Autumn cauliflower nodule management
Cauliflower is in the conversion period from the rosette stage to the ball stage. After the ball stage, the requirement for fertilizer and water is higher. The vegetable grower should manage scientifically to improve the quality and yield of cauliflower. In order to achieve high yield and high efficiency, autumn cauliflower focuses on the following four points:
First, water and fertilizer management
Cauliflower is a kind of fertilizer and fat-tolerant vegetable. The demand for fertilizer during the expansion of flower bulbs is relatively large, accounting for more than 70% of the whole growth period. When the leaves grow out of the flower balls, topdressing should be repeated and appropriate phosphorus and potassium fertilizers should be added. In combination with watering, topdressing nitrogen, phosphorus and potassium per acre (select low-nitrogen, high-phosphorus and high-potassium compound fertilizers) 20kg of ternary compound fertilizer, then pour a small amount of water every 5-7 days so as to avoid loose flowers caused by drought. ball. In addition, the use of top-dressing can greatly improve the quality of cauliflower, cauliflower is relatively sensitive to boron, copper and other trace elements, can be combined with disease prevention and pest control spraying potassium dihydrogen phosphate, green leaf treasure, borax and other efficient liquid fertilizer 2-3 times.
Second, beam light
The growth of autumn cauliflower under the strong light tends to make the flower bulb yellow, in order to ensure that the flower ball is white and delicate, and to improve the commercial nature, the flower ball should be shaded in production. When the diameter of the flower bulb reaches about 10 cm, the old leaves of the base are removed and the flower bulbs are covered to prevent the high temperature from causing the loose flower bulbs or the flower buds to be drawn. It is also possible to tie 4-5 large leaves close to the flower ball to cover the flower ball and prevent direct sunlight from affecting the quality and appearance.
Third, disease prevention and pest control
Autumn cauliflower diseases mainly include viral diseases, downy mildew, black rot, and soft rot. Virus disease can be controlled with 20% of virus A WP 500-600 times spray; downy mildew can be sprayed with 68.75% silver silver diluted 1000 times; soft rot and black rot can be used 72% of agricultural streptomycin sulfate 4000 times Liquid spray control.
Insect pests mainly include aphids, cabbage caterpillars, diamondback moth, beet armyworm and Spodoptera litura. The aphids can be sprayed with 2.5% imidacloprid 1000-1500 times liquid spray; cabbage caterpillar, diamondback moth, beet armyworm, Spodoptera litura and other available cypermethrin EC 1000 times spray control.
Fourth, timely harvest
It usually takes about 25 days from the appearance of flower bulbs to harvesting. The premature harvesting will affect the yield. If it is too late, it will cause loose flower balls, which will affect the quality and commodity. In the production, the method of phased harvesting should be used to sell in stages. Generally, it is harvested when the curd is fully grown, the surface is round and the edges are not scattered, harvested once every 2-3 days, and the curd retains when harvesting 2- 3 leaflets to protect the flower balls and improve their commerciality.
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