中国生物防治学报2025，Vol.41Issue(5)：1046-1053,8.DOI:10.16409/j.cnki.2095-039x.2025.01.015
苹果黄蚜天敌大草蛉与异色瓢虫的集团内捕食效应测定
Determination of the Intraguild Predation between Chrysopa pallens and Harmonia axyridis,Two Natural Enemies of Aphis citricola
摘要
Abstract
There may be mutual predation among multiple natural enemies of a pest,namely intraguild predation(IGP).The intensity of IGP is usually influenced by the developmental stages of natural enemies and the density of extraguild prey(EGP).This experiment measured the IGP between Chrysopa pallens(CL)and Harmonia axyridis(HL),two dominant natural enemies of Aphis citricola,with different combinations of larval instars(CL2+HL2,CL2+HL3 and CL2+HL4;CL3+HL2,CL3+HL3 and CL3+HL4).And then the effects of different densities of A.citricola(EGP)on IGP were also measured.The results showed that the IGP intensity(IGP level,IL)between CL2+HL2,CL3+HL2,and CL3+HL3 were all 1.0;The IL of CL2+HL3 and CL3+HL4 was 0.5 and 0.3,respectively.Direction index(DI)of IGP and asymmetry of IGP(AI)of all the above combinations were all 1.0,indicating that intraguild predator(IG predator)within above groups was C.Pallens.Both IL and AI of CL2+HL4 were 1.0,but the DI was 0.0,indicating that IG predator in this group was the 4th instar larvae of H.axyridis.In addition,the IL of CL3+HL2 and CL2+HL4 reached 1.0 within 3 hours of coexistence,indicating that these are the strongest IGP groups.Further measurements revealed that IL in both CL3+HL2 and CL2+HL4 decreased with increasing density of A.citricola,and caused a delay in the occurrence of IGP,6-24 hours for the low density treatment,6-24 and 9-24 hours for the medium density,and no IGP occurring in CL2+HL4 at the high density.In summary,C.Pallens larvae generally acts as a dominant predator when compared with H.axyridis,but their IGP intensity and occurrence period are influenced by the developmental stages of the predators and the density of EGP.The results of this experiment lay a solid foundation for further exploration of IGP between C.pallens and H.axyridis as well as the influencing factors and provide important references for the scientific combination of the two natural enemies in controlling A.citricola.关键词
集团内捕食/大草蛉/异色瓢虫/苹果黄蚜Key words
intraguild predation/Chrysopa pallens/Harmonia axyridis/Aphis citricola分类
植物保护学引用本文复制引用
王嘉蕾,金社林,孙元星,郭建国..苹果黄蚜天敌大草蛉与异色瓢虫的集团内捕食效应测定[J].中国生物防治学报,2025,41(5):1046-1053,8.基金项目
绿肥果园害虫生态控制(GSAU-JSYF-2024-10) （GSAU-JSYF-2024-10）
甘肃农业大学伏羲青年英才培养计划(Gaufx-03Y05) （Gaufx-03Y05）
国家绿肥产业技术体系(CARS-22-G20) （CARS-22-G20）
甘肃省科学技术厅重点研发计划(24YFNA002) （24YFNA002）
