Impacts of 2 species of predatory Reduviidae on bagworms in oil palm plantations  

作　　者：Syari Jamian Ahmad Norhisham Amal Ghazali Azlina Zakaria Badrul Azhar 

机构地区：[1]Faculty of Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia [2]Cardiff School of Biosciences, Cardiff University, Cardiff, Wales, UK [3]Faculty of Forestry, Universiti Putra Malaysia, Serdang, Selangor, Malaysia [4]Sime Darby Research Sdn. Bhd., Banting, Selangor, Malaysia [5]Biodiversity Unit, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia

出　　处：《Insect Science》2017年第2期285-294,共10页昆虫科学（英文版）

摘　　要：Integrated pest management （IPM） is widely practiced in commercial oil palm agriculture. This management system is intended to minimize the number of attacks by pest insects such as bagworms on crops, as well as curb economic loss with less dependency on chemical pesticides. One practice in IPM is the use of biological control agents such as predatory insects. In this study, we assessed the response of predatory natural enemies to pest outbreak and water stress, and document the habitat associations of potential pest predators. The abundances of 2 predatory insect species, namely Sycanus dichotomus and Cosmolestes pictieeps （Hemiptera： Reduviidae）, were compared bagworm outbreak sites and nonoutbreak sites within oil palm plantations. We also examined habitat characteristics that influence the abundances of both predatory species. We found that the abundance of C. picticeps was significantly higher in bagworm outbreak sites than in nonoutbreak sites. There were no significant differences in the abundance ofS. dichotomus among outbreak and non-outbreak sites. Both species responded negatively to water stress in oil palm plantations. Concerning the relationship between predatory insect abundance and in situ habitat quality characteristics, our models explained 46.36% of variation for C. picticeps and 23.17% of variation for S. dichotomus. Both species of predatory insects thrived from the planting of multiple beneficial plants in oil palm plantations. The results suggest that C. picticeps can be used as a biological agent to control bagworm populations in oil palm plantations, but S. dichotomus has no or little potential for such ecosystem service.Integrated pest management （IPM） is widely practiced in commercial oil palm agriculture. This management system is intended to minimize the number of attacks by pest insects such as bagworms on crops, as well as curb economic loss with less dependency on chemical pesticides. One practice in IPM is the use of biological control agents such as predatory insects. In this study, we assessed the response of predatory natural enemies to pest outbreak and water stress, and document the habitat associations of potential pest predators. The abundances of 2 predatory insect species, namely Sycanus dichotomus and Cosmolestes pictieeps （Hemiptera： Reduviidae）, were compared bagworm outbreak sites and nonoutbreak sites within oil palm plantations. We also examined habitat characteristics that influence the abundances of both predatory species. We found that the abundance of C. picticeps was significantly higher in bagworm outbreak sites than in nonoutbreak sites. There were no significant differences in the abundance ofS. dichotomus among outbreak and non-outbreak sites. Both species responded negatively to water stress in oil palm plantations. Concerning the relationship between predatory insect abundance and in situ habitat quality characteristics, our models explained 46.36% of variation for C. picticeps and 23.17% of variation for S. dichotomus. Both species of predatory insects thrived from the planting of multiple beneficial plants in oil palm plantations. The results suggest that C. picticeps can be used as a biological agent to control bagworm populations in oil palm plantations, but S. dichotomus has no or little potential for such ecosystem service.

关 键 词：bagworms beneficial plants biological control habitat quality integratedpest management oil palm predatory insects 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治] TQ925[农业科学—植物保护]