000 times of avermectin emulsifiable concentrate before the larvae are sprayed before 2 instars. The above agents should be rotated and used alternately, and a single type of pesticide should not be used continuously all year round.

The damage period of aphids is relatively long, and it can be harmful during the whole growth and development period of cauliflower. It mainly sucks the leaf sap by nymphs or adults, and gathers into a clump on the back of the leaves, secreting yellow honeysdew to cause the cauliflower leaves to turn yellow and eventually fall off. In addition, aphids are also vectors for the spread of viral diseases, causing plants to yellow, or even die.

The principle of timely, appropriate, scientific use and alternate use of pesticides is the principle. It can be sprayed with 50% anti-aphid wettable powder 1 000 times, or 2000 times of cypermethrin emulsifiable concentrate, 10% imidacloprid 2 000 3 000 times liquid control or aphid lice net, spraying 1 time every 5 7 days, spraying 2 3 times in a row.

We must pay attention to management, manage in accordance with reasonable methods, and make reasonable arrangements for fertilization. Before sowing, it is necessary to mix the seeds with Fumei, which can reduce the incidence to a certain extent. Some pesticides can be used and sprayed on time to prevent pests.

1.Physical method: using the phototaxis of pests, set up a frequency vibration insecticidal lamp or black light in the field to trap and kill insects; It is also possible to use the tropism of Spodoptera exigua, diamondback moth and other sex pheromones to place a set of sexual attractants in each acre of the field to trap and kill insects; Foliar spraying of the new high-lipid film forms a layer of physical polymer film, which optimizes the quality of water absorption, breathability and light transmission of plants.

Shielding pest and disease feeding signals and weakening the vector.

2.Biological methods: Biological agents can be sprayed at the early age of pests.

3.Chemical methods: can be targeted chemical spray prevention, the use of chemical pesticides must be used with the new high lipid film, can be modified high toxicity pesticides for poisoning, poisoned pesticides for low toxicity, low toxicity pesticides for micro toxicity.

Control the volatilization of pesticides, prevent light rainwater erosion, reduce the amount of pesticides per mu by half, and improve the prevention and control effect many times.

1. Weeding and ploughing. The weeds in the field should be cleaned in time, and the land should be deeply turned to eliminate overwintering pupa. After harvesting, the remnants and leaves should be removed in time to reduce the number of cabbage insects.

2. Cultivate insect-free seedlings. Use insect nets to raise seedlings to prevent cabbage worms from laying eggs on seedlings.

3. Rational use of pesticides for prevention and control. It needs to be sprayed at the peak of the first and second instar larvae for control.

Hello There are those special drugs for the prevention and control of cabbage worms Taking cabbage worm as an early land example, the special drugs that can control cabbage worm are dichlorvos, trichlorfon, cyhalothrin, etc. Spodoptera liturae can be controlled by alternately spraying 6 000 8 000 times of 21% killer EC, or 4 000 6 000 times of 50% fenvalerate EC, or 2 000 3 000 times of 20% cyanoma or chrysanthemum EC, or 4 000 5 000 times of Kung Fu and Uranus EC. Spodoptera liturae can also be used on land or in an area to kill 3000 times of emulsifiable concentrate, or 80% of the enemy's group of ascending, or chlorpyramide, or 25% malathion 1 000 times of liquid, or 5% of the stuck gram, or 5% Nongmengte 2 000 3 000 times of liquid, 2 3 times, every 7 10 days 1 time, spray evenly and spray enough.

For water spinach, pinch off the leaves of the long insects, hang a night light, and attract the adults, there is no need to use medicine, because the water spinach grows very fast, you can pinch a stubble in a few days, and pay attention to some insects when washing the vegetables.

In this way, the yield of water spinach will be relatively low, and it will lead to a particularly slow growth rate, and then there will be serious problems with the quality, at this time, it is necessary to kill insects in time, and then spray some insecticides and water more.

It will affect the yield of water spinach, and in this process will also cause a series of damage to the surface, and will also cause a series of economic losses.

Weeds must be eradicated so that the growth and reproduction of beet leaf moths can be controlled at the seedling stage, so that they lose their habitat. At the same time, turn over the land to clean up some diseased plants left in cabbage to prevent Spodoptera exigua from reproducing through these diseased plants. At the same time, place more insecticidal lamps in the field to kill some larvae, and clean up the eggs in time.

You can also use some professional agents, spraying once every five days, three times in a row.

Using the phototaxis of pests, a frequency-vibration insecticidal lamp or black light is set up every 40 to 50 mu in the field to trap and kill insects; It is also possible to use the tropism of Spodoptera exigua, diamondback moth and other sex pheromones to place a set of sexual attractants in each acre of the field to trap and kill insects;

When planting, it is necessary to spray pesticides first, and then apply some fertilizer to the cabbage, so that the cabbage grows quickly.

You can get rid of the weeds in the field in time, and then spray it with insecticidal pesticides, which can be well controlled.

The Chinese cabbage is harvest season. If there is an infestation. What to do?

There are many types of pests and diseases. What kind of pest do we observe it is? Different pests have different ways to deal with them.

In the process of Chinese cabbage growth, there are many types of insect pests, and the problem mentioned by the subject does not specifically refer to a single insect pest, today I will also introduce the Chinese cabbage pest control method in general, I hope it will help you.

You can consider using smoke, after all, it has reached the receiving season, sprayed with pesticides, although the insects are dead, but others buy and eat, it is still harmful to the human body. Planting resistant varieties can significantly reduce the occurrence of diseases; In general, the green varieties were more resistant than the white varieties, the sparse straight varieties were more resistant than the spherical varieties, the late-maturing varieties were more resistant than the early-maturing varieties, and the hybrid varieties were more resistant than the ordinary varieties.

Control measures: choose disease-resistant varieties; Adjust the layout of vegetables, rotate crops reasonably, and remove diseased plants in time; Sow early at the right time to avoid high temperatures and aphid rampant seasons; control of poisonous aphids at the seedling stage; At the beginning of the disease, spray 500 times of virus No. 1 emulsion, or 1000 times of virus No. 2 emulsion for prevention and control. What are the leaf-eating pests of Chinese cabbage?

In the planting process of Chinese cabbage, the main pests that harm the growth of Chinese cabbage are cabbage aphid, whitefly, cabbage butterfly, Spodoptera exigua, Spodoptera litura, diamondback moth, cabbage borer, jumping beetle, ground maggot, mole cricket and ground tiger.

Prevention and control points: the insect pests of Chinese cabbage are mainly divided into germination period, seedling stage, rosette stage, ball stage, sprouting stage, flowering period and pod stage, these seven periods of leaf-eating insects are mostly to gnaw new shoots, leaf-eating seedlings and fat leaves, these insect pests are more species, mainly insects and gastropods, with high-efficiency cypermethrin vinegar or other inulin vinegar, 15 ml per sprayer water, or 10 ml of 5 100, or 5 100 chlorantraniliprole suspension emulsion 5 ml, mixed with 10 100 of 15 grams of chlorantraniliprid, or 50 100 grams of pymetrozine, or 10 100 grams of enyldimidoxam.

Frequent spraying of pesticides, fertilization, and proper watering of cabbage can prevent the occurrence of diseases, and the ambient temperature of cultivated cabbage should not be too high.

When such a situation occurs, it is necessary to remove the pests in time, and the destroyed leaves must be removed in time, and then some pesticides must be sprayed, and fertilizer must be applied.

Pesticides should be sprayed in a timely manner, and the right medicine should be prescribed, and the ratio of pesticides should also be paid attention to, water and fertilizer management should also be done, and sufficient light and environmental adaptation should also be maintained.

The use of mulching cultivation in places with severe insect infestation can reduce the damage; After harvesting, the soil is turned deep to destroy its habitat and spawning grounds; clean the fields and eradicate weeds; Timely tillage, ditch cleaning and drainage can also worsen its activity conditions and reduce the harm.

3. Prevention and control methodsIf you see that the cabbage you grow has been infested by pests and diseases, the most direct and effective way is to spray pesticides. But be sure not to overdo it, because pesticides themselves have a certain amount of ***, and spraying too much will also cause harm to people's bodies. If you want to eat healthier and greener cabbage, you can use biological control methods.

Predators that attract diamondback moths will drive them away.

The harm of this insect is to affect the core of the cabbage, damage its rhizome, and also affect the fruit, the plant will be affected, and there will be a lot of silk on it, because that kind of insect will spit silk.

This insect pest is very harmful, it can cause damage to the roots of the cabbage, it will also cause the leaves to turn yellow and wilt, and the excrement of this insect will also cause the leaves of the cabbage to be contaminated.

Generally, they will eat cabbage, and it will also destroy the beauty of cabbage, and it will also cause a lot of problems, and it will also make people particularly upset.

Summary. Dear, help you find out: the cabbage diamondback moth is very harmful to the cabbage, it does not put the laid larvae on the cabbage, and then these larvae rely on the juice of the cabbage to obtain nutrients.

Diamondback moth is the main pest, what is the harm of diamondback moth?

Dear, help you find out: the cabbage diamondback moth is very harmful to the cabbage, it does not put the laid larvae on the cabbage, and then these larvae rely on the juice of the cabbage to obtain nutrients.

Originally, cabbage has a very large demand for nutrients when it grows, and some larvae compete with them for nutrients, which is not conducive to their growth.

Therefore, when farmers see that their fields are infested by pests and diseases, they should also take solutions in time. The most direct is to spray directly with pesticides, but everyone must pay attention to the appropriate amount.