What are the diseases that blueberry leaves are most likely to develop when growing blueberries?

Blueberries, the fruit we often buy, in addition to the taste, also have health care functions, and really have a lot of effects. There are many diseases that are susceptible to throughout the planting process, which affect the growth of blueberries, how does it work? If you want to grow blueberries, you should get to know it well.

Learning to deal with diseases is an important step throughout the planting process. John kennedy. 1. Spot disease.

The first is spotted disease. According to the survey, the probability of the occurrence of this disease is not very large, but once infected, the disease can be very serious. And, in many cases, there is no way**.

Eventually, many blueberries have wilted and died, and the damage is severe. When spotted disease occurs, we can find that the leaves of fruit trees have large and small spots, showing a reddish-brown state, their growth is relatively fragile, and the fruit trees are small, and the leaves are slowly shrinking.

Because the disease is contagious, eliminating it first is the most important step. In summary, many farmers may spread this disease in the process of bee pollination, and it can be alleviated a lot by finding diseased branches and leaves, removing them in time, and eliminating the source of the disease. If you have mild symptoms, you can be cured by applying medicine quickly.

2. Mosaic disease. There is a relatively common disease called mosaic disease, which has a relatively high probability of occurrence, and having this mosaic disease can greatly reduce the yield. When it happens, we also judge by the leaves.

In addition to having spots on it, it will slowly turn yellow and wilt. By the later stages of the disease, the leaves will have a purple shape, and if you have had this disease before, you may recur this year. This disease is mainly transmitted by viruses, so it is necessary to spray fruit trees frequently to remove viruses and prevent pests.

Especially for some small fruit trees, it is susceptible to this mosaic disease. After similar symptoms are found, the leaves slowly wither, which is a manifestation of mosaic disease. 3. Dry coke virus.

There is also a disease, which is caused by blight. When blueberries first bloom, we will find that the plants are not luxuriant, these flowers are slowly wilting, and some flowers are wilting. The slower the fruit tree grows, the worse the branches and leaves grow, and some of the leaves have already appeared to be in a dead state, and the fruit tree will not survive in a few years.

If it is caused by this virus, it can be found that the color is lighter and the leaves turn green in the location of the leaves. Growers should take precautions to avoid the invasion of the virus. If a similar phenomenon is found, it is necessary to remove the diseased branches and leaves, prevent pests, and spray pesticides in time.

Diseased branches and leaves should not be thrown away casually after being cut off, as they are easy to spread, so it is best to destroy them.

Spot disease, once infected fruit trees have large and small spots on the leaves, showing a reddish-brown state, their growth is relatively fragile, fruit trees are small, and the leaves slowly shrink; Mosaic disease, also known as mosaic disease, has a relatively high probability of occurrence, and having this mosaic disease can greatly reduce yield; Dry coke virus, which is caused by wilt, when blueberries first bloom, we will find that the plants do not grow well, and some leaves appear to die.

The main pests and diseases of blueberries include larvae and grubs of "stem borer beetle" and "beetle", as well as common pests and diseases such as "leaf chlorosis", "leaf blight", "stiff fruit disease" and "leaf-eating stinging moth". Pest control is an important part of blueberry cultivation and management.

There are two points that must be paid attention to when raising blueberries, otherwise this kind of leaf is most likely to appear.

It is a red spot disease of the blueberry. Thoroughly removing diseased leaves and fruits, and burning or burying them deeply is an effective method of disease prevention.

In the early stages of infection, the leaves produce orange-yellow, slightly raised, near-circular spots with well-defined edges. The lesions gradually expanded, the color gradually deepened, and the mesophyll of the diseased part also thickened, producing many small dark red grains on it, that is, the conidia of the pathogen.

By the end of autumn, the diseased leaves turn reddish-black, with a concave front and a convex back, curling the leaves and appearing small black spots, i.e., the ascomycetes where the fungus is buried in the subsidium. When the disease is severe, the leaves are densely covered with lesions, and the leaf color turns yellow, resulting in early defoliation.

The fruit produces orange-red round lesions, slightly raised, with unclear edges, and finally reddish-black, with many small dark red spots scattered on them. The fruit is often deformed, and the celery is inedible and easy to fall off.

Hello dear. Blueberry pests and diseases in November are as follows: 1. Types of pests and diseases Blueberry pests and diseases mainly include maggots, shoelace virus diseases, aphid mites, leaf spot diseases, and stem canker diseases. 2. The principle of prevention and control a. It can be combined with prevention and control, prevention first, and prevention and control complement each other, so as to better achieve agricultural ecology.

b. Choose advanced fertilization and poisoning technology to reduce the amount of fertilization pesticides for blueberries, and it is best to choose those chemical pesticides with good insecticidal effect and low pesticide properties, and carry out reasonable treatment, or you can choose standard chemical pesticides for prevention and control. 3. Prevention and control methods a. From late April to mid-May, select 50% carbendazim 400 to 600 times and 80% dichlorvos emulsifiable concentrate 12 to 1,500 times liquid mixed and stirred, and carry out two fertilizations, and the interval between two fertilization is best half a month. b. From late August to October, you can mix and stir with 50% carbendazim 400 to 600 times and 80% dichlorvos EC 12 to 1,005 times or deltamethrin EC 1,000 to 1,200 times for one or two fertilizations.

c. In late November, the blueberry tree should be pruned and pruned, and the nearby oak weeds should be cut off, so as to eliminate the winter pests and diseases, and cut off the branches and leaves of the blueberry tree. d. In December, the soil should be deeply turned, about 20 centimeters of celery, which is also conducive to eliminating pests in the soil. 1.

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