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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (15): 143-147.doi: 10.11924/j.issn.1000-6850.casb2024-0709

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Predation Characteristics of Arma chinensis to Larvae of Argyrogramma agnata

ZENG Rong1(), WU Jian1, BAI Tao1, CAI Yongzhan1, PENG Ruiqi1, MA Chan1, ZHANG Ruojing1, YANG Qingqing2, REN Wei2()   

  1. 1 Qujing Branch, Yunnan Tobacco Company, Qujing, Yunnan 655000
    2 Yunnan Green Leaf Bio-control Technology Co., Ltd., Yuxi, Yunnan 653100
  • Received:2024-11-25 Revised:2025-02-27 Online:2025-05-25 Published:2025-05-29

Abstract:

The aim is to clarify the biological control potential of Arma chinensis to larvae of Argyrogramma agnata. Under indoor controlled light, temperature and humidity conditions, the nymphs and adults of A. chinensis were fed with the 2nd to 5th stage larvae of A. agnata in different densities, the predation characteristics of A. chinensis and the survival number of larvae of A. agnata in each treatment were observed and recorded. The results showed that there were significant differences in the total predation amount of 2-5 instar nymphs and adults of A. chinensis against the larvae of A. agnata at different densities (P=0.000). The density of A. chinensis significantly affected its predatory behavior and ability. The total predation increased with the increase of the density of A. chinensis, while the average predation per head decreased with the increase of the density. In addition, there was a significant positive correlation between predation and instar size, that is, the greater the instar, the greater the predation. Both the total predation and the average predation per head were higher in adults than in nymphs of the 2nd to 5th instar of A. chinensis. As a potential predatory predator, the adult and 4-5 instar nymphs of A. chinensis have strong predatory ability. It is suggested to use the adult and 4-5 instar nymphs of A. chinensis to control the larvae of A. agnata, which can achieve better control effect.

Key words: Arma chinensis, Argyrogramma agnata, instar, density, predation characteristics