摘要
赤眼蜂是农林业生产中应用最广的一类重要卵寄生性天敌昆虫。为评估其对桃蛀螟卵的寄生潜能,在实验室条件下研究了不同赤眼蜂品系对桃蛀螟卵的功能反应以及自身的干扰反应。结果表明:供试的松毛虫赤眼蜂(TD-SD和TD-XJ)和玉米螟赤眼蜂(TO-SD和TO-JL)对桃蛀螟卵的寄生功能反应均符合HollingⅡ型模型,对桃蛀螟卵均有一定寄生能力。其中TD-XJ品系的a/Th值最大,为19.22,对桃蛀螟卵的寄生能力最强。从功能反应参数的比较中发现,TO-SD、TD-SD、TO-JL和TD-XJ品系赤眼蜂对桃蛀螟卵的寄生上限分别为25.4粒、35.3粒、24.6粒和35.0粒。4个赤眼蜂品系在寄生桃蛀螟卵的过程中均存在自身密度干扰效应。随赤眼蜂密度的增加,其对桃蛀螟卵的寄生率在不断上升,但其对寄主的寻找效应却在不断下降。其中TD-XJ品系对桃蛀螟卵的寻找参数最大,为0.2931。由此可看出,供试的松毛虫赤眼蜂TD-XJ品系对桃蛀螟卵的控制潜能最高。
Trichogramma are important egg parasitoids that are widely used in control of many agricultural and forestry insect pests. To evaluate the potential to parasitize Conogethes punctiferalis eggs, we investigated the functional responses of four Trichogramma strains to C. punctiferalis eggs and their self-density effects in laboratory. The results indicate that functional responses of T. ostriniae(TO-SD and TO-JL) and T. dendrolimi(TD-SD and TD-XJ) to C. punctiferalis eggs fitted well with the Holling II type model and the four strains could parasitize C. punctiferalis eggs. The value of a/Th of TD-XJ strain was 19.22, the highest in the four strains. The maximum parasitizing capacity of TO-SD, TD-SD, TO-JL and TD-XJ to C. punctiferalis eggs was 25.4, 35.3, 24.6, and 35.0, respectively. Self-density effects interfering with parasitizing efficiency were observed in the four Trichogramma strains. The parasitism rate increased with the increase of Trichogramma density, while the searching efficiency decreased. The maximal searching coefficient(Q) was 0.2931 with the TD-XJ strain. The results show that the TD-XJ strain of is prospective for field release.
作者
陈万斌
王勤英
何康来
王振营
CHEN Wanbin;WANG Qingying;HE Kanglai;WANG Zhenying(State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China;College of Plant Protection,Hebei Agricultural University,Baoding 071001,China)
出处
《中国生物防治学报》
CSCD
北大核心
2020年第3期319-326,共8页
Chinese Journal of Biological Control
基金
国家重点研发计划(2018YFD0200602)
国家玉米产业技术体系(CARS-02)。
关键词
桃蛀螟
赤眼蜂
功能反应
寻找效应
Conogethes punctiferalis
Trichogramma
functional response
searching efficiency
