黄玛草蛉幼虫对草地贪夜蛾卵和低龄幼虫的捕食能力  

Predatory capability of Mallada basalis (Neuroptera: Chrysopidae) larvae on the eggs and early instar larvae of Spodoptera frugiperda (Lepidoptera: Noctuidae)

作　　者：施琳琳 李子园 林丹敏 陆永跃[1] 陈科伟[1,2] SHI Lin-Lin;LI Zi-Yuan;LIN Dan-Min;LU Yong-Yue;CHEN Ke-Wei(College of Plant Protection,South China Agricultural University,Guangzhou 510642,China;Key Laboratory of Bio-Pesticide Innovation and Application,Guangdong Province,Guangzhou 510642,China)

机构地区：[1]华南农业大学植物保护学院,广州501642 [2]广东省生物农药创制与利用重点实验室,广州501642

出　　处：《昆虫学报》2022年第10期1324-1333,共10页Acta Entomologica Sinica

基　　金：广东省重点领域研发计划项目(2020B020223004);广东省自然科学基金项目(2019A1515010588);广东省甘蔗/剑麻产业技术体系创新团队项目(2022KJ104-08);广东省现代农业产业共性关键技术研发创新团队建设项目(2022KJ134)。

摘　　要：【目的】明确本地优势天敌黄玛草蛉Mallada basalis对入侵我国的重大农业害虫草地贪夜蛾Spodoptera frugiperda卵及低龄幼虫的捕食能力和生防潜力。【方法】在实验室条件下采用功能反应模型评价了黄玛草蛉2和3龄幼虫对草地贪夜蛾卵及1和2龄幼虫的捕食能力。【结果】黄玛草蛉幼虫对草地贪夜蛾卵和低龄幼虫的捕食量均随猎物密度的升高而增加,最后趋于捕食饱和状态,而其捕食率随猎物密度的升高而逐步下降,对不同发育阶段的草地贪夜蛾均表现为Ⅱ型功能反应。黄玛草蛉2龄幼虫对草地贪夜蛾卵及1和2龄幼虫的瞬时攻击率a分别为0.150,0.084和0.094,处理时间Th分别为0.282,0.333和0.519 h,理论日最大捕食量T/Th分别为85106粒、72072头和46.242头;黄玛草蛉3龄幼虫对草地贪夜蛾卵及1和2龄幼虫的瞬时攻击率分别为2.018,0.288和0.259,处理时间分别为0.102,0.311和0.375 h,理论日最大捕食量分别为235294粒、77170头和64000头。【结论】黄玛草蛉2和3龄幼虫对草地贪夜蛾卵和低龄幼虫均具较强的捕食能力,其中黄玛草蛉3龄幼虫比2龄幼虫具有更强的捕食效率。【Aim】To evaluate the predatory capability and biological control potential of the native natural enemy Mallada basalis on the eggs and early instar larvae of the fall armyworm,Spodoptera frugiperda invading China.【Methods】The predatory capabilities of the 2nd and 3rd instar larvae of M.basalis on the eggs,the 1st and 2nd instar larvae of S.frugiperda were evaluated by using functional response models under laboratory conditions.【Results】The numbers of eggs and larvae of S.frugiperda consumed by M.basalis larvae increased and saturated as the prey density increased,while the predation rate of M.basalis larvae decreased with the increase of prey density.M.basalis larvae exhibited a typeⅡfunctional response to different developmental stages of S.frugiperda.For the 2nd instar larvae of M.basalis,their instantaneous attack rates a on the eggs,and the 1st and 2nd instar larvae of S.frugiperda were 0.150,0.084 and 0.094,the handling time Th was 0.282,0.333 and 0.519 h,and the theoretical daily maximum predation T/Th was 85106,72072 and 46242,respectively.For the 3rd instar larvae of M.basalis,their instantaneous attack rates on the eggs,and the 1st and 2nd instar larvae of S.frugiperda were 2.018,0.288 and 0.259,the handling time was 0.102,0.311 and 0.375 h,and the theoretical daily maximum predation was 235294,77.170 and 64.000,respectively.【Conclusion】Both the 2nd and 3rd instar larvae of M.basalis exhibit strong predatory capability on the eggs and early instar larvae of S.frugiperda,and the 3rd instar larvae of M.basalis show higher predation efficiency than the 2nd instar larvae.

关 键 词：黄玛草蛉 草地贪夜蛾 捕食 功能反应 生物防治 

分 类 号：Q968[生物学—昆虫学]