烟草粉斑螟Ephestia elutella(Hübner)生活史与种群动态研究

Seasonal history and population dynamics of tobacco moth Ephestia elutella(Hübner)

为研究烟草粉斑螟Ephestia elutella(Hübner)在陕西关中的发生规律,于1998-2001年采用室内饲养与性诱捕器监测相结合的方法,持续调查了烟草粉斑螟年生活史和种群数量动态。结果表明:1)烟草粉斑螟在关中地区1年可发生2-3代,主要以老熟幼虫在烟仓中越冬;2)成虫3月下旬开始羽化,全年有3个发生高峰期,越冬代、第1代和第2代成虫的羽化高峰期分别出现在5月中旬、8月上旬和9月上旬;3)老熟幼虫有3个明显的迁移活动期,分别出现在4月上中旬、7月上旬和10月中下旬;4)越冬代成虫的发生期受贮藏环境温度的影响,幼虫的活动规律则不仅与发育期有关,还受人为活动的影响。据此提出了相应的防治措施。

Seasonal history and population dynamics of Ephestia elutella were investigated with indoor rearing and sex pheromone trap monitoring in in central Shaanxi from 1998 to 2001.Results showed that E.elutella completed 2 or 3 generations per year,overwintering as grown larvae in tobacco warehouses.Overwintered adults emerged at the end of March,and the adults in the overwintered,1st and 2nd generations reached flight peak in mid-May,early August and early September,respectively.E.elutella also had three pupating peaks in mid-late April,early July and mid-late October.In addition,the emergence date of overwintered-generation adult depended on environmental temperature,while larval behavior was related to developmental stage and management activities in warehouse,Control method was suggested according to seasonal life history and pest habits.