Green pepper tea yellow mite is extremely harmful, what conditions are green pepper tea yellow mites

The damage period of tea yellow mite in Meitan County is May and August, and the peak period of damage is June and July. The optimal temperature for the development and reproduction of tea mites is 16 23 and the relative humidity is 80 90. Due to the higher temperature, more rain and higher humidity in June and July, it is especially conducive to the reproduction of tea yellow mites.

Green pepper tea yellow mite is prone to appear when it lacks nutrients, and it needs to be removed by applying pesticides to avoid affecting crop yields.

The optimal temperature for the growth and reproduction of green pepper tea yellow mite is 16 - 23 , and the optimal relative humidity is 80 - 90%, so the warm and humid environmental conditions are conducive to its growth and development.

When the environment in which the chili tea is located is not ventilated, there is no sunlight, and it is relatively humid, it is very easy to produce yellow mites of chili tea.

It is very easy to occur when the temperature is relatively high and the humidity is relatively high, and the air permeability and water absorption of the soil are not good, it is also very easy to occur yellow mites, so you should buy some pesticides to hit the leaves of peppers, which can be prevented.

It is easy to cause such insect pests when the temperature is relatively high and the air is relatively humid, and this insect pest is suitable for survival in such an environment.

The adult mites and young mites of the yellow mite of pepper tea are concentrated in the young leaves of pepper and suck for damage, the back of the affected leaves will be gray-brown or yellow-brown, with oily luster or oil-soaked shape, the leaves are curled outward, the leaves are narrowed, and the flowers and leaves are seriously dropped, the flowers and fruits are dropped, and the yield is greatly reduced.

The general symptom of this disease is that it will be deformed, and there will be many gray-brown spots on it, which will wilt, and there is no way to bear fruit, so it will also cause root rot.

First of all, there will be a lot of spots on the bell peppers, and there will also be gray-brown spots with a greasy sheen on them, and the plants will also be deformed, and the growth rate will be relatively slow, and the leaves will also roll up.

The specific symptom is that the leaves will be deformed, and they are yellow-brown or gray-brown, curl downward, drop flowers and fruits, and are especially easy to wilt.

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.

Implement crop rotation, when introducing vegetable seedlings, it is best to introduce vegetable seedlings from mite-free areas to prevent the initial infection of insect sources from entering disease-free areas and clean the countryside. Weeds in vegetable plots and sheds should be burned or buried deeply.

1.Try to control the humidity in the shed as much as possible. Ventilation is repeated to reduce the humidity in the shed. 2.These germs can be killed by spraying pesticides.

You can choose a more suitable pesticide, and regularly spray pesticides for insect repellent treatment, which can remove the plants with more serious tea yellow in time, and you can avoid other plant infections.

When there is this disease, we must use medicine to completely remove it, so that our plants can be protected from it.

Pepper sunburn is a physiological disease caused by direct sunlight. The pepper fruit is solid, the sunny side fades green and hardens, and the epidermis of the diseased part loses water and becomes thin and easy to break. The diseased part is prone to anthrax or limb saprophyte by some saprophytic bacteria, and grow black mold or rot.

Prevention and control methods, the use of shade net covering, avoid direct sunlight, timely and appropriate amount of irrigation to supplement soil moisture, to prevent the plant body temperature rise, fruit water loss and sunburn, reasonable dense planting; Shield the stems and leaves from each other to avoid direct sunlight on the fruits; After the diseased fruit is found, it should be removed in time, and the medium and trace elements should be supplemented in time after the fruit is formed, such as calcium, magnesium, boron, zinc, manganese, iron, molybdenum, etc., and foliar sprays can also be applied to Aiduo and brassinolide to improve the comprehensive resistance of plants and reduce the occurrence of sunburn.

(1) Agricultural prevention and 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.

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.

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.

Compound essential oil can have special effects on tea yellow mites on various crops, is a physical insecticidal preparation, natural toxicity, tasteless and no residue, successfully developed by Cangzhou Jiahe Biotechnology!

Tea yellow mite, distributed in many countries, the most widespread distribution in the tropics, and in the temperate zone is in the greenhouse damage, in recent years there is a tendency to spread to the field.

The eggs of the tea yellow mite are oval, millimeters long, colorless and transparent. The larvae mites are oval, pale green, have 3 pairs of legs, and the cephalothorax is similar to the adult mites, but there are no false valves. If the mites are oblong and slightly fusiform.

Female adult mites are oval, broad, and about millimeters long. Male adult mites are approximately hexagonal in shape, with a conical end and about a millimeter long.

The life cycle of the tea mite is short, below 28 30, and it takes 4 5 days to complete a generation; 18 20 for 7 10 days. In tropical and greenhouse conditions, it can occur all year round, but the reproductive ability in winter is low, the eggs are scattered on the back of fresh leaves or fruit depressions, sometimes on young shoots, firmly attached to a flat bottom, the eggs hatch into young mites after 2 3 days, and the development of mites and adult mites takes 2 3 days each.

The optimal temperature for breeding is 16 23 and the relative humidity is 80% to 90%. When the temperature reaches 35, the life span of adult mites is shortened, the reproductive ability is reduced, the growth is stunted, and the normal reproductive ability is lost. Humidity has little effect on adult mites, and eggs and young mites only hatch and grow under conditions above 80% relative humidity.

The symptoms of the harmful plants are similar to those of the virus, which is often manifested as stiff and thickened leaves, downward curling of leaf margins, light yellow, yellow-brown or black-brown leaves or other parts, and oily luster on the back of the leaves, while stems and fruits lose their original luster.

At present, the control method is mainly chemical control method, spraying with 800 times of 57% gmite, and the control effect can reach 84%.

Tea yellow mite life cycle is short, fecundity is very strong, should pay attention to early control, spraying the focus is on the new leaves and young stems, the liquid must be sprayed on the back of the leaves, young stems, flowers and young fruits, otherwise the control effect can not be achieved.