The latest prevention and control methods of common viral diseases of blueberry

Blueberry is a fruit with high nutritional value and health care function. It has strong effect. However, it will suffer from many viral diseases during planting, which will seriously affect the yield and quality of blueberry. So how do we control these viral diseases? Let's take a look at the prevention and control methods of common viral diseases of blueberries together with Xiaobian.

1. Blueberry scorch virus

This virus can cause leaf and flower death, different varieties for its resistance slightly different, affected plants show symptoms mainly in early spring flowering, mainly for flower wilt Yan, and a small number of death, old leaf edge vision table. With the growth of plants, some varieties will appear continuous branch death, some poor resistance, often manifested as most of the leaves die, and plant death in 3-6 years, some resistant varieties only show leaf chlorosis symptoms.

Prevention and control methods: the best way to prevent is now virus-free seedlings colonization, colonization should pay attention to the vicinity of no such improper, once found plant damage, should immediately remove burned, while strictly controlling aphids.

2. Blueberry leaf spot disease

So far, the disease occurs in less areas, but once the disease is extremely harmful, the disease will take several years to pinch, the stem of the plant will die until the whole plant dies. Different varieties have different resistance and different symptoms. Some of the damaged 5-6 years show perennial stem death, new branches short and deformed, leaves have spots; some varieties show lighter, stem death is less, but the tree grows short, due to internode shortening, leaves small and yellow-green.

Control: The disease is mainly transmitted by bee and bumblebee pollination. It can be prevented by cutting off the transmission route, but the best way is to eliminate the diseased plant.

3. Mosaic disease

Mosaic disease is also a common disease in blueberry production, which can reduce production by more than 15%. The main symptoms are yellow green, yellow and spots or ring scorch, sometimes purple spots. The symptoms vary from year to year. The symptoms are severe in one year, but not in the next year.

Control methods: This disease mainly depends on aphids and virus-carrying seedlings spread, so the use of pesticides to control aphids and cultivate virus-free seedlings can effectively prevent the occurrence of this disease.

4. Red wheel spot disease

This disease is one of the most common diseases in blueberry producing areas in the United States. Once it occurs, it can cause at least a quarter of the yield loss. The disease occurs when the branches and leaves often show green ring-shaped red spots in the middle. In the hot season, this symptom will also appear in the upper half of the old leaves.

Control methods: The disease mainly depends on the spread of mealybugs, another way is to carry virus seedlings spread, the main way of control is to use virus-free seedlings and control mealybugs.

The above is a common blueberry viral disease control methods introduced, I hope to help you, want to know more about the relevant knowledge, please pay attention to us.