海岛小花蝽对茶黄蓟马捕食作用及选择偏好  

Predation and Preference of Orius maxidentex Ghauri on Scirtothrips dorsalis Hood

作　　者：李金磊 王建赟 韩姗妮 符悦冠[1] 叶政培 周世豪[2] 韩冬银[1] LI Jinlei;WANG Jianyun;HAN Shanni;FU Yueguan;YE Zhengpei;ZHOU Shihao;HAN Dongyin(Environment and Plant Protection Institute,Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Integrated Pest Management on Tropical Crops,Ministry of Agriculture and Rural Affairs/Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests,Haikou 571101,China;College of Forestry,Hainan University,Haikou 570228,China;College of Plant Protection,Hainan University,Haikou 570228,China)

机构地区：[1]中国热带农业科学院环境与植物保护研究所/农业农村部热带作物有害生物综合治理重点实验室/海南省热带农业有害生物监测与控制重点实验室,海口571101 [2]海南大学林学院,海口570228 [3]海南大学植物保护学院,海口570228

出　　处：《中国生物防治学报》2024年第3期550-558,共9页Chinese Journal of Biological Control

基　　金：海南省重点研发项目(ZDYF2021XDNY140);中国热带农业科学院“揭榜挂帅”项目(1630042022007);国家重点研发计划(2017YFD0202100)。

摘　　要：为评价海岛小花蝽Orius maxidentex Ghauri对茶黄蓟马Scirtothrips dorsalis Hood的控害潜能,在室内测定了海岛小花蝽对茶黄蓟马的捕食能力和捕食选择性。结果表明:海岛小花蝽1龄若虫不取食茶黄蓟马,2龄若虫可取食少量的茶黄蓟马1龄和2龄若虫,3龄若虫至成虫均可取食茶黄蓟马各龄若虫及成虫;海岛小花蝽3龄若虫至成虫对茶黄蓟马2龄若虫和成虫的捕食量由大到小均依次为5龄若虫,成虫,4龄若虫,3龄若虫,其中5龄若虫最大,取食量分别为茶黄蓟马2龄若虫31.60头/d、成虫30.80头/d;海岛小花蝽3龄若虫至成虫对茶黄蓟马的捕食作用均符合HollingⅡ功能反应模型,捕食量均随着猎物密度的增加而升高,搜寻效应均随着猎物密度增加而下降;海岛小花蝽对茶黄蓟马干扰反应符合HasseⅡ模型方程,当茶黄蓟马密度不变时,随着海岛小花蝽自身密度的增加,单头捕食量逐渐降低;海岛小花蝽3龄若虫至成虫均对茶黄蓟马1龄若虫的喜好指数Ci>0,对茶黄蓟马成虫喜好指数Ci<0,表明其对茶黄蓟马低龄若虫有较高的捕食偏好。本研究结果表明海岛小花蝽对茶黄蓟马具有较好的防控潜能。The control potential of Orius maxidentex Ghauri against Scirtothrips dorsalis Hood was evaluated through investigating the predation ability and selectivity of O.maxidentex in laboratory.The results showed that the first instar nymphs of O.maxidentex did not predate on S.dorsalis,whereas the second instar nymphs predated on a small number of the first and second instars of S.dorsalis.From the third instar nymphs to adults,O.maxidentex predated on all stages of S.dorsalis.The predation of O.maxidentex on the second instar nymphs and adults of S.dorsalis ranked from high to low was fifth instars,adults,fourth instars,and third instars.The daily maximum predation of the fifth instar O.maxidentex on the 2nd instar nymphs and adults of S.dorsalis were 31.60/d and 30.80/d,respectively.The predation of O.maxidentex from the third instar nymphs to adults on S.dorsalis fitted well with the HollingⅡfunctional response model.The predation increased with the increase of prey density,and the search efficiency decreased with the increase of prey density.The disturbance response was consistent with the HasseⅡmodel equation.At a certain S.dorsalis density,the predation of an individual O.maxidentex decreased gradually with the increase of its self-density.The preference coefficient of O.maxidentex from the 3rd instar nymphs to adults for the first instar S. dorsalis nymphs was greater than 0 (Ci>0), whereas that for S. dorsalis adults was smaller than 0 (Ci<0). The results of present study show that O. maxidentex prefer to prey on the young nymphs of S. dorsalis.

关 键 词：海岛小花蝽 茶黄蓟马 捕食功能反应 干扰反应 捕食偏好 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]