Hello, teacher. What's wrong with this persimmon? How to prevent it?

This is tomato bacterial wilt

Website home page

About us

Company/enterprise culture

Leadership speech

marketing network

marketing model

news center

Product display

personnel recruitment

contact us

Control techniques of tomato bacterial wilt

News source: Vast Hi-Tech? Number of hits: 856

Tomato bacterial wilt is one of the common vascular system diseases in tomato, which occurs in both protected and open fields. South China and rainy years are common and serious. When the disease is serious, the plant will wither and die, resulting in serious yield reduction or even no harvest.

Symptoms of tomato bacterial wilt

The symptoms of the damaged plants at seedling stage are not obvious, and after flowering, the diseased plants begin to show symptoms. The leaves are pale and withered. Leaf wilting starts from the upper leaf, then the lower leaf and finally the middle leaf. At the beginning of the disease, the leaves wilted at noon, returned to normal in the evening and morning, repeated many times, wilting intensified, and finally died, but the plants were still blue. The middle and lower cortex of diseased stems is rough, and adventitious roots and buds often grow. The vascular bundle of the diseased plant stems turns brown, but the roots of the diseased plant are normal. After crosscutting the diseased stem, soak it in clear water or squeeze the incision by hand, and milky white mucus overflows (pathogen pus). ?

Preventive and control measures:

First, crop rotation, using cruciferous or Gramineae crops for more than 4 years. In general, avoid continuous cropping with eggplant, pepper, soybean, potato and other crops.

Secondly, choose tomato varieties with disease resistance, such as Kangqing 19, Qiuxing and Suifeng.

Preventive and control measures:

First, crop rotation, using cruciferous or Gramineae crops for more than 4 years. In general, avoid continuous cropping with eggplant, pepper, soybean, potato and other crops.

Secondly, choose tomato varieties with disease resistance, such as Kangqing 19, Hunan Tomato 1, Hunan Tomato No.2, Qiuxing, Suifeng Tomato and so on.

The third is to strengthen cultivation management. Choose disease-free land for seedling raising and transplanting with soil to reduce root damage. High border planting to avoid flooding. Using formula fertilization technology, fully decomposed organic fertilizer or plant ash was applied at the bottom to change the microbial community. Apply lime100-150kg per mu to adjust the soil pH value. Proper application of potassium fertilizer and boron fertilizer can improve plant disease resistance. It is forbidden to use thin fertilizer during high temperature, and water should be controlled properly. Found that the diseased plants were immediately pulled out and burned, and sprayed with quicklime for disinfection. After harvesting, plant residues are destroyed centrally. Raising seedlings in old seedbeds requires soil replacement or chemical disinfection. Spraying the seedbed with 500 times of formalin solution 18-22k g/m2, covering it with plastic film 1 week, uncovering the film, ploughing, and sowing after the residual medicine is distributed. ?

At present, the commonly used drugs are all better. One is the 38% oxystrobin we use now. Generally, the ratio is 600 ~ 1000 times, and then it is mixed with neophytomycin or agricultural streptomycin.

FYI

Our farmers often use drugs such as Kangkuning.

Just seeing the guests off