An assessment of interspecific competition between two introduced parasitoids of Diaphorina citri (Hemiptera: Liviidae)on caged citrus plants  

作　　者：Meghan A.Vankosky Mark S.Hoddle 

机构地区：[1]Department of Entomology,University of Califomia,Riverside,Califomia,USA [2]Center for Invasive Species Research,University of California,Riverside,California,USA

出　　处：《Insect Science》2019年第1期119-127,共9页昆虫科学（英文版）

摘　　要：Two parasitoids attacking nymphs of Asian citrus psyllid,Diaphorina citri Kuwayama (Hemiptera:Liviidae),Tamarixia radiata (Waterston)(Hymenoptera:Eulophi- dae)and Diaphoreneyrtus aligarhensis (Shafee,Alam &Agarwal)(Hymenoptera:Encyrtidae)are being released in California,USA in a classical biological control program. To evaluate the effect of multiple parasitoid species on D.citri mortality,we conducted mesocosm experiments under controlled conditions using a complete block design with 6 treatments (D.cirri nymphs exposed to:no parasitoids;D.aligarhensis or T.radiata alone;D.aligarhensis or T.radiata released first (by 48 h);and both species released simultaneously).Parasitism of D.citri nymphs by T.radiata exceeded 60%and was unchanged when D.aligarhensis were present.Parasitism by D.aligarhensis was greatest when T. radiata was absent (-28%)and was reduced in all treatments with T.radiata present (<3%).D.cirri mortality and parasitoid-related mortality olD.citri was consistent across parasitoid treatments.Laboratory results suggest that competition between D.aligarhensis and T.radiata is asymmetric and favors T.radiata.It may be difficult for D.aligarhensis to contribute significantly to D.cirri biological control where T.radiata is present.However, results reported here suggest that competition between T.radiata and D.aligarhensis is not likely to reduce parasitism by T.radiata or reduce parasitoid-induced mortality of D.citri.

关 键 词：Asian CITRUS PSYLLID classical biological control competition Diaphorencyrtus aligarhensis Tamarixia RADIATA 

分 类 号：Q[生物学]