Goji gall mite disease is a common disease of wolfberry, what are the characteristics of wolfberry g

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.

Goji gall mite disease is a plant disease that occurs on wolfberry trees.

Morphological characteristics are long conical mite, body length 121-329um, orange-yellow, proximal cephalothorax with 2 pairs of feet, so it is called quadruped mites, there is 1 feather-like claw at the end of the foot, the body has 52-54 ring grooves, and there is 1 pair of extra-long tail hairs. Juvenile mites conical, slightly curved downward, 74-110um in length, light white, translucent. If the mite is shaped like an adult mite, but the body length is shorter than that of the adult mite and longer than that of the young mite, light white to light yellow, translucent, the egg is nearly spherical, 39-42um, light white, transparent.

The infestation cycle in the north, where adult mites overwinter in hidden places such as the cracks of wolfberry bark and bud scales. In the first half of April of the following spring, when the wolfberry buds bloom green, the overwintering adult mites begin to sting activities, from late May to early June, when the wolfberry leaves are spread, a large number of stinging adult mites are transferred to the new leaves of wolfberry to lay eggs, and the hatched young mites drill into the leaf tissue to form galls, from early August to mid-September, the damage reaches its peak, the temperature is about 20, and the adult mites outside the gall crawl actively. At the beginning of November, the temperature drops below 5, and the adult mites enter the overwintering state.

Aphids and psyllids can carry a certain amount of adult mites, which are the vectors of the disease, and this mite occurs for many generations a year.

Symptoms of Damage: Dense yellow-green nearly round raised dots on the affected leaves, light purple when severe, and insect-like deformity, which seriously hinders the growth of the plant and causes the decline of fruit yield and quality.

Prevention and control methods: Catch the adult mites before and after wintering, and spray pesticides in time when a large number of adult mites appear in time to reduce the density of harmful mites. The agent has 600 times of 50% acaricidal suspension, 150 times of 30% solid stone sulfur mixture, or 300 times of 50% sulfur suspension, and 3000-4000 times of epirmectin. According to the experience of Ningxia, to grasp the exposure period of local gall adult mites or the active period of emerging adult mites, ultra-low volume spray was used to spray 50% dipropylene oil aerosol and diesel 1:

The mixture of 1 is 200g per mu, which has low cost and good effect.

The symptoms of the leaves are the most obvious, the damaged parts are densely covered yellow-green nearly round raised dots, the leaves are twisted, the growth of the plant is seriously hindered, the leaves and young stems are inedible, the fruit is deformed, and the yield and quality are reduced.

The symptoms are, the leaves are yellow and wilted, and the appearance of dense ephedra green stem round raised dots, which are called lilac in severe cases, so that the plant no longer grows, resulting in a decline in fruit yield and quality.

The symptom is that there will be a lot of white spots, and these white spots are very sticky, which will also slow down the growth rate of wolfberry, and will affect other wolfberry, which is very contagious, and the leaves will also appear yellow brown spots.

The general symptom is that the leaves look particularly obvious, and there will be some round bumps next to them, and the color of the small dots is yellow-green. Sometimes there may be some orange-yellow color. It will also turn purple in the later stage.

And there may be some decay, and there may not even be any results.

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.