How does the damage of wolfberry rust mite occur? How can we prevent it?

The reason is that wolfberry rust mites overwinter in the bark crevices, buds and axils as adult mites, and in late April of the following year, wolfberry begins to be active after the leaves are spread, and the adult mites begin to sting and migrate to the leaves for harm. The control method is to thin the diseased residual branches in the dormant period, and the stubbing pruning of fruit branches has a significant effect on reducing the number of rust mites overwintering. Choose to plant acar-resistant varieties.

Increase the application of organic fertilizer, reasonable combination of phosphorus and potassium fertilizer, enhance the tree potential, improve the ability of the tree to resist mites.

It is mainly because of the lack of scientific and reasonable fertilization and water control. Once the plant is found to be sick, it should be used in time to spray the plant leaves evenly, and do not water it temporarily during the medication, otherwise it will reduce the efficacy.

Goji gall mite, gall mite is also a type of mite. Gall mites burrow into the leaf tissue and feed on them. Damage to young stems and leaves, the damaged leaves form yellow-green, round, raised bulges, twisted leaves, unable to grow.

Lycium rust mite mainly harms the leaves and is very harmful to the production of wolfberry. Rust mites are invisible mites that are mainly found on the back of leaves and on both sides of the main veins of leaves. Powdery mildew occurs on the leaves of wolfberry, harming the leaf tips and young fruits of wolfberry, and the onset time is in the month of each year.

In severe cases, the front of the leaves is covered with a layer of white powder, and the plant appears white on the outside. Children who are prone to disease should be sprayed as soon as possible to prevent it. After the onset of the disease, 1000 1200 times of powdery rust was selected for spraying and control.

Be sure to spray the spray sufficiently evenly. Generally, spray again every 7 to 10 days.

Symptoms of Goji Berry Gall mites mainly harm the leaves, young branches, flower buds and young fruits of Goji barbarum, and the yellow-green round gall is formed in the affected part, which seriously distorts the leaves, hinders growth and photosynthesis, and leads to the decline of fruit yield and quality. Second, it occurs in multiple generations a year, overwintering in the gaps between the scales of wolfberry winter buds and the cortex of branches. In the spring, the leaves of wolfberry migrate to the old branches and new leaves to lay eggs.

After hatching, the nymphs invade the wolfberry leaves and form galls. Generally, gall mites begin to damage new shoots in mid to late May, and the first damage peak is in mid-June. In mid-August, the gall mites moved to autumn shoots again, and the second peak of the attack was in September, and the dormant period entered in November.

The gall mites gradually begin to overwinter in mid to late October, and the female adult mites overwinter in the scales of the winter buds of wolfberry, their depressions and the cracks in the branches. Goji scabies can occur for multiple generations in a year. The overwintering period is from mid to late October to mid to late April.

Overwintering mites begin to bite in mid to late April every year. As the temperature rises and the nutrient conditions are sufficient, the number of mites increases rapidly. In early June, foliar symptoms appeared.

In severe cases, it is grayish-brown or rusty yellow. If left unchecked, the leaves will dry up quickly, leading to early flowering and more leaf drop. The wolfberry tumor occurred in the field in early May and spread rapidly in late June.

The foliar nodules have increased dramatically, and some shoots have formed deformities and twists. By late June and early July, the average average level of general injuries per game was 2-3, and the level of serious injuries was 4. In the late stages of damage, leaves and fruits usually fall between late July and early August.

The activity cycle of the above two types of gall mites is basically similar. June is the initial period of reproductive harm, and June to August is the peak period of reproductive harm. These three months have the greatest impact on goji berries.

If it is well controlled in May, the damage will be greatly reduced in the later stage. In September, fecundity decreased, and the number decreased accordingly. By mid to late October, people overwinter.

The control method is to select robust and disease-free branch cuttings to raise seedlings; In winter, do a good job of clearing the garden, scrape off the overwintering adults of the bark nodes of the trunk and coat the trunk with pine membrane, and cut the branches of the first generation of larvae in spring; In the early stage of damage, foliar spray control can be carried out with Guoguang Bisec or Guoguang Sansai.

There are a lot of mite eggs on the leaves of wolfberry, these eggs will enter the inside of the leaf tissue, and will crawl out at a certain temperature, so that the leaves have some raised small dots or will appear in a lilac shape, and sometimes there will be deformities, which will seriously affect the growth of the plant, and cause the yield of the fruit to decline.

First of all, there will be a lot of spots on the surface, and the area will become larger and larger, and the appearance is also dry, which is a very common condition.

There will be some small insects on the leaves of the wolfberry, and the leaves of the wolfberry will also wither, and there will be brown spots, and if it is not controlled, the seedlings of the wolfberry will also die.

The dense yellow-green dots on the damaged leaves are nearly round and raised, and in severe cases, they are light purple and insect-like deformities, which seriously hinder the growth of the plant and cause the decline of fruit yield and quality.

There may be a variety of small spots, and there will also be a variety of viruses, and there will also be a lot of mites, and the leaves will turn yellow, and at the same time, there will be symptoms of wilting.

** It is because there is no pest management in winter, and pesticides are not sprayed in time, or it may be because the density of planted plants is too large, or too much watering will lead to the formation of these pests and diseases.

The reason for this is that pests and diseases are not cleaned up in winter, which leads to a large number of pests and diseases in spring, or it may be due to poor gout or excessive watering due to over-density of plant species, resulting in a large number of pests and diseases.

It may be because the soil is not nutritious enough, the water is too much, and there is not enough sunlight to cause this disease, so in the planting process must be timely defense against pests and diseases.

The quality of wolfberry seedlings is not good, and then the ** is also uneven, plus the environment selected is not good, it is a relatively high temperature environment, which will make wolfberry have this symptom.

Because they are infected with this pest and disease, they will hatch silkworm eggs in spring, which will affect the growth of wolfberry.

Gall mites are a common pest of wolfberry, harming the leaves, buds, young fruits, young stems, petals and peduncles of wolfberry. In severe cases, the whole tree becomes weak and the leaves fall off, leading to a decrease in yield. There were 15-25 kinds of galls on the severely damaged leaves, which seriously affected the yield and quality of wolfberry.

It is mainly distributed in Ningxia, Inner Mongolia, Gansu, Xinjiang, Shanxi, Shaanxi and Qinghai. Cuttings are used to raise seedlings with high-yielding and stress-resistant varieties, select robust, disease-free branches, soak them in 3000 4000 times of avermectin, and then carry out cuttings. Seedlings transported in other places are subject to strict quarantine to reduce the risk of long-distance transmission.

Strengthen fertilizer and water management, do a good job in topdressing during germination, flowering, and fruit expansion, and irrigate in time according to the principle of summer irrigation and winter irrigation, so as to enhance tree potential and improve plant stress resistance.

Combined with pruning and pruning, diseased leaves should be removed and destroyed in time to avoid migration to newly developed branches and leaves. In summer, use a shovel garden to remove overgrown branches and root tillers to prevent the growth and spread of gall mites. Goji barbarum scab, commonly known as insect bud disease, is one of the main diseases in wolfberry production.

The disease mainly harms the leaves of wolfberry, but also the shoots, flowers and fruits of wolfberry. Young mites burrow into the mesophyll of wolfberry to form galls, resulting in reduced fruit yield and poor quality. After the wolfberry is harvested, the diseased branches and leaves should be removed in time and taken away from the field for destruction.

Spring pruning should be done by late March to avoid migration of overwintering adult mites to new foliage. During the growth of wolfberry, the weedy branches and root tillers should be eradicated in time to prevent the growth and spread of gall mites.

Gall mites suck the sap of new branches and leaves, affecting growth. The white bumps on the leaves of goji berries can also affect the normal photosynthesis of the leaves, thereby reducing the fruit set rate. Even if some potted wolfberry fruits bear fruit, the fruit will dry up and cannot ripen smoothly after getting gall mites.

If the wolfberry bonsai is not treated in time, the sap in the leaves will be sucked away by a large number of gall mites, causing the leaves to dry up and even the whole plant to die. For wolfberry that is not seriously harmful to scabies and mites, spray one of the drugs every seven days, and use it two to three times in a row to remove it. For wolfberry with serious damage from scabies mites, in the case of ineffective spraying of one drug, alternate use of two or more drugs, use once every seven days, three to four times in a row, the effect will be much better.

Most of the wolfberry leaves appear yellow-green round bulges, which may be the damage of gall mites, catch the adult mites before and after wintering when a large number of gall adult mites appear in time, so as to reduce the density of pest mites.

The disease mainly damages the leaves of wolfberry, as well as the shoots, flowers and fruits of wolfberry. Young mites are used to burrow into the mesophyll of wolfberry leaves to form galls, resulting in reduced fruit yield and poor quality.

Clean the field After the wolfberry is harvested, it is necessary to remove the diseased branches and residual leaves in time and take them out of the field for destruction. Spring pruning should be completed before late March to prevent the migration of overwintering adult mites to the new foliage. During the growth period of wolfberry, it is necessary to eradicate the long branches and root tiller seedlings in time to prevent the breeding and spread of gall mites.

Symptoms: wolfberry gall mites damage wolfberry leaves, flower buds, young fruits, young stems, petals and flower stalks, flower buds can not flower and bear fruit after being damaged, the leaf surface is uneven, when the whole tree grows weakly, the fruit falls off and leaves, resulting in reduced yield, and the seriously damaged leaves have 15-25 galls, which seriously affects the yield and quality of wolfberry.

Control measures: seedling breeding. Field management: strengthen fertilizer and water management, do a good job of top dressing in germination, flowering and fruit expansion periods, in accordance with the principle of summer water irrigation, winter water irrigation, natural enemy control: the natural enemies of gall mites are seven-star ladybug, Chilean small plant mite, etc.

Chemical control.

Adult mites can suck leaves, young stems and fruits. After the leaf is damaged, purple-black nevus galls are formed, the outer edge of the front of the gall is purple ring, the center is yellow-green, the periphery is concave, the back is convex, and the gall is distributed along the leaf veins, and the base of the midrib and the middle of the lateral veins are the most densely distributed. The severely damaged leaves are twisted and deformed, and the top young leaves curl and swell into a fist-shaped, turn brown, and fall off early, resulting in bald branches and stop growing.

The young stems are damaged, and a 3 5 mm long mound gall is formed at the apical leaf bud. 1.Seedling breeding.

To use high-yield and stress-tolerant varieties for cuttings and seedlings, select branches that grow robust and free of diseases and insects, soak them in 3000 4000 times of epimectin, and then carry out cuttings. Seedlings transported from other places should be strictly quarantined to reduce the risk of long-distance transmission. 2.

Field management. Strengthen fertilizer and water management, do a good job in top dressing during germination, flowering and fruit expansion, and irrigate in time and maintain appropriate humidity in accordance with the principle of summer water irrigation and winter water irrigation, so as to enhance tree potential and improve plant stress resistance. Combined with pruning and pruning, the diseased leaves should be removed and destroyed in time, and the spring pruning should be completed before March 20 to avoid migration to new branches and leaves.

In summer, the long branches and root tillers were removed by shoveling the garden to prevent the breeding and spread of gall mites.

Symptoms: There are yellowish-green nearly round raised dots on the leaves, and in severe cases, they will turn into lilac. spraying of drugs before and after overwintering of adult mites; Dig up overcrowded plants and improve ventilation conditions; Strengthen plant quarantine work.

Reply to Green Mood post really thank you so much, it's written in detail. :handshake

After wolfberry grows leaves, it is necessary to pay more attention to observation, wolfberry gall mite is a common disease of wolfberry, early detection and early **.