How to prevent and control the harm of Chinese cabbage and vegetable borer

In the process of planting Chinese cabbage, it is easy to appear vegetable borer, vegetable borer is also called borer, its larvae mainly eat vegetable seedlings and cabbage hearts, and will spit silk weaving nets, and the emergence of vegetable borer insect pests will find that there are many wire nets at the cabbage heart, which will affect the growth of vegetable seedlings, and the whole vegetable seedlings will be eaten, and there will be headless seedlings or multi-headed seedlings, and finally wither yellow, resulting in reduced yield.

What are the hazards of vegetable borer, and how to prevent it?

First, the harm of vegetable borer.

With its larvae eating choy sum, the newly generated larvae will crawl to the choy sum and spin silk into a net, hide in it and eat the choy sum, resulting in a devastating lack of seedlings, and the whole plant is eaten to form headless or multi-headed or even missing plants. Loss of yield due to loss of plants or wilting.

The larvae will also eat stems and roots when they grow into adults. The wormhole obviously caused the Chinese cabbage to not be properly coated and lost its value.

Second, the prevention and control of vegetable borer.

1) Land consolidation.

First of all, avoid planting with similar vegetables, clean up the remaining stems and old leaves of the plot in time, plough the soil to extinguish winter pupa, reduce the density of larvae in the soil, and reduce the harm of vegetable borer.

2) Biological control.

Add 1 to 2 kg of cucumber vine and 1 kg of water, soak and mash to get juice. In spraying with 6 parts of water per part of juice, or using 500-700 times of Bacillus thuringiensis emulsion, it can also be sprayed with 1000 times of rotenone emulsifiable concentrate.

3) Artificial prevention and control.

Vegetable borer larvae like to gather together, after the seedlings are fixed, the field operation found that the seedlings are set out in time to extinguish the larvae, which can save costs and the effect is also very obvious.

4) Drug prevention and metallurgy.

Vegetable seedlings are most susceptible to the damage of vegetable borer in the defoliation period, try to use the drug in the early stage of larvae, such as seeing that the cabbage has a knotted wire mesh can be sprayed, can be sprayed with 10% chlorfenapyr suspension agent 1500-2000 times liquid or 18% insecticidal aqueous agent 800-1000 times liquid spraying, spraying should be concentrated as much as possible when spraying cabbage sum, because the larvae will be concentrated in the center of the cabbage sum under the wire mesh.

In addition, the agent must be used alternately, and pay attention to the safety interval of pesticides to avoid human losses.

The above is the hazard and prevention and control methods of vegetable borer, master the above methods to reduce the danger room caused by Chinese cabbage and vegetable borer, and minimize the loss.

Insecticides can be used either with Bacillus thuringiensis.

Diamondback moth: When the number of insect pests is small, it can be controlled by manual killing. Aphids:

Remove the leaves of the diseased insects in time, and spray the remaining plants with pesticides to disinfect. Black spot disease: Irrigation of carbendazim or chlorothalonil solution to the root system, and pruning of severely infected cabbage rhizomes.

Anthrax: Spraying dimethoate and other agents on the leaves.

1. Diamondback moth

Diamondback moth mainly eats cabbage mesophyll for a living, when it eats the leaves, it will form a transparent spot, in serious cases, it is easy to cause the leaves to show a transparent color net, at this time it is necessary to take corresponding measures as soon as possible, if the number of insect pests is small, it can be controlled by manual killing.

2. Aphids

Aphids like to suck on the branches and leaves of cabbage, causing the leaves to curl and bend, and malnutrition at the same time, at this time, it is necessary to remove the leaves of the insects and insects in time, and spray the remaining plants with pesticides to carry out disinfection treatment, so as to prevent the germs from continuing to infect the cabbage leaves.

3. Black rot

Cabbage in the seedling stage to maturity stage, easy to suffer from black rot, in the early stage of the disease, the leaves will appear water-stained lesions, the roots are black and rotten, at this time can be irrigated to the root system carbendazim or chlorothalonil solution, and the rhizome of the seriously infected plant is cut off.

4. Anthrax

In the early stage of anthrax, there will be pale or greenish water-stained dots on the leaves, and then slowly expand into round gray-brown lesions.

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.