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Chinese Journal of Biological Control ›› 2024, Vol. 40 ›› Issue (6): 1221-1227.DOI: 10.16409/j.cnki.2095-039x.2024.03.016

• RESEARCH REPORTS •    

Predation of Aphidoletes aphidimyza on Megoura crassicauda

WU Huizi1,2, HUANG Chunyang1, WEN Mingxia1, ZHANG Weiye2, YU Xiaofei4, YANG Maofa3,4, ZHANG Feng2   

  1. 1. Zunyi Branch of Guizhou Tobacco Company, Zunyi 564200, China;
    2. Laboratory of Insect Taxonomy & Aquatic Insects/College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China;
    3. Institute of Entomology, Guizhou University/Guizhou Provincial Key Laboratory for Agricultural Pest Management in the Mountainous Region, Guiyang 550025, China;
    4. College of Tobacco Science, Guizhou University, Guiyang 550025, China
  • Received:2023-12-04 Published:2024-12-12

Abstract: To determine the predation capacity of Aphidoletes aphidimyza to Megoura crassicauda, the functional responses of A. aphidimyza to M. crassicauda at different stages, the prey selection of A. aphidimyza on M. crassicauda at different stages and the interference effect of the density of A. aphidimyza on its predation capacity were studied in the laboratory. The results showed that the functional response of A. aphidimyza to each developmental stage of M. crassicauda was all fitted to the Holling II model. The predation capability of A. aphidimyza on young nymphs aged 1―2 of M. crassicauda was the strongest with a value of 16.23, followed by the 3rd instar nymph and the 4th instar nymph, with a value of 12.05 and 10.55, respectively. The daily maximum predation amount of A. aphidimyza on 1st―2nd instar nymph, 3rd instar nymph and 4th instar nymph of M. crassicauda were 29.24, 24.88, and 22.57. A. aphidimyza has a strong preference for the 1st―2nd instar nymph of M. crassicauda, with a selection coefficient (Q) of 1.67, 1.42, and 1.31, respectively. The total predation amount of A. aphidimyza on M. crassicauda increased with the density of A. aphidimyza, but the predation amount per predation number and predation rate decreased with the density of A. aphidimyza. The relationship between the rate and the density of A. aphidimyza were in line with the model E1=0.2279p-0.519, E2=0.2093p-0.550 and E3=0.2022p-0.527, respectively. The results showed that A. aphidimyza had strong predation capability in each of the different developmental stages of M. crassicauda. This provides a theoretical foundation and data support for the pest control of M. crassicauda by A. aphidimyza.

Key words: Aphidoletes aphidimyza, Megoura crassicauda, functional response, interference effect, predation preference, biological control

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