Thrips pest control methods, thrips harm crops, how to control thrips pests?

1. Remove diseased branches and leaves.

Before the occurrence of thrips insect infestation, you can choose to cut some diseased branches and leaves in winter, remove the weeds next to it, and then destroy them together, which can greatly prevent the occurrence of insect infestation.

Thrips. 2. Soil disinfection.

Before planting, it is necessary to treat the soil and disinfect the soil used for planting in advance to remove the eggs that may be contained in it. For some sown plants, the seeds can be mixed with a small amount of pesticides when sowing, and then buried in the soil, which can also have a preventive effect on insect pests.

3. Protect natural enemies.

In order to prevent the occurrence of thrips insect pests, it is also necessary to protect natural enemies, such as aphid flies, mantises, lacewings, etc., which can play a role in counterbalancing thrips, and are very safe and will not harm the plant itself.

Thrips. Fourth, hang the blue sticky insect board.

Thrips are blue-trending and will fly to blue places, and according to its characteristics, some blue sticky insect boards can be hung next to the plant.

5. Spray drugs.

If there are many thrips insect infestations, you need to spray the drug, which can be purchased at a pesticide store. Dilute the spraying solution according to the instructions, and buy several alternates to avoid resistance. Thrips are more afraid of light, so it is best to choose to spray in the evening, and pay attention to spraying evenly and finely when spraying.

The prevention and control of thrips should be based on comprehensive control, not simply with pesticides, but also through agricultural control and physical control.

The main purpose of agricultural control is to reduce the source of insects and destroy the growth environment that thrips like, so as to reduce the harm of thrips;

Physical control is still dominated by yellow plates and backboards, because most pests have a tendency to yellow, and thrips have a unique tendency to blue;

The focus of pesticide prevention and control is in the selection and use of pesticides, in recent years, thrips resistance has risen very quickly, in the past few years with imidacloprid, acetamiprid, cypermethrin, deltamethrin these drugs can achieve control effect, these two years can not be directly cured, have to use spinomycin, ethyl spinosad, now even spinomycin has great resistance, many places have the use of spiromethol ethyl ester for control, but still need to be compounded, rotate the use of pesticides, the effect will be better.

Thrips should be prevented in advance, do not wait until it is flooded before applying medicine, plant vegetables during high temperatures, if not covered with mulch, it is best to spray the middle and lower parts of the plant and the ground at the same time, because these places are the habitat of thrips nymphs. , if thrips have happened, spray pesticides, after five o'clock in the afternoon, six or seven o'clock the best effect, insects come out of hiding places to feed, spray carefully when spraying, key parts must be sprayed, tender shoots, flowers for thrips intensive feeding area, must be sprayed, <>

Thrips have the characteristics of diurnal and nocturnal, prefer to inhabit the middle and lower parts of the plant and the ground and crevices, thrips are relatively hidden, have a preference for blue objects, and like sweetness. 10% thiamethoxam water dispersible granules 5000 times liquid, matrine water 400 times liquid and other sprays, several kinds of can also be compounded, once in 5-7 days, even prevention 2-3 times can play a good effect, pay attention to the agent to be used frequently in rotation to avoid the appearance of drug resistance effect deterioration.

If thrips are more harmful to fruit trees, 25% thiamethoxam can be used, but the dosage should be increased, such as 800 times spray, and microemulsion avermectin barrels can be mixed. Zucchini, beans, kidney beans, flowers, ginger and other crops, and the replacement of these crops also provides a good shelter for thrips to continue to breed. In the vicinity of growing figs, thrips have a tendency to develop hazards towards figs.

Thrips insects like to eat the tender leaves, stems and flowers of crops, the juice in the fruit, and then the leaves will wither, the flowers will wither, and the fruit will fall when it is not ripe, which affects the yield of the animals. When spraying, you should wear professional clothes and masks, pay attention to your own safety, generally in the evening spraying is better, thrips like to come out at night, and then you can also deal with personal hygiene.

Pesticides. Because pesticides can kill thrips insects and will not harm crops, they can be controlled by using pesticides.

Take precautions against thrips infestation before they appear, prune the diseased branches and leaves in the winter, remove weeds from the side, and destroy them together. The soil is disinfected in advance to remove possible eggs, mixed with a small amount of pesticide at the time of planting, and then buried in the soil. It is also necessary to protect natural enemies, such as aphid flies, mittings, lacewings, etc.

Thrips are blue-trending and can be hung with blue sticky insect boards next to the plants. If the prevention is not in place, it is necessary to spray the drug, and buy several kinds of alternate use.

In early spring, remove weeds and dead branches and leaves in the field, and burn them intensively or bury them deep to eliminate overwintering adults and nymphs. Strengthen fertilizer and water management to promote the growth of plants and reduce damage. Taking advantage of the blue habit of thrips, blue sticky plates are set up in the field to trap and kill adults, and the height of the sticky boards is the same as that of crops.

It should be watered frequently, and the branches and leaves should be pruned, and some chemical fertilizers should also be put in, only some cow dung, pig manure, to maintain reasonable nutrition, so that thrips insect pests can be controlled.

Thrips insect pest control methods include agricultural control, physical control and pesticide control, agricultural control needs to remove weeds in the field when the number of taulownia, concentrated burning or deep burial, eliminate overwintering adults and nymphs, reduce insect sources, strengthen water and fertilizer management, and promote the growth of plants. Physical control can hang the blue plate between the crop rows, because thrips have a tendency to blue, you can use this characteristic to drive the thrips to fly to the blue plate, and clean up the pests on the board in time.

Introduction of thrips

Thrips is a general term for the insect class Tasseloptera, the larvae are white, yellow, or orange, and the adults are yellow, brown, or black, feeding on plant juice or fungi, and are one of the important economic pests.

Thrips occur all year round, mainly in the open field in spring, summer and autumn, and mainly in greenhouses in winter, harming eggplant, cucumber, kidney bean, pepper, watermelon and other crops.

Thrips like warm, dry weather, its suitable temperature is 23 28, when the temperature reaches 31, all the nymphs die, in the rainy season, if it is cloudy and rainy, the leaf axils of the green onion are waterlogged, which can lead to the death of nymphs.

The control methods of thrips insect pests include: soil treatment, seed dressing treatment, etc.

1. Soil treatment.

Before planting cucumbers, watermelons, tomatoes, peppers, eggplants and other vegetables, use 5% thiamethoxam granules 500 1000 grams + 30 kg of rotten organic fertilizer, mix evenly and then sprinkle, furrow or hole application, thiamethoxam is a neonicotinoid insecticide, has good water solubility and systemic conductivity, slowly dissolves in the soil, evenly distributes the round stool agent around the crop roots, is absorbed by the root system, and is transmitted to all parts of the upper part of the plant.

It has the advantages of simple operation, good safety and long validity period, which can greatly reduce the input of labor.

2. Seed dressing treatment.

Before sowing corn, garlic, potato, peanut, soybean, cowpea and other direct seeding crops, 40% bromoyl thiamethoxam seed treatment suspension can be used to mix seeds according to the ratio of 1:200 300, or 27% benzoyl thiamethoxam suspension seed coating agent is used to dress seeds according to the ratio of 1:400, and the seed coating agent is evenly wrapped on the seed surface.

Manifestations of thrips infestation:

1. The new leaf is deformed, and the leaf tip is blackened.

Thrips are the most likely to eat the young twigs and leaves of the moon season, and are usually the most harmful to the new branches of the moon season, and the orange brigade is characterized by the smaller, distorted, and deformed new leaves, and the tips of the leaves will be accompanied by brown or black scars.

If the leaves have grown and matured, the thrips will cause the young leaves to appear uneven, brown scars, and some leaf tips are deformed or black and wilted.

2. Scars of old leaves.

If there are no new shoots for a long time, at this time, the thrips have no choice but to eat the old leaves, brown scars appear on the old leaves, and the leaves will also appear uneven when it is serious, and the whole leaf looks very vicissitudes and has no luster. The sprouts that do not grow will also turn black and wither.

1. What medicine works best?

1. Rice seedling stage: If infected thrips, it is recommended to use thiamethoxam varieties, especially the selection of Bairui 35% thiamethoxam suspension seed coating agent, which can be sprayed on the rice leaves after dilution, and pay attention to the front and back to spray, so as to have an effect.

2. Vegetables: If cultivated vegetables are infected with thistle Feng Haoming horse, 25% thiamethoxam water dispersible socks slip agent 3000-5000 times water bulk granule can be used, which can not only reduce virus diseases, but also reduce the harm of other underground pests.

3. Tobacco: If tobacco crops are infected with thrips, 1000 times of 25% imidacloprid or 3000-5000 times of 25% thiamethoxam. In addition, for early prevention, you can irrigate the roots with medicine at the time of transplanting.

4. Fruit trees: thrips in fruit trees are the most serious harm to mango fruits, 25% thiamethoxam can be sprayed, pay attention to increase the amount of silver, you can use 800 times spray mixed with avermectin barrels.

Second, how to prevent and control.

While preventing thrips in the first place, in addition to spraying drugs, it is necessary to strengthen management. In daily life, we should weed frequently to reduce the source of insects. At the same time, fertilizer and water management should be strengthened to promote the growth of crops and plants, thereby improving disease resistance.

In addition, physical control methods can also be used, taking advantage of its blue-trending habits, and blue sticky boards can be set up to trap and kill adult insects.