The price of celery in August has been on the high side. The main reason is that because of the high temperature and rain, celery is prone to disease. Therefore, the most important thing in the management of celery in August is the prevention and treatment of pests and harvesting.
Due to the influence of high temperature and other factors, the occurrence of celery leaf spot disease is serious. No matter whether it is a new planting field or a year-round planting area, almost all of them occur, especially the heavy planting field, the incidence rate can reach 100%! The morbidity of the diseased plants is small, aging, and the appetite is greatly reduced. Or the leaves turn yellow and the goods are reduced. Even the seedlings were even killed and rejected. The prevention and control method is to use less nitrogen fertilizer in the early stage to shelter rain, shade and cool, use foliar fertilizer, and increase resistance; the agent can use 50% early thiophanate-methyl WP 500 times, or 1:1.5:200-fold Bordeaux, 64 % Antivirus WP 500 times or 40% polysulfide suspension 500 times or 47% Garnett WP 600 times, or BASF's Opel.
For top dressing, the principle of a few times should be mastered, and each application should not be excessive. Nitrogen fertilizer and decomposed light pig manure water should be selected. Other organic fertilizers should not be applied. After the plants grow up, topdressing can be combined with irrigation. Topdressing mainly urea, each 10-20 kg per acre, in addition to appropriate amount of phosphorus and potassium fertilizer. Boron deficiency can easily lead to cracking of the petiole, and 0.5 to 0.75 kg of borax can be applied after planting. In order to increase the yield of celery and improve the quality, it can be sprayed with 10-20 ppm of Nine Oxygen for 15-20 days before harvest, which can promote the growth of celery, and the effect is remarkable. Can also be sprayed 2-3 times in the whole growth period "cloud big -120" (brassica lactone), the effect of increasing production is also very good.
Generally due to the hot summer celery growing season, it is not conducive to the growth of celery, so the harvest of summer celery is earlier than that of autumn and winter celery, which is generally listed as a semi-plant. (Special technical guidance for Chengdu Kunshan Urban Mu Vegetable Base)
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