First, water and fertilizer management
Cauliflower grows faster after entering the bulbous expansion period, and the demand for water and fertilizer is relatively large. Fertilizer should be applied 2 to 3 times depending on the amount of base fertilizer and field conditions. M. N and K fertilizer or 20 kg of high-potassium compound fertilizer should be applied along with water. Usually 7 to 10 days, 1 water, once the water once the fertilizer, the amount of water should be sufficient, poured thoroughly.
Second, cover the leaf ball
When the flower bulb diameter reaches 5 cm (the size of an egg), one or two outer leaves close to the flower bulb are broken to cover the flower bulb to avoid direct sunlight and keep the flower bulb white. When the cover leaves are wilted and yellow, new leaves should be replaced promptly.
Third, disease prevention and pest control
The major pests and diseases in the production of spring cauliflower include downy mildew, soft rot, diamondback moth and cabbage caterpillar. Downy mildew mainly damages the leaves, resulting in irregular or polygonal lesions, and uses 72% DuPont Ke Lu wettable powder 600 to 800 times liquid spray. Soft rot spreads from the base of the leaf to the stem and roots, causing plant rot to stink. Use agricultural streptomycin or neomycin two million times liquid to root or spray. Cabbage caterpillar used 50% phoxim EC 2000 times spray. Plutella xylostella was larvae-damaged leaves, and avermectin EC was used to spray 1000-3000 times or 5% Sitabo 1000-2000 times.
Fourth, timely harvest
The cauliflower is fully grown and its surface is round and its margin is not yet loose. General early-maturing varieties of flower balls up to 10 to 15 cm in diameter, late-maturing varieties of flower balls up to 25 to 30 cm in diameter. When harvesting, generally leave 2 to 3 leaflets to protect the curd.
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