The latest control methods of soft rot of Chinese cabbage
Chinese cabbage soft rot disease, also known as rotten pimple, mostly began to occur in the pericardium stage, the initial outer leaves in the sun, mostly drooping, but sooner or later still recovered, with the development of the disease, these diseased leaves no longer recover, revealing leaf balls. The disease spot is flooded, and the tissue of the disease part becomes brown, rotten and slippery, with a bad smell.
Prevention and cure method
1. Implement crop rotation: where conditions permit, flood and drought wheels are appropriate. Do not apply diseased organic fertilizer. It is necessary to turn deeply into the sun and control the source of the bacteria.
2. The implementation of high border cultivation is beneficial to drainage and waterlogging prevention, and can reduce the occurrence of diseases.
3. Rational irrigation and fertilization: apply sufficient base fertilizer and topdressing in time to make the seedling grow vigorously and enhance the ability of disease resistance.
4. Timely removal of diseased plants: removal of diseased plants can reduce the source of bacteria and prevent the spread of bacteria. Especially before irrigation, it should be checked and dealt with in time. The burrow was sprinkled with lime for sterilization.
5. Pay attention to the prevention and control of pests: avoid causing wounds and prevent bacteria from invading.
6. Selecting disease-resistant varieties: the general Qingbang varieties and the first generation of hybrids have strong disease resistance.
7. Chemical control: the following pesticides can be selected: agricultural streptomycin can be irrigated 600 times with 100 kg water per packet or 70% dimethoprim, or 600 times with 20% Longke bacteria or 47% with 800 times Renong once a day for 2-3 times.
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Fertilizer concentration: in the fertilizer spraying process, the fertilizer concentration should be appropriate in order to get a good effect, the application concentration is too high, not only useless, but harmful. Generally speaking, the suitable spraying concentration of various trace fertilizers is: boric acid or borax solution 0.05%-0.25%; ammonium molybdate solution
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The common deficiency of nutrient elements in cucumber planting is potassium deficiency, magnesium deficiency and boron deficiency. The symptoms and control methods are as follows: slight yellow flower appears on the leaf edge of potassium deficiency, then the leaf edge dies, and the leaf curls outward with the leaf growth. Prevention and control method: timely supplement of potash fertilizer
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