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近些年来,大白菜“干烧心”在我国各地大白菜产区均有加重危害的趋势。其防治方法除施用腐熟的有机肥、实行药剂拌种外,可在白菜莲座期和结球初期叶面喷施25％叶枯灵1000倍液或30％DT500倍液,还可在结珠初期向每株白菜心部投放2—3克钙颗粒剂。注意少施氮肥,每亩施纯氮应不少于20公斤,避免蹲苗过度或灌水过多,对严重漏水田和重病地块,应改种其它作物。
In recent years, Chinese cabbage “dry heart” cabbage production in all parts of our country are aggravating the trend. In addition to the application of decomposed organic fertilizer fertilizer, the implementation of pharmaceutical seed dressing, the cabbage rosette stage and the early knot of foliar spraying 25% Ye Kuiling 1000 times or 30% DT500 times liquid, but also in the initial stage of beads Put 2-3 grams of calcium granules into each heart of cabbage. Pay attention to less nitrogen fertilizer, nitrogen per acre should not be less than 20 kg, to avoid excessive squatting or excessive irrigation, the serious leakage pad and seriously ill land should be re-planting of other crops.