采用关中棉区蒲城县棉花“三桃”调查资料 ,对“三桃”不同时期的蕾铃脱落状况与各分时段的气象因素进行了相关分析 ,建立了回归方程 ,得到造成棉花“三桃”蕾铃脱落的主导气象因子。伏前桃蕾铃脱落的气象因子为 :6月下旬日降水量≥ 0 1mm的降雨天数及旬平均气温 ;伏桃蕾铃脱落的气象因子是 :伏桃时期日极端最高气温≥ 3 8℃日数及日降水量≥ 2 0 0mm天数 ;秋桃蕾铃脱落的气象因子是 :伏桃时期日极端最低气温≤ 1 8℃的天数及日降雨量≥ 2 0 0mm天数。并提出了对策措施 Based on the survey data of “Peach Peach” in Pucheng County, Guanzhong cotton area, the correlation analysis was made between the situation of peach buds and the meteorological factors in different time periods. The regression equation was established, Leading to fall off the leading meteorological factors. The meteorological factors of fall of peach boll before V are as follows: the number of rainy days with daily precipitation ≥ 0 1mm in late June and the average temperature of ten days; the meteorological factors of fall off of peach boll are as follows: day extreme maximum temperature ≥ 380 ℃ days And the daily precipitation ≥ 200 mm days. The meteorological factors of fall peach boll fall: the number of days with extreme minimum temperature ≤ 18 ℃ and the daily rainfall ≥ 200 mm days. And proposed countermeasures