棉铃虫在4个辣椒品种上的寄主适合度  

Difference of the fitness of Helicoverpa armigera(Hübner) fed with different pepper varieties

作　　者：贾月丽[1] 程晓东[1] 蔡永萍[1] 罗梅浩[1] 郭线茹[1] 原国辉[1] 

机构地区：[1]河南农业大学植物保护学院,郑州450002

出　　处：《生态学报》2012年第1期159-167,共9页Acta Ecologica Sinica

基　　金：河南省杰出青年科学基金项目(074100510013)

摘　　要：在室内条件下,比较了棉铃虫幼虫对辣味程度依次下降的豫优鲜辣2号、豫艺绿冠、豫艺墨秀大椒和豫甜椒12号4个辣椒品种果实的嗜食性、食物转化率和利用率及种群增长情况。结果表明:(1)棉铃虫幼虫的取食选择性、对食物的近似消化率和利用率在4个辣椒品种之间存在明显差异。其中初孵、3龄和5龄幼虫对4个辣椒品种果实的选择性规律基本一致,在豫甜椒12号品种上幼虫出现的百分率和取食量比率均最大;随着辣椒品种辣味程度的降低,5龄幼虫在其上的取食时间和休息时间依次增加,活动时间则依次降低;取食4个辣椒品种的果实后,6龄幼虫的相对生长率、相对取食量和食物转化率差异不显著,但取食豫甜椒12号的近似消化率和食物利用率与豫优鲜辣2号和豫艺绿冠之间差异达显著水平。(2)室内(27±1)℃、70%—80%RH和16 L∶8 D光周期条件下,棉铃虫在4个辣椒品种上均能完成其世代周期,随着辣椒品种辣味程度的增加,1龄幼虫和整个世代的发育历期依次延长,且在豫甜椒12号与豫优鲜辣2号之间差异达显著水平。其中在豫优鲜辣2号上棉铃虫的世代发育历期最长(27.86 d),其次为豫艺绿冠(27.23 d),再次为豫艺墨秀大椒(26.83 d),在豫甜椒12号上的发育历期最短(25.85 d);棉铃虫在4个辣椒品种上的世代存活率分别为豫优鲜辣2号为21.67%、豫艺绿冠为23.33%、豫艺墨秀大椒为23.33%、豫甜椒12号为35.00%;取食4个辣椒品种后,棉铃虫的蛹重差异不显著,其中雌蛹重分别为取食豫甜椒12号品种的为249.3 mg,取食豫艺墨秀大椒的为244.7 mg,取食豫艺绿冠的为243.4 mg,取食豫优鲜辣2号的雌蛹最轻,为209.4 mg。雄蛹重与雌蛹表现出的规律基本一致,但取食同一品种的雌蛹重均高于雄蛹重。(3)棉铃虫的种群净增殖率和内禀增长率在豫优鲜辣2号品种上最低,在豫甜椒12号品种上最高。以上结果表明,随着4个�As an important host plant of Helicoverpa armigera important effect on growth and development of H. armigera （ Htibner）, the pungent In this paper, effects of Yuyouxianla, Yuyiltiguan, Yuyimoxiudajiao, and No. 12 Yutianjiao the feeding behavior, food utilization, and population growth constituent of pepper has an four pepper varieties （No. 2 ） with the different contents of pungent constitueht on of H. armigera under lab conditions were studied comparatively. The results showed that： （1） The feeding preference, the approximate digestibility and the efficiency conversion of ingestion of 6th instar larvae showed significant differences in four pepper varieties. The larvae selectivity to fruit of four pepper varieties were similar in newly-hatched, 3rd instar and 5th larvae of H. armigera, that was these larvae preferred to No. 12 Yutianjiao variety with higher percentage of appearance and feeding amount, compared with other three varieties. With the content of pungent constituent declining in four varieties, the feeding time and recess time of 5th instar larvae were both increased, but corresponding activity time was reduced; There were no significant differences in the relative growth rate, relative consumption rate and the efficiency conversion of digestion of the 6th instar larvae reared on the four pepper varieties separately, but the approximate digestibility and the efficiency conversion of ingestion of 6th instar larvae fed in No. 12 Yutianjiao was significant difference with that fed in No. 2 Yuyouxianla and Yuyiltiguan. （2） In laboratory condition （（27~1） ~C, relative humidity of 70%--80%, and photoperiod of 16 L ：8 D）, H. armigera could normally complete a generation in all four pepper varieties, with the contents of pungent constituent increasing, the development duration of 1st instar larvae and life cycle of H. armigera were gradually prolonged, and showed significant difference in No. 12 Yutianjiao and No. 2 Yuyouxianla. The generation duration of H. armigera in No. 2 Yuyo

关 键 词：棉铃虫 辣椒品种 取食选择性 生命表 

分 类 号：S436.418[农业科学—农业昆虫与害虫防治]