The recent background message series found a common problem, and many farmers are also helpless to them! When you take a closer look, you know that those vegetables are dead, and it turns out that the disease is caused by bacterial wilt! Xiao Bian feels that it is necessary to tell everyone about the general situation of bacterial wilt. Although this disease is not easy to prevent, it is because you have not done it in many aspects!
Basic information on bacterial wilt
Harmful vegetables: tomato, pepper, eggplant
Pathogens causing the disease: bacterial diseases caused by Pseudomonas aeruginosa
The appearance of the disease:
Wilting : First, the top leaves are wilting, the lower leaves are wilting, and the middle leaves are wilting; there is also one side of the leaves wilting first (so-called "half-side madness" phenomenon; daytime wilting, recovery in the evening. When the plants are withered, they remain green, so they are named after "green blight".
No disease : the leaves, stems, branches or other parts of the diseased plants do not show symptoms (such as mold, powder, hair, etc.). The hand squeezes the discolored vascular bundle and can see the white bacterial liquid overflow.
Stem vascular bundle : The stalk is peeled off, and the vascular bundle becomes brown. Bacterial pus: Cross the diseased stem of the plant, squeeze it with a bottle of salt water, and look at the light. It can be seen that the milky white liquid is ejected from the cut, which is the famous "spraying phenomenon".
The speed of wilting : The incidence of bruising is rapid. It will die in 2-3 days in the case of high temperature and dry soil. In the case of low temperature and relatively wet soil, it will die in about 7 days.
The ins and outs of bacterial wilt
Source: It belongs to soil-borne diseases. The primary infestation source is mainly the bacteria that overwinter in the soil (if the fertilizer, the diseased plant residue can carry the bacteria).
Whereabouts: Acidic soils are more prone to disease, continuous cropping, flood irrigation, unreasonable fertilization, extensive management, and poor cultivation patterns can all exacerbate the disease.
Huinong.com Xiaobian reminds: The germs are mainly spread by rainwater or irrigation water, which is easy to invade from plant wounds! In order to avoid bacterial wilt, the key is to keep the soil healthy!
Management measures for bacterial wilt
Preventive work
1, change the planting (feeling is not practical, but still have to mention)
The frequently-occurring or already-occurring plots are replaced with non-same crops for 2-3 years, and it is better to have the idea of ​​water and drought.
2, basic measures
It is necessary to thoroughly remove and burn off the diseased plant residues in the field. It is not possible to use the diseased plant residues to fertilize and not apply unfertilized organic fertilizer. The farming operation should try to avoid increasing the wounds of the plants and avoid flooding of the water. The accumulated water should be drained in time. Avoid contact with germs in many ways.
3. Soil disinfection
Regardless of whether there have been any plots of bacterial wilt, the soil must be disinfected before planting, the appropriate amount of lime powder is sprinkled, and the soil is turned over.
4, the use of grafted seedlings
It is recommended to use grafted seedlings resistant to bacterial wilt to reduce the occurrence of diseases.
5, seed disinfection
Soak seeds in warm water (about 53-55 ° C). Specific practice: soak for 3-5 times of warm water with seed weight for 15 minutes, stir while stirring, wait until the water temperature drops to about 36 °C, stop stirring, and then soak for 4-5 hours to germination.
6, early prevention is the key
Before planting: you can choose to use the fine metalaxyl, chlorfenapyr, azoxystrobin to add phytobiotics, or chlorophyll to carry out the roots;
Seedling stage: You can choose Zhongshengmycin, Chunleimycin, Qingkulik + biological fertilizer (such as Diwangwang) + foliar fertilizer (such as Wofengsu), and irrigate roots 1-2 times, every 7 days or so. Spraying can also be carried out once, but the focus is applied to the base of the stem;
Flowering stage: You can choose to use Zhongshengmycin, Chunleimycin, Qingkulik + Biological Fertilizer (such as Diwangwang) + Foliar Fertilizer (such as Wofengsu), spray 2-6 times, every 7 days or so Once, the focus is applied to the base of the stem, which can also be rooted.
Prevention work
1, early prevention
Inspect the vegetable garden in time, when it is found that local wilting occurs slightly, and it is determined to be a bacterial wilt, you can use copper hydroxide, Chunleiwang copper compound, thiazole zinc and thiabium copper compound, Qingkulik, etc. Apply the stem base or rooting treatment for 2-3 times, then pour the fertilizer to the roots (such as fertilizers containing amino acids and humic acids).
2, early release early rest assured
For the incurable plants, or more plots, remove them in time, take them away from the field for burning or deep burial, and use lime powder or copper preparations to disinfect the original disease points, while focusing on controlling the plants around the diseased points. ! Reduce the number of pathogens and reduce the incidence of diseases.
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