Cauliflower cabbage insects are very common, how to prevent them?

Speaking of the natural enemies of vegetables, we have to mention cabbage worms, cabbage worms are the most powerful insects that eat vegetables, and they are also the insects that are most likely to affect the harvest, but many farmers actually don't know how to control cabbage worms, so how should cabbage worms be controlled? There are three main methods1. Focus on protecting the natural enemies of cabbage insects; 2. Pay attention to the hygiene of the vegetable planting base; 3. Use pesticides when necessary.

1. Focus on protecting the natural enemies of cabbage worms First of all, there are natural enemies in the food chain, cabbage worms are the natural enemies of vegetables, and these small insects also have natural enemies, some small bees common in rural areas are the natural enemies of cabbage worms, such as butterfly golden bees, red-eyed bees, etc., these small bees will not only collect pollen, but also kill cabbage worms and other hateful insects. Therefore, farmers can not drive away these little bees when they see them, and they can also plant some flowers in the vegetable field to attract baby bees, which is also very helpful to prevent cabbage worms.

2. Pay attention to the health of the vegetable planting baseSecondly, many people only know that they should pay attention to hygiene at home, in fact, the vegetable planting base also needs to pay attention to hygiene, the home is dirty and messy, it is easy to appear mice, cockroaches and other pests, and the vegetable planting base is too dirty, it is easy to attract all kinds of pests to come. Therefore, farmers who grow vegetables must regularly weed, fertilize, and loosen the soil for vegetable fields to ensure the cleanliness and hygiene of vegetable planting bases, so as to reduce the probability of pests such as cabbage insects.

3. Use pesticides when necessaryFinally, now more and more people are pursuing natural vegetables, and many vegetable planting bases have played a "natural pollution-free", "no pesticides and no insecticides" signboards, but in fact, this blind pursuit of nature is not correct, when encountering serious insect pests, in order to ensure that vegetables are not completely harmed, it is still necessary to take measures in time, and spraying pesticides is the most effective way, when you are not surprised, you should spray or spray.

In winter, the eggs can be removed manually, or they can be cultured after the seedlings emerge, such as green worm fungus No. 6 and killing cream.

First of all, when the seedlings emerge, it is necessary to start spraying regularly, spraying once every 7 days, spraying 2 or 3 times in a row. It can be sprayed with pesticides, and the green worms should be cleaned up in time after they are found. In this way, it can be effectively prevented.

It can be trapped, using the phototaxis habit of diamondback moths to trap adults with black light or other light sources at night from 7:00 to 10:00.

1. Agricultural control: continuous cropping with non-cruciferous vegetables, after the crop is harvested, the residues and weeds are cleaned up to reduce the source of insects in the field. 2. Biological control:

Before the 3rd instar stage of larvae, use 100-300g of 8000IU mg of Bacillus thuringiensis wettable powder or 200-300ml of 2000IU of Bacillus thuringiensis suspension mixed with water 30-45kg dilution spray per mu. 3. Chemical control: 2000-3000 times of 40% chrysanthemum emulsifiable concentrate, 2000-3000 times of 40% chrysanthemum emulsifiable concentrate, 1500 times of 50% phoxanthion emulsifiable concentrate, etc.

1. Prevention and control methods of cabbage insects

1. Agricultural prevention and control.

1) Try to avoid continuous cropping with cruciferous vegetables.

2) After the crop is harvested, the residues and weeds in the field should be cleaned up in time to reduce the source of insects in the field.

2. Biological control:

1) Release natural enemies of cabbage insects such as butterfly pupae golden wasps, red-eyed wasps, and reddish cocoon wasps in the field.

2) Foliar spray of BT wettable powder 800 times.

3) Before the 3rd instar stage of larvae, use 100-300g of 8000IU mg of Bacillus thuringiensis wettable powder, or 200-300ml of 2000IU L Bacillus thuringiensis suspension mixed with water 30-45kg dilution spray per mu.

4) Use rapeseed butterfly particulate virus agent for prevention and control.

3. Chemical control.

At the peak of larvae, use a chemical to kill cabbage insects, spray every 10-15 days, a total of 2-3 times. Common agents are 40% chrysanthemum EC 2000-3000 times, 40% chrysanthemum EC 2000-3000 times, 50% phoxanthion EC 1500 times, 10% Uranus EC 8000-10000 times, 20% Mapelik EC 3000 times, 25% chrysanthemum EC 2000-3000 times, 21% kill EC 4000-5000 times, 10% cypermethrin EC 2000-3000 times, 5% Nongmengte emulsifiable concentrate 3000 times, Kung Fu emulsifiable concentrate 4000-5000 times, 20% 2000-3000 times emulsifiable concentrate.

2. What is the adult worm of cabbage worm?

1. The adult of the cabbage insect is the cabbage butterfly.

2. The body length of the butterfly is 12-20mm, the wingspan is 45-55mm, the body color of the male is milky white, and the female is light yellowish white. The anterior edge and base of the forewings of the female are mostly black, with a large triangular black spot at the apex angle, two black round spots on the outer side of the middle wing, and a grayish-black base of the hindwings, with a black spot on the front margin. The front of the forewings of the male is grayish-black, and there are two black spots in the middle and lower parts of the wings (the front black spots are more pronounced).

3. The butterfly egg stage is about 4-8 days, the larval stage is about 11-22 days, the pupal stage is about 10 days (non-overwintering pupa), and the adult stage is about 5 days.

1. Disinfect the soil before planting. It can be sprinkled with disinfectant powder or irradiated with ultraviolet light. Kills eggs in the soil. Reduce the occurrence of pests and diseases.

2. It is best to choose the way of crop rotation, don't plant vegetables all the time, you can make some other plants. This can effectively reduce pests and diseases.

3. You can use manual capture methods. In the early morning or late afternoon of the day, it is the time for cabbage worms to eat, and at this time they will be infested in large numbers. Once you can see it, capture it and destroy it.

4. Spray pesticides. For large-scale planting, spraying pesticides is a very effective control method.

5. Use biological methods for prevention and control. Cabbage worms have many natural predators, such as spiders, ladybugs, and praying mantises. Dragonfly. and other creatures are their natural enemies, and the introduction of these small animals can use biological methods to kill the cabbage insects on the greens.

If you want to control cabbage insects, you should use pesticides to prevent and control Chinese cabbage. In addition, it is necessary to breed excellent varieties, pay attention to reasonable field management, effective watering and fertilization.

Generally speaking, the method of spraying the plant ash leaching solution can effectively control the cabbage insect, especially the method of spraying the plant ash leaching solution can effectively help vegetable farmers kill the eggs of the cabbage worm, and minimize the damage of the cabbage worm to a certain extent.

You can use plant ash, so that you can better control it, and you can spray some pesticides, which can also better solve the problem.