Cultivate strong seedlings and prevent the growth of vegetable seedlings by preventing the growth of vegetable seedlings under the adverse weather conditions. The soil can be watered with a concentration of 250-500 chlormequat, which can inhibit the growth of cucumber and tomato, and make the seedling grow stronger. It can also be sprayed with seedlings at a concentration of 1000-4000 or paclobutrazol at a concentration of 100-200. Prevent young seedlings from growing.
Prevent falling flowers and fruit, improve fruit setting rate. During the flowering period, vegetables will encounter high temperature and drought or continuous rain, resulting in a large number of falling flowers and fruits. It can be adjusted with 2,4~D and tomato spirit. The concentration of tomato is 10-20, and eggplant is 30~. 40, the pepper is 20 ~ 30, the prepared solution is placed in a wine glass or rice bowl, let the flowers dipped, or use a brush to smear the flower handle.
Promote the growth of stems and leaves, increase the yield of vegetables with 5406 cytokinin 400 ~ 600 times before the flowering, or 50 ~ 100 concentration of sodium bisulfite, can promote photosynthesis, help stems and leaves accelerate growth, promote flowering and expansion precocious. Using gibberellin to spray celery, spinach, and sage, 10 to 20 days before harvest, can increase the yield by 10% to 30%.
Inhibition of germination, prolonged dormancy Treatment of potato with 0.01% naphthylacetate can inhibit germination during storage. 15 to 20 days before harvesting of onions, garlic, etc., spraying with fresh leaf surface can make it difficult to germinate. On the contrary, if the potato seed potato is diced and immersed in the gibberellin concentration of 0.5~1 for 10 minutes, it can be broken and dried to release the seedlings on the moist sand bed to promote the germination.
Controlling the differentiation of melon and male flowers The treatment of seedlings with ethephon can change the sex of the melon and the length of the female flower. For example, spraying 2 to 4 true leaves of cucumber seedlings with 100-200 ethephon solution can increase the number of female flowers within 20 knots; spraying a true leaf-leafing cucumber seedling can continuously produce female flowers at the base and middle of the stem. No male flowers. Therefore, ethephon plays a particularly important role in cucumber production.
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