山东省鱼台县二代棉铃虫发生的气象条件分析

Analysis on Meteorological Conditions for Happen of the Second Generation Bollworm in Shandong Province

通过对二代棉铃虫的连续调查观测,发现山东省鱼台县二代棉铃虫初见卵期在6月15日前后,卵高峰期在6月下旬,结束期为7月上旬,总卵期25 d左右。在这段时间应采取有效措施,防止二代棉铃虫发生。同时还发现二代棉铃虫与气象条件关系密切,除与温度、湿度有关外,还与降水有关。6月上旬降水少,6月中旬至7月上旬降水多且持续时间长,是造成二代棉铃虫大发生的一个重要原因。

The continuous observation investigation of the second generation bollworm was conducted. The results showed that the first egg stage of the second generation bollworm was after June 15^th; the egg peak was in late June;the end of the period was in early July;and the total egg stage was around 25 d.In this period of time, effective measures for preventing the 2^nd generation bollworm should be taken. At the same time,it was also found that the second generation bollworm was closely related to meteorological conditions, and in addition to the related to temperature and humidity, also related to the precipitation. Less rainfall in early June, much precipitation and long time in the middle of June to early July were the important reasons for happen of second generation bollworm.