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近几年,随着抗虫棉杂66(JSH66)和新棉33B在我省的大面积推广,由于其抗虫性好,棉花蕾铃受棉铃虫为害相对减少,苗铃脱落率相对降低,但调查表明,多种因素造成的棉花脱落率一般仍在50％～60％左右,由此说明控制脱落,增加结铃的潜力还是很大的,摸清蕾铃脱落规律,找到脱落原因,采取有效的控制措施,将会进一步提高棉花结铃性,提高棉花产量。1 黄铃脱落规律 苗铃脱落的一般规律为:落铃多于落蕾;小蕾脱落多,大蕾脱落少;开花初期脱落较少,开
In recent years, with insect-resistant cotton hybrid 66 (JSH66) and new cotton 33B in our province to promote a large area, due to its insect resistance, cotton bud bollworm damage is relatively reduced, the relatively low rate of seedling bell shedding, However, the survey shows that the cotton shedding rate caused by various factors is still generally about 50% ~ 60%, indicating that the control shedding and increasing the potential for bolting is still very large, find out the law of shedding buds to find out the causes, take Effective control measures will further increase cotton boll and increase cotton production. 1 yellow bell off rules The general rule of seedling bell shedding is: falling bell more than falling buds; small buds shedding more, less buds shedding;