What should I do if there is an eight point gray lamp moth insect infestation in the Chinese cabbage

It often forms depressed necrotic spots on the veins on the back of the leaves, and the plants are deformed, dwarfed, and do not bulb or have a soft and empty shell feeling. Diseased plants sometimes appear crooked, half of them are shrunken, half of them are withered, and half of them are balls, so vegetable farmers call them cabbage half crazy. When planting cabbage in the open air, it will be too negligent due to its own lack of diligent management {we can see with the naked eye that there will be many small holes in the leaves on the outside of the cabbage, and Chinese cabbage is a home-cooked dish on the table of the common people, especially in winter, Chinese cabbage has become a must-have dish for northern families.

Pests of cabbage can be divided into pests at the seedling stage and pests at the bulbous stage. Insect pests at the seedling stage, with yellow-striped jumping beetles. Cabbage worms.

ground tigers, etc. The insect pests in the bulbous stage of cabbage are mainly aphids. This aphid directly harms cabbage.

Mild ones cause wounds and plant impacts. In the worst case, it can lead to death.

Chinese cabbage <> is planted in most areas of China due to its strong adaptability, high yield, and storage resistance.

The delicacy is inseparable from the planting of vegetable farmers, but how to plant and manage Chinese cabbage, what are the main pests and diseases in the growth process of Chinese cabbage, and how to break the cabbage leaves. Prevention and control measures:

As much as possible, choose the fields of wheat, rice, and leguminous crops to plant cabbage, and avoid continuous cropping with Solanaceae, melons and other cruciferous vegetables; Turning the ground as soon as possible to promote the decomposition of diseased and disabled bodies; Downy mildew of deep ditch high cabbage: occurrence characteristics, symptoms and prevention methods. It is a fungal disease and is harmful to leaves.

When the cabbage enters the core stage, when the conditions are suitable, the lesions on the leaves increase and the patches are connected, the leaves are yellow, and the diseased leaves develop from the outside to the inside, and the plants can not be wrapped in severe cases. Cabbage is the most common vegetable on our table, it is nutritious, tender and refreshing, in addition to its many preparations, it is deeply loved by people. Cabbage is fresh and tender, not only we like it, but also many pests and diseases, common pests and diseases of cabbage and control methods.

Can be sprayed**. Use a drug that is sensitive to the eight-point gray lantern to dilute it with water and then spray it. But seven days before the harvest, it is better not to use drugs.

It can be sprayed with pesticides to kill pests, make them unable to survive, and protect the growth trend of Chinese cabbage.

Chemical pesticides should be used, because only in this way can they better kill pests and reduce their impact on crops.

The diamondback moth is also called the diamondback moth, and the larvae are commonly known as the small green worms, and the adult body is 6 7 mm long, the wingspan is 12 15 mm, and it is light brown. The forewings have yellowish-white three-degree zigzag ripples, the two wings are closed when stationary, the antennae are stretched forward, the forewing edge hair is long, and warped like a cocktail, diamondback moth is only a disease and insect pest that occurs on cruciferous vegetables at the earliest. It was first seen on cabbage and purple cabbage in the Tianshui area.

The name of the Tianshui region occurred on cabbage, and later developed into cabbage, radish, cabbage, cauliflower, cauliflower, and lettuce.

Sex attractant control method: the use of synthetic insect sex hormones (sex attractants) to trap diamondback moth, 10-15 trap cores per mu, 10 days to replace once, high temperature and dry season, 7 days to replace once, diamondback moth adult trapping effect is good, the main breeding time in a year is mainly three times, the first time at the end of spring; The second is in the summer, the third is in the late summer to early autumn, and generally 6 to 20 generations can be born in a year. The egg stage reproduction is 2 to 12 days, and the larval reproduction period is about 11 to 28 days.

The diamondback moth, also known as the hanged ghost and the small green worm, is a gray-brown moth whose adult is a small gray-brown moth. It is the larvae that harm the vegetable, which are 6 8 mm long when they are old and mature, pale green, and slightly pointed at both ends. Diamondback moths are small, reproduce quickly, and lay large eggs, so they are often ignored by people and break out.

The first instar larvae of diamondback moth feed on plant mesophyll, leaving the epidermis, forming transparent spots on the leaves, and forming leaf cavities; The 3 to 4 instar larvae of diamondback moth can feed on the leaves into holes and nicks, and in severe cases, the whole leaves are eaten into a net.

Agricultural control law: when planting vegetables, avoid continuous cropping and mixed cropping of cruciferous vegetables, and the plots that have been planted with cruciferous vegetables can be rotated with tomatoes, lettuce, potatoes and other crops; After harvesting, clean up the insect leaves in the field in time to reduce the insect population base. When planting vegetables, avoid continuous cropping and mixed cropping of cruciferous vegetables, and the plots that have been planted with cruciferous vegetables can be rotated with tomatoes, lettuce, potatoes and other crops; After harvesting, clean up the insect leaves in the field in time to reduce the insect population base.

When choosing Chinese cabbage, it is necessary to spray pesticides on its roots and seedlings, spray some on the soil, and then spray some after it is done, and then spray pesticides according to the growth cycle of Chinese cabbage.

In such a situation, I think that pesticides should be sprayed in time, and insect pests should be removed regularly, and these pests should also be driven out in time, and water and fertilizer management should also be strengthened, and it is also necessary to ensure sufficient sunlight to ensure soil permeability.

When planting, we must choose the soil is more fertile and wide land, and in the process of fertilization, we must choose farmhouse fertilizer, do not use fertilizer bought outside, and often prevent the occurrence of pests and diseases, water the plants more, if there are small insects, then we must spray insecticides in time.

As long as there are cruciferous vegetables and wild vegetables in clean fields, there is the possibility of diamondback moth survival, therefore, winter open field cultivation, reserved plants and leafy vegetables cultivated in protected areas are the source of wintering insects, the insect quantity is more concentrated, and the pest resistance is also the weakest.

After the vegetable is harvested, or before the insect activity in early spring, the vegetable field can be completely removed from the residue and dead leaves, which can eliminate a large number of insect sources. "Tearing down the bridge" to prevent and control summer 6 July, cruciferous vegetables are less cultivated, and diamondback moths are concentrated in summer cabbage, summer cauliflower, summer radish, summer cabbage and other vegetables, so the "bridge" is gradually transferred to the cruciferous vegetables cultivated in a large area in autumn.

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.

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.

Weak seedlings do not need to be pulled. Can be grown in other containers. Watering is indispensable in the production of vegetables.

It is usually watered frequently during the seedling stage. The seedlings have to absorb a lot of nutrients at the seedling age, and the seedlings are relatively fragile, so you should also pay attention when watering. Another point to note is that young cabbage at the seedling stage is more likely to stick, so when the cabbage seedlings are planted, the cabbage should be covered with an insect repellent net or sandpaper to prevent insects from eating the leaves of the cabbage.

Fertilization usually becomes a layer of fertilizer at the beginning of sowing. Then the cabbage can be fertilized for the second time when it is fertilized, that is, after nearly three weeks, the seedlings can be fertilized a second time. The final harvest time of cabbage is usually around 40 days, so it takes 5 weeks to fertilize the cabbage.

As with many vegetables, fertilizing once every two weeks will do. This stage is also relatively simple. Unlike other stages, it is necessary to pay attention to the details, but after fertilization, water the vegetables at regular intervals to allow the cabbage to absorb more nutrients from the fertilizer.

It is best to apply foot fertilizer before planting cabbage. It is best to choose a ripe farmhouse fertilizer for base fertilizer. Because farm manure not only contains the nutrients necessary for the growth of cabbage, but also makes the soil looser and prevents it from hardening.

After sprinkling the base fertilizer, turn the ground deep and level to plant. Cabbage is best planted in furrows. Furrow planting is more conducive to later irrigation and drainage.

During the growth period of cabbage, the water demand is large, and it is inconvenient to plant on flat land and furrows. On top of that, it's easier to drain stagnant water from the field. Because cabbage is planted during the rainy season, it rains a lot and it is easy to drain water from the ground.

Cabbage planting is generally direct sowing, cabbage appears after the cabbage to carry out simple seedlings, cabbage growth period to carry out two seedlings, the first seedling is cabbage grow 2 3 true leaves after the triple, pull out the cabbage seedlings that grow too dense. Cabbage seedlings grow 4 5 true leaves after the second liver seedling, this time the liver seedling is also called fine seedling, in order to determine the plant spacing of cabbage, the plant spacing of ordinary cabbage is about 30 cm. Saplings can also be reasonably determined based on the variety of cabbage.

When the cabbage seedlings are set, in addition to the seedlings, the seedlings should be replenished in time, and the seedlings should be watered in time after the seedlings are replenished to ensure the survival rate.

The upper crops are cleaned, and 3,000 kilograms of farmhouse fertilizer sufficient for decay are used per mu, 60 kilograms of 45% controlled-release fertilizer, kilograms of various trace elements, and 2 kilograms of avermectin granules. There are more underground pests, and 1 kg of new yellow kernel particles have been added. After spraying evenly, deep ploughing is done, which then causes furrows, ready for sowing and planting.

Before sowing, the seeds are mixed with Fumei seed garment agent to prevent disease at the seedling stage. Or mix with cresol according to the weight of the seeds.

The leaves can be eaten into holes, missing, and in severe cases, all the leaves are eaten up, and the whole plant dies. Biological pesticides such as 1500 3000 times of 5% anti-Taibao EC or 2000 3000 times of insect mite emulsifiable concentrate have ideal control effects on Spodoptera exigua.

Spodoptera exigua will eat the leaves into holes, and in severe cases, they will eat the leaf veins and leaf hearts, so that the crops will die. It can be killed by black light trapping or averibacterium.