气象要素对棉铃虫发生规律的影响

通过分析15年来尤其是1992年以来临汾地区气象资料和棉铃虫系统调查数据，探讨了该区温度、降水、湿度等气象要素对棉铃虫发生消长的影响。结果认为，4－6月份温度是影响越冬代和1代发生期、2代卵盛期的主要因子，此期温度高的年份，棉铃虫发生早；降水量和雨日数主要作用于2，3，4代发生量，在各代发生期内，雨量大、雨日多、分布匀、空气湿度高，棉铃虫大发生。这为县、乡、村发布棉铃虫短期预报，制定防治方案提供了理论依据。

The Effect of Climite on Helicoverpa armigera Occurence

According to the climate information in recent 15 yare especiall in 1992 and systematic investigntion data of Linfen county, this paper studies the effect of the county's temperature, precipitation, humidity and other key climate elements on helicoverpa-armigera grow-and-decline. The temperature ofApril to June is the main effective element on overwinter generation, the first generation occurrence andthe second generation laving pened. In those you of which this period has high temperature, helicoverpa-armigera occurs earlier. The precipitation and the number of raining days in July and August mainly affect the occurrence quantity of the second, the third and the fourth generations. During the occurrence ofeach generation, storm has a certain scour function. Long-time accumulated water on the ground in pupaperiod affects the occurrence quantity of the next generation. The results provides theoretical basis for basic units to release short-term-forecast of helicoverpaarmingera and to work out control methods.