[opening of bolls;boll opening] 指棉桃熟裂,露出的白色棉絮 [earing up;heading of cereal plants] 抽穗。
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This large size may represent the initial size of the fiber before secondary-wall deposition or fiber desiccation upon boll opening.
这个大小可以代表第二层壳沉积或棉桃开裂干涸前棉纤维本来的大小。
Various pesticides have great impact on boll opening stage, and the boll opening stage are the latest after spraying mepiquat chloride and acetamiprid.
而不同种类农药的使用对棉花吐絮时间的影响较大，其中喷施克螨特、缩节胺和金世纪的棉花吐絮时间晚于其他药剂。
The aphid size at the cotton seedling, budding and boll setting stages was not significantly different in Nanjing, 1999. But in the boll opening stage the aphid size became smaller.
1999年江苏南京在棉花苗、蕾和铃期，棉蚜体型大小无显著差异，但到吐絮期后则显著变小。
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