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乙烯利有脱叶、催熟作用,喷后3～4天叶片褪色变红,5天左右干枯脱落,10天后吐絮明显增加,20天左右为吐絮集中期。据调查,喷乙烯利可提早拔杆7～10天,青铃降低20%左右。棉花迟发旺长,后期贪青晚熟,可喷施乙烯利。使用方法如下:1.在秋雨多、烂铃重的情况下,可采用分层喷药的技术,即:第一次在9月上旬,用40%乙烯利300ppm 喷施棉株下部;第二次在9
Ethephon has decalcification and ripening effect. The leaf faded reddish after 3 ~ 4 days of spraying, and dried off in about 5 days. The boll density increased obviously after 10 days and was concentrated in 20 days. According to the survey, splenectomy Lee early pull bar 7 to 10 days, reducing the green bell about 20%. Late blooming cotton length, the late greed late, can be sprayed ethephon. The method of application is as follows: 1. In the case of autumn rain and rotten boll weight, stratified spraying technique may be used, that is, spraying the lower part of the cotton plant with 40% ethephon 300 ppm for the first time in early September; Times at 9