The phenomenon of dead tree growing in greenhouses is mostly root rot, phytophthora root rot, stem rot, and blight, and the incidence of bacterial wilt is less. In fact, in order to reduce or avoid the above-mentioned diseases, vegetable farmers should start from the seedlings and do prevention work.
An effective way to treat dead peppers:
1. Choose aseptic seedlings is the key. If the main root or root tip is browned when planting, it is best not to use “small old seedlingsâ€, and it is best to choose strong seedlings with yellow roots and white roots, milky white roots, and dense roots.
2. Choose a good method of colonization. The appropriate method of planting should be selected according to the local soil properties. For example, sandy loam soil should be selected as the best plant; viscous soil should be selected with half-slope planting; planting depth should be the same with seedling Tuo Tuo and ground.
3. To avoid fertilizer rooting. Although vegetable farmers are familiar with common knowledge of vegetable cultivation, they often use large amounts of chicken manure in long-term solanaceous cultivation. If chicken manure is not sufficiently cooked, it will occur in the soil after planting water. Subsequent fermentation and the production of harmful gas burns the roots of pepper seedlings, leading to infections.
4. Drug treatment of the soil. It is recommended that the soil of greenhouses be mixed with the three agents of rosacea (methyl thiophanate-methyl) and thiram plus rububa before the colonization of the seedlings, each using 1.5 kg per mu. Specific operation: The above-mentioned medicaments are used twice, the first half of the medicaments are applied in the colonization ditch, and the second time when the seedlings are cultivated, the other half is evenly spread on both sides of the plants.
5. Reasonably water. Many years of production experience have proved that high soil moisture is the most fundamental factor in the occurrence of root diseases in pepper. Therefore, reasonable watering is also one of the key measures to control the infection of pathogens. Therefore, the author suggests that the first colonization of water must be thorough, which is conducive to the proliferation of seedlings. New roots to shorten the period of seedling sowing. After the seedlings are slowly watered, the soil in the shed is subject to dry seeing moisture. The phenomenon of water accumulation in the fields is strictly forbidden; when there are sporadic diseased plants in early spring, care must be taken not to flood the land, otherwise there will be destruction. The possibility of a shed; Rainwater must not be poured into the shed during the rainy season.
6. Control of greenhouse temperature can also effectively prevent root diseases. The winter greenhouse cultivation of greenhouse peppers should try to improve the temperature of the greenhouse, and the shade net must be covered during the summer cultivation to reduce the light intensity and reduce the evaporation of the temperature and moisture in the greenhouse.
7. Reasonably choose drug prevention and treatment. It is recommended that vegetable farmers take preventives from seedlings at the seedling-reducing stage, and they can choose to expose 800 times of Jingguojing 1000 times of mixed spray; or choose 800 times spray of rurububa. In addition, most vegetable farmers only spray the liquid evenly in the leaf area of ​​the pepper, often neglecting the stem, and the above-mentioned diseases occur precisely at the base of the stem of the pepper. At the base of the plant stem.