【摘要】 通过 1998年气象及虫情资料的分析 ,证实气象因子对棉虫年度发生程度起着关键性作用 ,尤其是春季气候条件 ,对棉虫发生期的早晚及发生量的多少有着直接影响。更多还原

【Abstract】 According to the data of meteorology and cotton-pest in 1998,it is verified that meteorological factors have critical effect on the annual occurrence level of cotton-pest Especially, climate condition in spring has direct effect on the period and the number of cotton-pest’s occurrence更多还原