What should you do if you want to reduce the occurrence of diseases when planting Chinese cabbage in

Choose cabbage varieties with strong disease resistance and good quality, delay the sowing date appropriately during the wrong development period, and avoid the time when high temperature and high humidity are prone to disease. After the cabbage seedlings are set and the seedlings are slowed down, spray the pesticide continuously 3 times a week or so.

If you want to reduce the occurrence of diseases in autumn Chinese cabbage, the best way is to spray it with a certain amount of pesticides, so that it will not lead to the occurrence of insect pests, and it can also effectively relieve some of the pressure of the cabbage reproduction cycle.

Chinese cabbage is not drought or waterlogging, and the high humidity environment is very conducive to soft rot, downy mildew and black spot. Plots with sandy loam soil and convenient drainage and watering should be selected as much as possible, and ridge cultivation can significantly reduce the occurrence of diseases.

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.

Fertilizer and water management in the field to ensure plant growth; and disease prevention and control to ensure high and stable yield of Chinese cabbage. Through scientific control, it can effectively reduce the attack of root swelling disease, soft rot, aphids, diamondback moth and other pests and diseases, ensure bumper yields, and become a "magic weapon" for vegetable farmers to increase their income. Chinese cabbage is a light-loving and cold-tolerant vegetable crop.

In the northern region, it is mostly planted in spring and autumn. Due to the high temperature and humidity in summer, bok choy is prone to pests and diseases, and farmers generally do not plant bok choy in summer. When there is no standing water, you can sprinkle the seeds of the cabbage, and finally apply a thin layer of fine soil.

Note that it is best not to choose the early spring time when the temperature is unstable, which will reduce the germination rate of wheat cabbage.

The growth cycle of Chinese cabbage is short, from sowing to growing 5 7 leaves time is about 35 days or so, you can also eat the seedlings between the edges, Guangdong people like to dry the cabbage to make soup, you can peel the leaves and eat after transplanting into a big tree, you can also eat cabbage sprouts. Because of these characteristics, it is cultivated in various places. It is also important to consider the adaptability of the species and its resistance to pests and diseases.

In production, attention should be paid to the selection of varieties with multi-resistance and wide adaptability, followed by the selection of varieties that are resistant to high temperature, heavy rain, low temperature, disease resistance and late pumping, and finally the selection of high-quality cabbage seeds with qualified quality.

<> variety is the unique nature of the vegetable and what distinguishes it from other vegetables. A good variety not only has a high emergence rate, but also has strong disease resistance and easy planting management, which directly affects the yield. If the variety is misused during planting, it will not only affect the emergence rate, but also reduce the yield and delay agricultural production.

The cabbage heart has a shallow root system with many fibrous roots, and the root groups are mainly distributed in the topsoil layer with a depth of 3 10 cm and a diameter of 10 30 cm. The regeneration ability of the roots is very strong, and the short and constricted stems of the plant are green before the sprouting. The leaves are broadly ovate or elliptic, green or yellowish-green.

There will be powdery mildew, root swelling, anthracnose mainly to the leaves and rhizomes of cabbage to cause harm, we should do a good job of deep soil disinfection before planting, eliminate germs, disinfection is mainly comprehensive and thorough before sowing can be used once lime water as root water, and then the seedlings survive to water again 1-2 times. When fertilizing, you can not apply nitrogen fertilizer alone, and do a good job of drainage and irrigation in the field according to factors such as weather changes and soil conditions.

Common pests and diseases are downy mildew, soft rot, cabbage worms, aphids, etc.

Scientific fertilization, pollution-free production, and fertilization of cabbage should be based on well-rotted organic fertilizer.

Timely removal of weeds in the field; Use silver-gray shade nets to drive away aphids, and insecticidal lamps to trap and kill; Check it up.

Choose a field with high dryness and easy drainage.

In spring, the pests and diseases of cabbage are generally light, sometimes there are aphids, and in the later stage, cabbage worms, diamondback moths, soft rot, downy mildew and so on. Firstly, we should choose the soil that is free of three wastes pollution, chemical pesticides and heavy metal residues, and secondly, it is advisable to choose a sunny and dry field with convenient drainage. Take a narrow furrow and a deep ditch, the furrow is wide and the furrow surface is flat.

Because cabbage is more cold-resistant than other vegetables, so every autumn, some cabbage will be planted in my vegetable garden, fried and eaten, served as a side dish in the hot pot, and the Chinese cabbage that cannot be eaten can also be pickled in a large water tank, and can be eaten for several months. Therefore, it is very important to do a good job in the field management of Chinese cabbage, in the field management of Chinese cabbage split ears, the most headache for vegetable farmers is the gnawing of cabbage insects on Chinese cabbage.

Poor quality of goods is not easy to sell, which reduces economic benefits and can cause many viral diseases. The prevention and control of cabbage insects and other pests can keep Chinese cabbage azadirachtin is a broad-spectrum plant-derived insecticide, which has a repellent effect on almost all pests of plants, and the brother does the drug after being absorbed by the plant leaves, it can be transmitted up and down to all parts of the plant without residue, and the effect is more than 20 days, the pests will not produce resistance, and it is a higher yield and economic benefit of green and public. The prevention and control of Chinese cabbage insect pests should be based on the principle of prevention and comprehensive control.

Strengthen field management and cultivate healthy and good-looking people in order to eat healthier every day, they will still choose to plant some cabbage in their own vegetable garden, because cabbage is also a relatively cold-tolerant vegetable, so it is like the ripening time is also in winter, so it is still easy to attract some green worms. It occurred in all provinces and autonomous regions of China, among which the butterfly was the most widely distributed and the most seriously harmed. It is mainly harmful to cruciferous plants such as radish, cabbage, rape, and cabbage.

The cabbage worm begins to eat leaves from the larval stage, and the holes you see in the leaves may be its masterpiece. In severe cases, once the leftover leaves are attacked by cabbage insects, it will cause the leaf veins to be eaten, and the cabbage will also have various problems, there is no commerciality, and the yield will be reduced a lot, of course, there may be no harvest value when it is serious. So how can we better prevent cabbage worms?

When planting Chinese cabbage in the high temperature season, there are still a lot of diseases and insects that are mainly prevented, for example, yellow-striped jumping beetles, aphids, cabbage worms, diamondback moths, and Spodoptera exigua larvae, these pests and diseases are particularly serious.

The pests and diseases that occur in the summer are yellow side trace jumping beetle, aphid, cabbage worm, diamondback moth, noctuidae larvae and other insect pests, as well as soft rot, virus disease, downy mildew, black rot, black spot, dry heartburn and other diseases.

Large-limb skin and cabbage are prone to insect pests such as yellow-striped jumping beetles, aphids, cabbage worms, diamondback moths, and noctuidae larvae, as well as diseases such as soft rot, virus disease, downy mildew, black rot, black grip barrage, and dry heartburn.

Chinese cabbage planting, for insect pest prevention, there is one of the most critical steps, that is, soil treatment, that is, when preparing the land, use 2% imidacloprid granules or thiamethoxam granules, 1000-2000 grams per mu, or use 1% clothianidin granules about 4000 grams to sprinkle some plant ash near the roots of Chinese cabbage, so that some small insects derived from the soil are less likely to damage the stems and leaves. Pay attention to the amount of fertilizer not too much, just play a role gradually.

How to prevent pests and diseases when planting Chinese cabbage in the hot season?

<> the environment of the production area of cabbage. Cabbage is hardy and likes a warm and cool climate, so it is suitable for cultivation in the northeast region, and it is easy to get sick with insects in the high temperature season, which is not only poor in quality, but also has a low yield. Cabbage has a strong resistance to low temperatures, and can grow normally in a minus three degree environment, and above-ground pests are mainly green worms, noctuidae larvae, jumping beetles, and aphids, which will appear in the Chinese cabbage seedling stage until the Chinese cabbage is harvested.

Among them, the larvae of green worms and noctuidae are the most serious, they mainly eat mesophyll, and often cause the whole leaf to be cut in severe cases.

I went to the field yesterday to check, mainly the big ape leaf beetle and the small ape leaf beetle harm, this insect is also called the black shell insect, it mainly harms the leaves of the vegetable, the leaves are eaten into many round holes, and the insect mouth is more when the leaves are eaten into a net, leaving only the leaf veins, resulting in reduced yield! Cabbage insect: It is the main insect pest of Chinese cabbage, it will eat the leaves into small holes, and in serious cases, it will eat up the leaves, and the feces it excretes will also pollute the cabbage heart, so that the yield and quality of the cabbage will be reduced.

After harvesting and before planting, the yellow and old diseased leaves and stumps should be cleared out of the field in time and buried or destroyed to eliminate the breeding of diseases and insects overwintering or transferring to the main host, so as to reduce the number of diseases and insects. Before wintering, the vegetable field is deeply cultivated, winter irrigation, both can improve the weathered soil, snails: this soft-footed insect is obsessed with the love of greens, many greens love to provoke the love of snails, snails are very harmful to vegetable leaves, and the ability to reproduce is super fast, it is easy to breed and flood, for snail prevention and control, some friends said that a few ducks can be done.

Soil treatment, planting on land with high nutritional value, drug control, timely application of pesticides and insect repellent.

The temperature in the field of cabbage in summer is relatively high, which is suitable for the growth of pests such as cabbage spotted fly and aphid, and is more harmful to cabbage, especially vegetable leaves. Generally, some professional insecticides can be used, such as avermectin, fly amine, etc., but pay attention to the rational use of drugs, do not cause pesticide residues, and affect the quality of cabbage.