Why is there a big green worm in the little cabbage I planted?

The insect that appears in cabbage is the cabbage worm, which is the young eggs of the cabbage that are sown on the cabbage by the cabbage butterflies. It survives by eating cabbage heels and leaves, and cabbage that is harmed by cabbage insects may die, so it is necessary to remove insects in time.

Because you planted the cabbage, he has not been sprayed with pesticides, so there will be big green worms to eat your cabbage.

When the cabbage reaches a certain growth period, there will be big green worms, because the cabbage is too fragrant, so you have to take medicine.

Summary. Hello dear, cabbage cabbage is a green caterpillar with a long body, usually about 3-4 cm, a small, black head with many black spots in the middle of the body. They have 6 legs and a pair of antennae that can wriggle on cabbage leaves.

Have you typed the word, please?

Hello dear, the cabbage cabbage green worm is a green caterpillar with a long body, usually about 3-4 cm, a small, black split head, and many black spots in the middle of the body. They have 6 legs and a pair of antennae, and can wriggle on cabbage leaves.

I want to ask, just now I found a small white reptile on the cabbage planted in my own Yanghui Soutai, crawling like earthworms and caterpillars, and when I found it, there was still undigested chlorophyll in my stomach.

What kind of worm is it?

Kiss, according to the description you provided, could be a larva of a cabbage moth. The larvae of the cabbage moth have a white or pale yellow body, usually about 2-3 cm long, with many hairs on the body and undigested chlorophyll in the stomach, which is often found on cruciferous vegetables such as cabbage. It is advisable to take timely control measures, such as hail spraying with targeted insecticides, or catching and removing larvae by hand.

So what kind of pesticides do you need?

Inulin? If you are going to use insecticides for spray treatment, it is recommended to choose insecticides that have the effect of controlling cruciferous vegetable pests, such as calcium oxide, cypermethrin, imidacloprid, etc. When using silver powder, it should be diluted and sprayed in accordance with the instructions on the manual, and pay attention to protect yourself and the surrounding environment to avoid harm to the human body and other precinct organisms.

When planting cabbage in autumn, the problem depends on the prevention and control of pests and diseases in the early stage, biting the leaves and roots, the occurrence of insect holes, yellowing and even seedlings, endangering the healthy growth of cabbage, giving the middle and late stage of soft rot and the opportunity to promote the production of heart. Therefore, the control of cabbage pests and diseases is very important. Many farmers have reported that when they prevent moths and insects, the effect of spraying is getting worse and worse, and when they saw insects eaten before, they would be good to use the medicine once in two or three days, as long as there are no insects in the field.

Since the cabbage is grown, many farmers are worried about being bitten by insects, and although they have the best equipment like insecticides, it will also be difficult to control pests and diseases. For example, in the control of cabbage worms, some farmers have the wrong idea of using medicine, and at the same time, the resistance of cabbage worms is improved, which in turn affects the control effect.

The best prevention and control stage has been missed

In vegetables, insect pests breed faster, and many farmers habitually apply pesticides when they see insects. The best time to control cabbage worms is before the egging maturity period to the second instar of the larvae, and the effect of spraying is very good. Some farmers apply pesticides after the third instar, when there are wormholes on the leaves or when only the petiole is left in the bite.

Or in the first spray, the wrong agent is used, resulting in the longer the pest infestation, the greater the difficulty of control. If the insect pest resistance can be grasped and the control is early, the actual effect of control can also be improved and the cost of control can be reduced. The resistance of cabbage seedlings is small, and it is generally necessary to gradually spray pesticides to prevent moths in the whole process of replenishing seedlings and budding periods.

If the cabbage worm enters the heart lobe until after balling, the control effect becomes weaker.

Increase the amount of a certain type of drug

The cabbage worm is also resistant, and some farmers often use the same ingredient when spraying, and the resistance of the cabbage worm will be improved, and it is useless after the fight. Farmers will mistakenly think that the more frequent the spraying, the greater the amount of pesticides used, and the better the actual effect of moth prevention. In that way, it will not consume the cost of spraying again and again, and drug damage will continue to occur.

The agents used to control cabbage worms include emamectin benzoate, chlorantraniliprole, indoxacarb, cypermethrin, etc., which are commonly used. Pyrethroid insecticides are more resistant and can be sprayed with other agents. Due to the different varieties of pesticides, the basic principles of insect control are also different, and when the application is replaced or combined, the resistance of insect pests can be reduced to improve the control effect.

For example, after some applications of emamectin benzoate to cause resistance, the combination of emamectin benzoate and indoxacarb is used, and the effect is very good and the effect is long.

In the prevention and control of cabbage insects, we must pay attention to the above two problems, grasp the best control period before the second instar of the larvae, and do not mistakenly think that when there are more insect pests, the medicine can be prevented and controlled. In the application of the drug, do not use a single agent, scientific research on the use of drugs, to maintain the effect of the drug.

Because there are generally some small insect eggs, there is no way to prevent them at this time, and there are generally a lot of small insect eggs, so it will cause such an impact.

It is because this insect has a strong resistance to drugs and survives more secretively, so it will lead to this situation and reproduce very quickly.

Because this animal is very adaptable, when this animal was discovered, this animal had already multiplied a lot, and the ** time was missed.

Because this animal reproduces very quickly, and this animal is very difficult to find, when it is found, it has already lost its chance.

1. Cabbage worm and cotton bollworm: the larvae mainly eat leaves, gnawing on the mesophyll, leaving a layer of transparent epidermis; After 3 instars, it can eat away at the entire leaf, the insect population is accumulated, and only the leaf veins are left, and the growth and development of the shadow knows the age of bending and the core, resulting in reduced yield, reducing the value of the commodity, and can also lead to soft rot. The agent can be matrine, which has a good effect on the prevention and control of vegetable pests such as vegetable aphid, cabbage worm, cotton bollworm, red spider, etc.

2. Vegetable aphid: sucking plant juice on the back of the leaf, causing poor plant growth, and polluting the foliage due to a large amount of excretion of honeydew and molting, reducing the commercial value of vegetables. In addition, the losses caused by the transmission of viral diseases are far greater than the aphid infestation itself.

3. Whitefly and whitefly: also known as small white moth, adults and nymphs concentrate on the back of the leaf to suck plant juice, causing the leaves to fade, turn yellow, wilt, and secrete honeydew at the same time, pollute the leaves, induce coal pollution disease, affect the photosynthesis and respiration of plants, and can transmit viral diseases. It can be evenly sprayed with 60-80 meters per mu and 1500 times of water.

4. White whitefly and whitefly: larvae infiltrate the leaffinch and petioles, producing irregular snake-shaped white insect channels, chlorophyll is destroyed, affecting photosynthesis. When there are 5 larvae in a leaf of the affected plant, the insect passage is very small, spray 3000 times of Efudine EC or 800-1000 times of 48% Lesben EC.