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Chinese Journal of Biological Control ›› 2023, Vol. 39 ›› Issue (2): 271-279.DOI: 10.16409/j.cnki.2095-039x.2022.01.020

• RESEARCH REPORTS • Previous Articles     Next Articles

Predation and Control of Franklinilla intonsa by Neoseiulus bicaudus

WANG Jiayang1, LAN Biyun1, FANG Chen1, HU Hengxiao1, YANG Ruitong1, MU Kaiqin1, SU Jie1, LU Yanhui2, ZHANG Jianping1   

  1. 1. College of Agriculture, Shihezi University/Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, Xinjiang Uygur Autonomous Region, Shihezi 832003, China;
    2. Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2022-01-19 Published:2023-04-13

Abstract: Neoseiulus bicaudus is an important predator in Xinjiang. This study aims to understand the predatory ability of N. bicaudus on Frankliniella intonsa and whether the predation capacity would change with addition of host plant pollen. The predation capacity of different stages of the predator on the pest was measured at different prey densities, and the predatory ability of adult predatory mites on the lst instar nymphs of F. intonsa was also measured with addition of fresh cotton pollen. Furthermore, the field control effect of the predator was determined during cotton flowering stage. The results showed that, the predator’s consumption increased with the increase of the prey density. Female adult predators preferred the 2st instar nymphs over the lst instar nymphs, and the maximum predation rate reached 6.1 nymphs/day. However, when pollen was added, the predator’s consumption decreased with the increase in pollen amount, and was even significantly lower at enough pollen addition than when no pollen was added, and the predatory functional response changed from Holling-II to Holling-III. For controlling F. intonsa in cotton fields, the optimal release ratio of predator to prey was 1:1. In conclusion, N. bicaudus has a good predatory ability on F. intonsa 1st instar and can be used for biological control of F. intonsa.

Key words: Neoseiulus bicaudus, Franklinilla intonsa, pollen, predation evaluation

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