摘要
【目的】以核桃黑斑蚜和核桃全斑蚜为集团外猎物,研究七星瓢虫在不同集团外猎物种类及密度下对异色瓢虫卵的集团内捕食的作用,为综合应用两种捕食性瓢虫控制核桃黑斑蚜与核桃全斑蚜提供理论依据。【方法】在室内温度(25±1)℃、相对湿度(60±10)%、光周期L∶D=14∶10的人工气候箱中,观察记录在不同密度的核桃黑斑蚜和核桃全斑蚜条件下,七星瓢虫1龄幼虫对异色瓢虫卵和不同核桃蚜虫的日平均捕食量。【结果】随着核桃黑斑蚜和核桃全斑蚜密度的增加,七星瓢虫对异色瓢虫卵的日平均捕食量显著下降,而对核桃黑斑蚜与核桃全斑蚜的日平均捕食量极显著上升。当集团外猎物为核桃全斑蚜时,与集团外猎物为核桃黑斑蚜相比较,七星瓢虫1龄幼虫对异色瓢虫卵的集团内捕食作用随着核桃全斑蚜密度增加下降更快。【结论】随着集团外猎物密度的增加,能有效降低七星瓢虫对异色瓢虫卵的集团内捕食,且不同猎物种类影响不同。
【Objective】The study aims to clarify the intraguild predation of Coccinella septempunctata on Harmonia axyridis with different extraguild prey species and densities,expecting to provide a theoretical basis for the comprehensive application of the two types of predatory ladybugs to control C.juglandicola and P.juglandis.【Methods】In the climatic chamber with a constant temperature of(25±1)℃,(60±10)%RH,and photoperiod of 14∶10(L∶D)h,the number of daily average predation of 1st instar larvae of C.septempunctata on eggs of H.axyridis and walnut aphids were evaluated.【Results】The results showed that the number of daily average predation of C.septempunctata on eggs of H.axyridis decreased significantly while on C.juglandicola and P.juglandis increased significantly with the increasing density of C.juglandicola and P.juglandis.With the extraguild prey P.juglandis,the intraguild predation of 1st instar larvae of C.septempunctata on eggs of H.axyridis decreased faster compared with the extraguild prey of C.juglandicola as the increase of prey density.【Conclusion】With the increase of extraguild prey density,the intragruild predation of C.septempunctata on H.axyridis can be effectively reduced,and the effects of different prey species were different.
作者
文霞
郭发城
高桂珍
WEN Xia;GUO Facheng;GAO Guizhen(College of Forestry and Landscape Architecture,Xinjiang Agricultural University,Urumqi 830052,China)
出处
《新疆农业科学》
CAS
CSCD
北大核心
2024年第2期441-447,共7页
Xinjiang Agricultural Sciences
基金
新疆维吾尔自治区自然科学基金项目(2020D01A55)
新疆维吾尔自治区天山英才计划。
关键词
七星瓢虫
异色瓢虫
核桃黑斑蚜
核桃全斑蚜
集团内捕食作用
Coccinella septempunctata
Harmonia axyridis
Chromaphis juglandicola
Panaphis juglandis
intraguild predation
