宝鸡地区春甘蓝小菜蛾种群动态研究

为提高小菜蛾防治效果,采用性诱剂对宝鸡地区陈仓区、凤翔县、太白县3个监测点的春甘蓝小菜蛾幼虫和成虫的种群动态进行了调查分析,结果表明:因海拔高度不同引起的温度差异导致了小菜蛾幼虫和成虫在3个监测点的始现期、高峰期、最高峰的种群数量、发展趋势均有所不同。其中,陈仓区、凤翔县和太白县小菜蛾幼虫的始现期分别为5月24日、5月24日和5月31日;小菜蛾幼虫在陈仓区的发生量有4个高峰期,分别为5月31日、6月14日、7月5日、7月19日,在凤翔县的发生量有3个高峰期分别为5月31日、6月28日、7月19日,在太白县的发生量有3个高峰期分别为6月7日、6月21日、7月12日。陈仓区和凤翔县小菜蛾成虫的始现期为5月31日,太白县小菜蛾成虫的始现期为6月7日;小菜蛾成虫在陈仓区的发生量有3个高峰期分别为6月14日、6月28日、7月19日,在凤翔县的发生量有2个高峰期分别为6月28日、7月19日,在太白县的发生量有2个高峰期分别为6月21日、7月12日。

Population Dynamics of Plutella xylostella in Spring Cabbage in Baoji

Abstract: In order to improve the control effect of Plutella xylostella, the population dynamics of Plutella xylostella larvae and adults in three monitoring sites including Chencang district, Fengxiang county and Taibai county were investigated and analyzed by using sex attractants. The results showed that number and trend of the population at the beginning, the peak and the peak of the monitoring point were different. The occurrence of Plutella xylostella larvae in Chencang district, Taibai county and Fengxiang county were May 24th, May 24th and May 31st, respectively. The occurrence of Plutella xylostella larvae in Chencang district had four peaks, which were May 31st, June 14th, July 5th and July 19th, respectively. The occurrence of Plutella xylostella larvae in Fengxiang county had three peaks, which were May 31st, June 28th and July 19th, respectively. There were 3 peak periods in Taibai county, namely, June 7th, June 21st and July 12th. The adult population of Plutella xylostella in Chencang district and Fengxiang county began on May 31st, the adult population of Plutella xylostella in Taibai county began on June 7th, and the adult population of Plutella xylostella in Chencang district had three peaks on June 14th, June 28th and July 19th, respectively. The occurrence of Plutella xylostella in Fengxiang county had two peaks on June 28th and July 19th, respectively.There were 2 peaks in Taibai county, which arised on June 21st and July 12th, respectively.