What should I do if there are big white worms under the root of cabbage?

Pinch it directly with your hands, or wrap it in paper, or use tweezers, which means that it is a worm, and you can use some deworming drugs.

Soil treatment When planting, phosphine granules (kilograms per mu) are mixed into chemical fertilizer, and then applied to the soil, which can kill the eggs and larvae of seed flies.

Ground spraying After the number of true leaves of cabbage reaches 2-3, use kilograms of trichlorfon powder per mu.

Bugs on cabbage with creaturesPesticides, pyrethroid insecticides, phenylformylurea insecticides are the best.

1. Biological pesticides

This kind of insecticide is derived from pest-causing microorganisms, which is friendly to the food safety of agricultural products and the production environment.

The type of pesticide that should be preferentially selected in the pharmacy, especially the production of Chinese cabbage with high requirements for pollution-free quality, should be dominated by such pesticides in the prevention and control of cabbage insects. In the process of exerting their efficacy, this kind of insecticide generally needs to go through the process of host infection, expansion and reproduction, and gastric poisoning.

2. Pyrethroid insecticides

Pyrethroid pesticides are characterized by fast killing speed, high efficiency and relatively low pesticide residues after application, and the principle of action of this type of pesticide is by interfering with the nervous system of pests.

It has a killing effect, but the disadvantage is that it will make the cabbage worm resistant after continuous application.

increase, thus gradually increasing the difficulty of prevention and control.

3. Phenylformylurea insecticide

This is a new class of insecticides, which are easily degraded on agricultural products such as Chinese cabbage, as well as in soil and water, with low pesticide residues and almost no pollution to the environment. Phenylformylurea pesticide can inhibit chitin in eggs and larvae through gastric toxicity.

It does not have a killing effect on adult insects, but it can cause sterility of adults and reduce the reproduction of pests.

Hello, I am glad to answer for you that root maggots are one of the main pests that harm Chinese cabbage. Root maggots are the larvae of seed flies. The appearance of the seed fly resembles that of the common house fly.

Its eggs are laid on the dorsal side of the base of the Chinese cabbage gang, and after 2 to 3 days they hatch into small maggots, that is, root maggots. The root maggot then burrows into the soil and bites the epidermis of the Chinese cabbage roots, which causes the germs in the soil to take advantage of the weakness and cause the Chinese cabbage to rot. If it is not prevented and controlled in time, the whole field of Chinese cabbage can be harmed, and no one is spared.

How to control Chinese cabbage root maggots? The main methods are: 1. Soil treatment Before Chinese cabbage planting, 3 4 kg of methamidophos, or kg of phosphine calypin granules can be used per mu, mixed with chemical fertilizer, and applied to the soil to kill the eggs and larvae of seed flies.

2. Ground spraying When the Chinese cabbage grows to 2 3 true leaves, kilograms of dimethoate powder can be used per mu to spray the ground in the field to prevent seed flies from entering the field to lay eggs. 3. Root application When the Chinese cabbage grows to 6 8 leaves, it is necessary to mix plant ash, lime powder and trichlorfon powder, and the ratio is 2:1:

1. Sprinkle around the roots to prevent the flies from laying eggs and kill the larvae before entering the soil. Fourth, when it is found that the Chinese cabbage in the field has root maggot damage, it is necessary to immediately irrigate the roots with 600-800 times of 600 times the solution of 90 crystal trichlorfon to kill the root maggots to avoid or reduce the harm.

1. Physical prevention and control.

1) Use yellow sticky insect boards to trap and kill aphids, whiteflies and other pests.

2) Sweet and sour liquid booby-trapping: The sweet and sour liquid is prepared with 3 parts of sugar, 3 parts of vinegar, 1 part of high liquor, add 10 parts of water, and then add 90% crystal trichlorfon parts, mix evenly and put it into a large bowl, place 1 per 80m2, cover it during the day, open it at night, and change the sweet and sour solution for 1 time in 10-15 days.

2. Biological control.

release of natural predators, such as predatory mites, parasitic wasps, etc.; the use of biopesticides such as Bacillus thuringiensis, avermectin, etc.; Biological fertilizer is applied.

3. Chemical control.

Aphids and whiteflies should be alternately sprayed with 10% imidacloprid wettable powder 1000-1500 times, or 10% acetamiprid 1000-1500 times, sprayed 2-3 times, paying attention to the back of the leaves. Brassica and Spodoptera exigua were sprayed alternately with cypermethrin 2000 times or cyhalothrin 3000 times before the 3rd instar.

For downy mildew, 1500 times of 25% di-alkynylamide suspension, or 600-800 times of 72% frost urea manganese-zinc wettable powder, used in rotation, sprayed once in 7-10 days, and continuously controlled 2-3 times. Soft rot is sprayed with 4000 times of 72% agricultural streptomycin sulfate wettable powder, or 1000 times of 3% Zhongshengmycin wettable powder.

I will not copy, just say that the actual experience, cabbage is easy to attract cabbage worms, and you can use organic pesticides that are safe for humans and animals, such as cotton bollworm polyhedrosis virus and Bacillus thuringiensis. The prevention and control effect is good, and it is safe and non-toxic.

Avoid continuous cropping of cruciferous vegetables and pay attention to cleaning the garden. If aphids are found to be controlled in time, spray once every 7 days, spray 2 3 times in a row, spray mainly on the back of the leaf and the heart of the leaf part when spraying, the agents that can be used are: 40% dimethoate emulsion 1000 2000 times liquid, 50% aphid mist (anti-aphid) wettable powder 2000 3000 times liquid, deltamethrin emulsifiable concentrate 3000 times liquid, 21% killing emulsifiable concentrate 4000 times liquid, 24% Wanling liquid 1000 times liquid, 50% dialbum emulsion 1000 1500 times liquid.

General aphids and the like, you can use pyrethroid or acetamiprid, imidacloprid and other agents, these are low-toxicity agents, it is recommended to use the latter two, they should belong to the new type of insecticides in classification, the efficacy is generally good, the dosage is not large, and it is also effective on cabbage worms, of course, such as biological agents avermectin and other agents can also be used to control cabbage worms or tobacco worms. However, it is not recommended that you use these agents directly, it is recommended that you first find out the types of pests, the situation of insect pests, and the local pesticide application habits, and then prescribe the right medicine, so as to ensure safety, otherwise it may bring losses, and you can consult the local plant protection department if you have difficult questions.

Pesticide products can generally be said to have a trade name and a generic name, manufacturers will generally take a trade name for their products, which is also allowed, so some dazzling and beautiful names come out, for example, such as household mosquito pesticide gunner, etc., but according to the regulations, the product label or instruction manual must indicate the active ingredient, in fact, this is generally the generic name of the active ingredient (when visiting the supermarket, you can pay attention to mosquito coils and insecticidal aerosols, such as the gunner mentioned above, etc., You can find its active ingredients on the label, mostly pyrethroid agents, in addition to the three certificates of pesticides can also be found on it), of course, some businesses use English common names, which may cause certain obstacles to consumers. The medicine mentioned above is the generic name of the drug, of course, some manufacturers no longer take another name, especially the traditional medicine, such as dichlorvos, etc.

If it is home grown, it is better to use natural plant insecticides. Low-toxicity pesticides can be used in the field: The selection of appropriate pesticide varieties is an important way to control vegetable pests, reduce pesticide residues, and ensure food safety. The following introduces several new types of high-efficiency and low-toxicity insecticides for vegetable fields.

First, the rice is full of 20 suspensions. The drug is a bionic pesticide of insect molting accelerator. It can promote the peeling of lepidopteran larvae, resulting in larvae dehydration, inhibition of feeding, and eventually starvation to death.

Miman has high efficacy and long duration of effect, and is effective for larvae of all instars. It mainly controls Spodoptera exigua, Spodoptera litura, Spodoptera exigua, cabbage worm, etc., but the control effect on diamondback moth (Hanging filaria) is not good. It is usually sprayed with 1500-2000 times the agent during the larval development stage.

2. Caixi Caixi is a suspension agent, a biological agent, which mainly acts on the central nervous system of insects, has stomach toxicity and contact killing effects, and can effectively control diamondback moths, thrips, etc. It is usually sprayed with 1000-1500 times of liquid at the early stage of diamondback moth larvae or the early occurrence of thrips.

3. Eliminate the nipter, also known as fenfenapyr, which is 10 suspension. The agent acts on the mitochondria of cells in insects, and acts through multifunctional oxidases in insects, mainly inhibiting the conversion of adenosine diphosphate to adenosine triphosphate. The drug has strong permeability, has a certain systemic effect, has a wide insecticidal spectrum, high control effect and long lasting effect.

Able to moderate resistant pests. It can effectively control diamondback moth, cabbage worm, beet armyworm, Spodoptera litura, cabbage borer, cabbage aphid, spotted submarine fly, thrips, etc. Use 10 mu to remove 30-50 ml, add water spray.

Fourth, the Taibao is also known as Dingwormlong, which is 5 ...

Cabbage pests and diseases.

Cabbage has a strong ability to withstand cold, like a cold climate, when cultivated in the high temperature season, it is easy to cause diseases and insects, or low quality, low yield, the main pests and diseases of cabbage are cabbage returning green worms, cabbage aphids, whiteflies and whiteflies, cabbage cataplexy and so on.

Cabbage grows bug causes.

Because cabbage is mostly planted in the open air, the seeds that fly over from butterflies and e'e will become pests that erode cabbage as the hatched insects grow up.

Cabbage long bug solution.

If there are fewer insects in cabbage, you can gently brush the insects down along the leaves with the help of a soft toothbrush, and if the number of insects is large, you need to spray in time for control.

What medicine does the cabbage have bugs.

Aphids and whiteflies can be used alternately with 10% imidacloprid wettable powder 1000-1500 times, or 10% acetamiprid 1000-1500 times, to spray on the back of the leaves, cabbage worms and beet armyworms can be used with cypermethrin or cyhalothrin with high efficiency.

Cabbage long bugs solve the trick.

1) Use yellow sticky insect boards to trap and kill aphids, whiteflies and other pests.

2. Sweet and sour liquid booby-trapping: Prepare sugar, vinegar, high liquor, water, 90% crystal trichlorfon, mix evenly and put it into a large bowl of patting, and then spray it.

Cabbage pests and diseases leak Heliang preventive measures.

Strengthen cultivation management, the land should be leveled, the drainage and irrigation system should be good, to prevent water accumulation in the field for a long time after rain and irrigation, the soil should be disinfected before planting, and fully decomposed compost must be used when fertilizing, and the varieties with strong resistance should be selected to remove the diseased plants in a timely manner, and destroy them in a centralized manner, and sprinkle lime around the plants to reduce the generation of pathogens.

Insecticide method without spraying.

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.

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 spine insect killing is the same as 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 with 50 kilograms per mu.