How to control tea yellow mites? Bell pepper tea yellow mite is extremely harmful, how to prevent an

1) Agricultural control.

Clean the countryside. Eradicate weeds in the field in time, remove dead branches and fallen leaves in time after vegetable harvest, concentrate on burning, and strengthen the prevention and control of autumn and winter vegetables and tea yellow mites, which can reduce some insect sources. Cultivating clean seedlings.

The north should do a good job in the prevention and control of seedling greenhouses in autumn and winter, and avoid bringing mites from seedling greenhouses into production greenhouses or greenhouses and other protected areas. At the same time, attention should be paid to removing weeds and residues inside and outside the greenhouse, and paying close attention to the prevention and control in the greenhouse and other protected areas to reduce the source of mites moving into the open field.

2) Biological control.

At present, the natural enemies available for the control of tea yellow mite include Blunt Nissini, Blunt T. deli, Tonorium longiflora and P. parviflora.

3) Chemical control.

When the rate of leaf curling in the field reaches 2 3 heads (grains) per leaf, the average number of insects or eggs per leaf reaches 2 3 (grains) should be sprayed in time. The focus of the spraying is on the upper young part of the plant, especially the underside of the top few young leaves. Commonly used agents can be used 73% alkyne mite emulsifiable concentrate 1000 1200 times, 35% pyridoxine 1000 times, 20% pyridazine thionine 1000 times, 5% thiobenone emulsifiable concentrate 2000 times, etc., all of which have good control effects.

Because the body of the tea yellow mite is very small and not easy to detect, the early investigation needs to be judged according to the damaged plant. After planting and slowing down the seedlings, the vegetables in the protected area should be investigated and treated in time when it is found that individual plants have symptoms of damage, so as to prevent further expansion and spread. The peak period of yellow mites in spring and autumn tea needs to be treated regularly with an interval of 7 to 10 days.

The focus of spraying is mainly on the young leaves, young stems, flowers and young fruits on the upper part of the plant, and pay attention to the rotation of medicine.

The prevention and control of tea yellow mite should be comprehensively used in agricultural control, biological control and pesticide control measures, and timely treatment should be selected and treated when the spot occurs.

1) Do a good job in the prevention and control of winter nurseries and production greenhouses, eradicate weeds around sheds and rooms, remove dead branches and leaves in a timely and thorough manner after harvesting, and eliminate the source of overwintering insects.

2) Cultivating insect-free seedlings. Before transplanting, the seedlings were comprehensively controlled with pesticides.

3) The available natural enemies of the tea mite include Nissini blunt mites, De's blunt mites, tumorous long-bearded mites and small flower bugs.

4) When it is necessary to carry out chemical control, it is necessary to pay attention to the selection of pesticides with low lethality to natural enemies, and pay attention to the rotation of different types of pesticides to avoid harming natural enemies and causing pest mites to develop resistance.

Prevention and control methods: Agricultural control: try to eliminate the tea yellow mite in the protected area and clean the field to reduce the damage on the open field vegetables in the following year.

Cultivating mite-free seedlings: spraying pesticides to kill mites before planting, and early maturing varieties can be selected, planting early and harvesting early to avoid the peak of pest mites. Pharmaceutical prevention and control:

In the early stage of the occurrence of the following agents for spraying, generally every 7 10 days spray 1 time, spray 2 3 times, spray all parts of the spray, especially the growth point, the back of young leaves, young stems, flowers and young fruits. You can choose 20% dicofol, 25% quinthion EC, 20% pyridazion 1500 times EC, or 5% Nisolan EC, 50% tricyclic tin wettable powder or kill (21% synergistic cyanoma EC).3000 times of 5% Uranus (bifenthrin) emulsifiable concentrate, or 1000 times of 73% alkyne mite emulsifiable concentrate, or 1000 1500 times of 25% acaricide wettable powder, or 1500 2000 times of 40% cycloprofenofol wettable powder, or 1000 times of 20% compound liuyangmycin.

Tea yellow mites, also known as tea young leaf mites, tarsal mites. The eggs are scattered on the back of young leaves, the recesses of young fruits or young buds, hatched after 2 3 days, the young mite period is about 2 3 days, and the mite period is 2 3 days. The optimal temperature for development and reproduction is 16 23 and the relative humidity is 80% 90%.

The duration of generational development is 28 30 days, which is 4 5 days; In 18 to 20, for 7 to 10 days. Adult mites are lively, have strong tenderness, eggs and young mites have high requirements for humidity, and can only develop when the relative humidity is above 80%, so the warm and humid environment is conducive to the occurrence of tea yellow mites. Due to the continuous expansion of the cultivation area of the protected area, the tea yellow mite can occur all year round in the middle and lower reaches of the Yangtze River, and the reproductive ability of the tea yellow mite in winter is low.

In the greenhouse, the damage starts in late April, and the peak season is from late June to mid-September, and the winter is mainly overwintered in the greenhouse.

Tea yellow mite mainly harms eggplant, tomato, cowpea, kidney bean, green pepper, etc., and eggplant and pepper are the most serious. The juice is usually sucked by adult mites and mites concentrated in the tender part of the eggplant or pepper. The symptoms of tea mite damage on the back of the leaf are obvious, which is reflected in the curl of the affected leaf to the back of the leaf, and the mesophyll is oily pink, which has brownish-yellow or brown dots, and the leaf or young stem is twisted and deformed in severe cases; Tea mite mostly occurs in leaf tips, with the main damage site of 3 4 leaves below the growth point.

When the fruit is harmed, yellow-brown pinhole-like spots are formed on the surface of the fruit stalk, peel and sepals, and the fruit loses its luster, stiffness and cork, which seriously affects the edible value.

Control methods: The control of tea yellow mite is relatively simple, but due to the short life cycle and fast reproduction of tea yellow mite, special attention should be paid to early control. 2,4-D pesticide damage and thrips damage also have similar symptoms (leaf curling) to tea mite damage, but they can be distinguished from the damaged parts, the color of the affected leaves, and the main oil stain.

Pesticide control is controlled once every 7 10 days, and applied 3 times as appropriate, which can control the hazard. It can be used 2000 3000 times of insect mite light emulsifiable concentrate, or 20% mite net 2500 4000 times, or 40% tachycarnone 4000 4500 times, or 73% gite emulsifiable concentrate 2000 times, or 5% nisolan emulsifiable concentrate 2000 times, 1% insecticide 2000 times liquid, 20% metformamidine emulsifiable concentrate 1000 times liquid, 21% killing emulsifiable concentrate 2000 times liquid, Uranus emulsifiable concentrate 3000 times liquid spray. In addition, plant residues and weeds should be removed in time in winter to reduce the source of overwintering insects.

1) Harmful characteristics Adult mites and young mites gather in the young parts of the plant (such as growth points, new leaves, flower buds and fruits) to suck the sap, causing deformity of the damaged plant, such as leaf rolling, leaf shrinkage and leaf thickening and stiffness, making the back of the leaf yellow-brown, and the leaf has oil-soaked luster. When the flower bud is damaged, it forms a deformed flower. After the young stems are damaged, they turn yellowish-brown and twist and deform, so that they dry up and bald.

If the young melon is damaged, it is stiff and deformed, and it cannot develop normally.

2) prevention and control methods 73% gram mite emulsifiable concentrate 2000 times liquid, 25% mite exterminating mite wettable powder 1000 times liquid, killing 2000 times liquid, 10% Uranus emulsifiable concentrate 3000 times liquid, 20% exterminating 800 1000 times liquid, 3000 4000 times of eupsifiable concentrate of toss mite mite, 45% sulfur gum suspension 150 300 times liquid, Qi mite emulsifiable concentrate 3000 4000 times liquid, any one of the above agents, sprayed every 10 14 days, focusing on spraying the front of young leaves and stem ends, Squirt 3 times in a row.

At this time, field management can be strengthened, and the weeds in the field should be removed at this time, and then some pesticides should be used, and they must be sprayed in the upper part of the live broadcast when spraying, so that they can be well controlled.

First of all, you can choose varieties with strong insect resistance, and secondly, you can spray drugs to control them.

1. Tea yellow mites suck plant juice around the young shoots, young leaves, flowers, fruits and other tender parts and growth points of vegetables with adult worms or, resulting in plant deformity and slow growth.

2. The back of the affected leaf is gray-brown or yellow-brown. It has an oily luster or oil-soaked shape, the leaves are stiff and straight, and the edge of the leaves is rolled downward;

3. There are often yellowish-white dots or rust-colored spots on the front of the leaves; The injured young stems and shoots often turn yellow-brown, twisted and deformed, and the top of the damaged stem and shoot is often dead;

4. The damaged buds and flowers generally fail to bloom and bear fruit, forming shriveled flowers and fruits. The fruit is damaged, the fruit stalk and peel are yellow-brown and the wood is corked, and the luster is lost, and the peel is cracked in the later stage, and the taste is astringent and uneatable.

The damage of tea yellow mite has obvious tenderness, often concentrated in the young buds, young leaves, young stems, flowers, buds and young fruits of colored bell peppers, etc., the affected leaves are thickened and stiff, the back of the leaves is gray-brown or yellow-brown, oily, twisted and deformed, and the leaf margin is curled downward; The young stems of the victim turned yellowish-brown, and the lateral branches were clustered and bald. The flowers, buds, and young fruits all turn yellow-brown, and the surface of the fruit is rough and yellow-brown, and the fruit is corked. The plant is dwarf, and when the damage is serious, it will cause flower and fruit dropping.

There will be a lot of damage, it will most likely lead to a decrease in yield, and it will also cause the leaves to turn yellow, and it will also cause these bell peppers to be harmed by these pests, and it will also affect the economic benefits.

<> agricultural control: cultivate insect-free strong seedlings, clean up weeds, stubs, and lost leaves in the field to eliminate overwintering insect sources, strengthen ventilation, reduce humidity, and create an environment that is not conducive to the reproduction of tea yellow mites.

Drug prevention and control: At the initial stage of the occurrence, spray 1000 times of 35% acaricidal emulsifiable concentrate, or 1000-1500 times of 5% Kathic emulsifiable concentrate, spray 1 time every 7-10 days, and spray 2-3 times in a row.

First, the nemesis soil method of tea yellow mites

1) Agricultural control.

1) Cultivate insect-free seedlings, and clean up weeds, stumps, and fallen leaves in the field to eliminate the source of overwintering insects.

2) Enhance ventilation and reduce humidity on the premise of ensuring the temperature of the shed, so as to create an environment that is not conducive to the growth and reproduction of tea yellow mites.

3) Protect the natural enemies of the tea yellow mites, such as the small flower bug, the tumorous long-whiskered mite, the Nisslib mite, and the De's blunt mite.

2. Drug prevention and treatment.

1) Spray 4000-5000 times of avermectin EC, or 1500-2000 times of 5% thiobenone EC, or 1000-1500 times of 5% fipronide EC, or 3000-4000 times of 20% tachydinone wettable powder.

2) In the early stage of insect infestation, spray 2000 times of 5% Nisolan EC, or 1000 times of 35% acaricidal EC, or 1000-1500 times of 5% Kaclog EC, spray once every 7-10 days, and spray 2-3 times continuously.

Second, what crops are harmed by tea yellow mites

1. Tea yellow mite will harm radishes, celery, tomatoes, cucumbers, loofahs, peppers, beans, cowpeas, eggplants, potatoes, bitter gourds and other vegetable crops, pears, apples, citrus, tea trees, tobacco and other fruit trees and cash crops, as well as chrysanthemum, cyclamen and other ornamental plants.

2. If mites, young mites, and adult mites will concentrate on the young part of the plant to suck and cause damage, the back of the damaged leaves will become gray-brown, yellow-brown, and have an oily luster or oil-soaked shape, and the edge of the leaf will curl downward.

3. The young stems and shoots will turn yellow-brown after being damaged, and twist and deformity, and the top of the plant will die when the situation is serious.

4. The damaged flower buds and flowers cannot open normally, which affects the crop yield.

For prevention, it is recommended to dilute avermectin 2000 times once a month or so. Do not use it often. About three points poisonous.

Generally, avermectin is also used for about three seasons. When spraying, spray evenly, but also spray the back of plant leaves and soil. You can also use Dedabilin, Jin Wanzhi, Domineering Ridge, etc.

Spray according to the directions for use. In addition, it is necessary to deal with weeds in the crop field and keep the crop environment as clean and tidy as possible. Methane and infrared also have a certain killing effect on the subyellow mite, the pests and diseases are greater than **, the loss must be, and many farmers and friends should prevent it in advance as much as possible, so as not to affect the yield and taste of tea.

Hope to help this friend.

The body of the sex mite is ovate, millimeters long, light yellow to orange, translucent, shiny. Four pairs of feet with a white strap on the back. The end of the abdomen of the female is flat, and the end of the abdomen of the male is conical.

ovate, about millimeters long, gray and white, transparent. The oval surface has 5-6 rows of longitudinal protrusions. The pups are oval, milky white, with three pairs of legs, a white band on the dorsal back of the body, and a bristle at the end of the abdomen.

Rhomboids and translucency are the stages of temporary cessation of development, surrounded by the epidermis of young mites. Tea yellow mites can breed up to their 20s a year and can live all year round in sheds. Polyyellow mites are mainly hermaphroditic and can also reproduce with high cancer, but the albuminization rate is low.

Females scatter eggs on the back of watermelon leaves, in avocados, or in buds. Females live up to 17 days, a minimum of 4 days, and an average of days. The development period is different at different temperatures.

A warm and humid environment contributes to the occurrence of tea yellow mites, so it is more likely to occur when growing watermelons in a membrane chamber. Tea is mainly spread by creeping and wind, and can be spread inside the warehouse through field management, clothing, farming tools, etc.

The growth point is wilted, the leaf edge is curled back, and the leaf is shiny behind the leaf, the harmful symptoms of the hypoxanthus mite are very similar to those of the viral disease, but the main difference is that in the painting above, there is no streamer on the back of the viral diseased leaf, and in another case, if there are no totally poisonous insects, etc., it will not be detailed here. There are many ways to prevent **, these can be found in the data, we sprayed avermectin 2000 times twice, and the effect was obvious one week apart. After three days of spraying, observing the appearance of the green pepper plant, it can be found that the side buds are significantly released, and the performance is good after one week of spraying, and the performance is better after one month of spraying.

After the injection of the drug, the growth points in the upper part are rarely present, and the growth points on the axillary side of the leaf are more. The plant population can be reconstructed by pruning to remove the upper part.

The calendar time of the generations of the subyellow mite is very short. The warm and humid environment favors its series and occurrence. The room temperature is suitable, and it can happen all year round.

From mid to late June to mid-September, it is time for an erection. Mainly hermaphroditic, poisonous female reproduction can also be carried out, and most of the eggs of Hypoxanthus are laid on the back of young leaves and in the hollows of fresh fruits.