Predatory responses of Chrysoperla sinica (Tjeder) and Chrysopa pallens larvae to Aleurocan spinfetus (Quaintance) nymphs
Author of the article:TANG Tian-Cheng1** ZHANG Yan1 LI Cheng-Jin1 CAO Xin-Ran2 CHEN Zhen-Zhen1*** XU Yong-Yu1**
Author's Workplace：1. College of Plant Protection, Shandong Agricultural University, Tai’an 271018, China; 2. Yantai Agricultural Technology Extension Center, Yantai 264001, China
Key Words：Chrysoperla sinica (Tjeder), Chrysopa pallens (Rambur), Aleurocan spinfetus (Quaintance), predation function, self-density, intraspecific interference
Abstract：
[Objectives] To study the predatory responses of Chrysopa sinica (Tjeder) larvae and Chrysopa pallens (Rambur) larvae to Aleurocan spinfetus (Quaintance) nymphs. [Methods] Predatory responses of C. sinica and C. pallens larvae to A. spinfetus nymphs, and mutual interference among 3rd instar larvae, were measured at (25±1) ℃ under laboratory conditions. [Results] Predatory responses of all larval stages of C. sinica and C. pallens were of the Holling type, and the number of nymphs preyed on increased with increasing density. The density equations of C. sinica and C. pallens larvae were E= 0.753 0×P–0.134 8 and E=0.697 5×P–0.164 6, respectively and their intraspecific interference equations were A=2.362 6×P–0.231 8 and A=2.429 6×P–0.225 6, respectively. [Conclusion] Both C. sinica and C. pallens larvae have substantial potential as biological controls for A. spinfetus.