How should cabbage seedlings be managed? How to prevent insect infestation in cabbage?

When the two leaves are concentric and the true leaves are 4-5, the cabbage seedlings become seedlings in stages, and the leaf shape is normal, leaving a strong sapling. After grouping, the stubble is determined according to the characteristics of the variety, and the ditches and weak seedlings with insufficient germination are supplemented and replaced in time.

Seedlings should be replenished with water in time to prevent evaporation too quickly, keep the soil moist, and fertilize in combination with fertilization. For small seedlings with weak growth, sprinkle 2 3 times of 200 300 times of ether water to promote the growth of weak seedlings. In the early and middle stages of balling, 10 kg of compound fertilizer was supplemented.

Avoid flooding and prevent the spread of soft rot, black rot and other diseases.

Cultivate 2 or 3 times at the seedling stage to loosen the surface, prevent water loss too quickly, and at the same time remove weeds and reduce the reproduction of pests and diseases. After the seedlings are set, the tillage depth of 5-6 cm is appropriate to promote the growth of roots.

The main pests that often occur in the seedling stage are aphids, powdery mildew, small moths, cabbage worms, jumping beetles, crickets, etc. The main diseases are powdery mildew, rot, virus disease, etc.

Aphids, powdery mildew: You can use the yellow plate to trap or choose high-efficiency chlorofluorocarbon, avenella, Actet, mites, matrine, etc., and take pharmaceutical preventive measures.

Diamondback moth, diamondback moth: selective attractant to lure diamondback moth. Prevention of larvae such as BT emulsion, phosphocholinergics, onycholine, avermectin, etc.**.

Jumping armor, crickets: efficient cyanide, blowout prevention and control options.

Snails, crickets: when living with tetrasaccharide set granules, I can also use quicklime as a precaution around the field.

After my family planted cabbage, my grandfather prepared wheat bran (wheat husk), stirred it with insecticide, and sprinkled it evenly in the cabbage field, which can effectively kill ants. In addition, according to the characteristics of ants that like sweets and meat, dig deep trenches in the cabbage field, put brown sugar, bones, etc., and cover them with thin soil to attract ants, and ants gather together and can be killed collectively with insecticides.

In addition to killing ants at the seedling stage, it is also necessary to remove melons and plant debris from the vegetable garden before planting cabbage, which will attract many ants to bite. Vegetables should be cultivated frequently in the middle of growth to block the entrance of ants and reduce the appearance of ants.

If the infestation is not severe, it is generally best not to use insecticides. This is because cabbage seedlings are not well tolerated at the seedling stage, and if a high concentration of insecticide is used, the seedlings will burn easily. If the infestation is severe and an insecticide needs to be used, it must be diluted according to the insecticide instructions, and the dose cannot be increased carelessly.

It is necessary to prevent heartburn, white heart, etc.

Preventing ants and other pests from biting cabbage is a combination of prevention and prevention. The cabbage seedling stage is the peak period for insect infestation, so don't care about it after planting it.

Cabbage seedlings should be checked every day, after the treatment of seedlings emerges, until before transplanting, it is found that there are hatched larvae, and pesticides will be sprayed immediately, at this time the resistance of the insects is the lowest, special attention is paid to the cabbage seedlings in the ground, and the larvae will hatch in two or three days when Qing'e flies.

Pay attention to watering cabbage seedlings slowly, and the water flow should be fine, so as not to wash away the cabbage seedlings. To prevent the insect pest of cabbage, it is necessary to remove the insects that appear on its body, such as cabbage insects, and the smaller insects need to be removed with pesticides.

I think we should improve pest management and fertilize more so that we can grow better. If bugs appear, spray them with professional pesticides.

Cabbage seedling stage. This growth stage is the most vulnerable period of cabbage, especially prone to pests and diseases, the most common is aphids and vegetable borer, can be used 50% of the aphid fog wettable powder or aphid buster 1,000 times liquid spray control, can effectively prevent aphids, can also be used to treat other pests. In order to prevent other diseases, the field can be disinfected.

No spraying method to prevent cabbage pests. Grass ash insecticidal method. It is to use plant ash to control aphids, beetles and other pests, the first can directly sprinkle plant ash in the cabbage field, 30 to 40 kg per mu, and the second can be sprayed with plant ash solution, with one to two kg of plant ash solution per mu, sprayed directly in the place where the pest is infested.

Tobacco pest control law. The principle of tobacco insecticide is the same as that of plant ash, you can gather tobacco leaves or cigarette butts, and break the tobacco leaves, add boiling water to soak, wait until the water temperature drops to 20 degrees Celsius, take out the tobacco leaves and change the water to soak until there is no thick juice of tobacco water. After four times of filtration and soaking, the components in the tobacco leaves can fully react with water, and then the filtrate is sprayed on the cabbage leaves at a rate of fifty kilograms per mu.

Freshly unearthed cabbage seedlings can be sprayed with a little pesticide, the right amount of spraying pesticides can prevent insect pests, and can also make the seedlings grow healthily, using this method can be very good to achieve this effect.

Grass ash insecticidal method. It is to use plant ash to control aphids, beetles and other pests, the first can directly sprinkle plant ash in the cabbage field, 30 to 40 kg per mu, and the second can be sprayed with plant ash solution, with one to two kg of plant ash solution per mu, sprayed directly in the place where the pest is infested.

We should spray these seedlings with pesticides for pests and diseases, so that they can prevent pests well, and it is also a very reasonable choice.

If there is water in the field, it should be drained in time to effectively prevent soft rot. After the onset of the disease, 70% of the dixon should be sprayed every 7-9 days for spray control, and the frequency of prevention and control should be increased for serious diseases. Prevention and control methods:

Choose downy mildew resistant varieties such as: Jinlu 75, Beijing Xin 2, Beijing 80, 106, etc.; Before sowing, use 200 times of 25% methamanine wettable powder by seed weight, apply 1 time in 7 days, and spray 2 3 times in a row. Before planting Chinese cabbage, the weeds left by the previous crops should be removed, and at the same time, the aphids and cabbage insects on the vegetables should be controlled to reduce the source of bacteria and insects, and reduce the insect infestation.

<> cabbage cataplexy is a common disease of cabbage, and the disease spots will appear in the case of the disease, which will cause the leaves to slowly curl up and then wither, the main prevention method is to disinfect the land and seeds before planting Chinese cabbage to prevent the occurrence of diseases! 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.

Cabbage cataplexy disease is common in a variety of vegetables, harmful to the seedling stage, the seedling root appears water-stained lesions at the time of the disease, with the change of the disease gradually shrunk into a line, and then folded to the ground, cabbage downy mildew: the occurrence characteristics and symptoms and prevention and control 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. Dried Chinese cabbage heartburn:

It is a physiological disease, and most of them occur during the bulb stage and storage. The causes of the disease are mostly caused by improper application of chemical fertilizers, soil salinity, poor irrigation water quality, drought weather, improper cultivation management and other factors. Once the outer leaves of cabbage are destroyed, it will seriously affect the growth and development of cabbage and the core, and the feces of the small green worm will also remain in the cabbage heart, which is very affecting the edible value of the cabbage, and at the same time, the identification symptoms of the small green worm gnawing in the field are:

Cabbage can develop throughout the growth period. When the seedlings are sick, the veins of the cabbage heart leaves are transparent and lose green on both sides, forming mottled flowers and leaves with dark green and light green, and the plants are deformed.

You can prevent tiles, leaves, and the sun rises in the cabbage, and then concentrate on clearing and killing, and plant a little other plants in the cabbage field, rice bran, bean bran as bait, and then concentrate on removal.

Strengthen field management, if the field is waterlogged, it should be drained in time to effectively prevent and control soft rot. In the process of Chinese cabbage cultivation, an appropriate amount of organic fertilizer can be applied to select disease-resistant varieties and planted reasonably densely. Do a good job of drainage; Before planting cabbage, the soil should be deeply cultivated to enhance its activity, and the sunlight can also be used to kill the eggs and germs turned out, which is the method to prevent cabbage diseases and pests.

At the time of sowing, we should carry out a series of treatments such as sterilization and sterilization of the seeds. Prevents the resurrection of spores attached to the surface of the seed, and stifies the possibility in the cradle so as not to affect the subsequent growth of the plant. Proper fertilization is also an effective way to effectively prevent diseases.

Increasing the application of organic fertilizer can effectively prevent soil compaction, improve the water and fertilizer retention capacity of the soil, and be conducive to the growth of cabbage.

First of all, pesticides should be sprayed at each growth stage, and the surrounding weeds should be treated every day, so that it can also avoid pests and diseases, and be sure to pay attention to the surrounding temperature.

It should be watered in time and drained appropriately, otherwise the cabbage will be diseased, and dixon with a sandblasting content of 70% should be sprayed every other week for control.

Control and eliminate all kinds of pests as soon as possible, 7-8 days after sowing, spray the leaves to control insect pests, and you can use chlorantraniliprole and cypermethrin spray control.

In normal times, you should water the cabbage more, apply more chemical fertilizers, and spray it with insect-proof pesticides in advance, so that you can prevent pests and diseases.

First of all, it is necessary to water regularly and fertilize, and then spray pesticides in time to ensure ventilation and sunlight.

The planting area of Chinese cabbage is large, and the market demand is also large. It is a perennial vegetable grown by vegetable farmers. Chinese cabbage is planted in the open field, mostly in autumn, and can be sown successively around the beginning of autumn every year; Chinese cabbage sprouts easily.

Generally, germination occurs within 3 days after sowing. How to manage it after it appears? Let's find out.

Protect moisture and seedlings. After the Chinese cabbage is sown, it is necessary to keep the field moist. When the weather is dry, water to create moisture until the cabbage seedlings are finished and the soil is kept moist.

At the same time, the field should not be too dry during this period to avoid aphids and other pests and reduce the probability of virus infection. Aphids can be controlled in advance according to the situation, and sprays such as imidacloprid and avermectin can be used for control.

In order to ensure yield and consistency of management, it is necessary to replant or replant as soon as possible to ensure the continuous growth of cabbage in the field. 5-6 true leaves are the second seedling, and the good ones are left to be bad.

Depending on soil fertility and growth, a thin layer of farmyard manure or 10 kg of ammonium sulfate per mu can be applied starting with thinning seedlings. Seedlings can grow, trees can grow. After applying makeup, water each time.

When applying fast-acting fertilizer topdressing, it should be noted that the distance with the Chinese cabbage should not be too close, nor should it be spread on the leaves, so as not to burn the seedlings and leaves. Urea and potassium dihydrogen phosphate were sprayed after planting to improve the stress resistance and quality of Chinese cabbage. Fertilization at the seedling stage is more important, if the fertility in the early stage is insufficient, it will affect the growth and development of Chinese cabbage in the later stage.

Tillage and weeding.

It seems that tillage and weeding are an indispensable part of all crops. During the first thinning, weeding can be done together. There is more rain in the early stage, mainly to remove weed buds; In the late planting period or when the rainfall is reduced, tillage, soil loosening and weeding can be carried out appropriately.

The cultivation should be uniform, the root system of Chinese cabbage should not be damaged, and pits should not be formed in the field to prevent water accumulation. In the field of ridge cultivation, attention should be paid to cultivation and ditch cleaning during the cultivation process.

Pest and disease control.

At the seedling stage of Chinese cabbage, we should focus on the prevention and control of viral diseases, downy mildew, aphids, cabbage worms and underground pests. Disease-resistant varieties should be selected to avoid drought in the field, and thinning should be done first to prevent aphids and underground pests. Please refer to the above drugs for specific medications.

Scientific selection and seedling breeding, selection of non-fertile seeds and seedbeds, maintaining a reasonable planting density, improving the light transmittance of panicle leakage and closure in the field, and avoiding excessive water and humidity can reduce the occurrence of some excellent fungal diseases.

The above are the key points of Chinese cabbage seedling management. The above points are an important part of the search and judgment of Chinese cabbage seedling management. If you don't pay attention, it will affect the late production of Chinese cabbage, so be careful.