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Chinese Journal of Biological Control ›› 2023, Vol. 39 ›› Issue (2): 254-263.DOI: 10.16409/j.cnki.2095-039x.2022.03.012

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Population Fitness of the Hoverfly, Episyrphus balteatus (De Geer) (Diptera:Syrphidae) Fed on Different Aphid Species

JIANG Shanshan1, LI Hui1, HE Limei2, WU Kongming1   

  1. 1. State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610000, China
  • Received:2022-03-11 Published:2023-04-13

Abstract: Episyrphus balteatus (De Geer) is one of the most common predatory natural enemies in agricultural ecosystems. It has dual ecological service functions of pollination and biological control and plays an important role in improving crop yield and protecting biodiversity. However, the proper aphid species for artificial rearing of the predator is still unclear. Our study on the relationship between three aphid species, Aphis craccivora Koch, Myzus persicae Sulzer, and Megoura japonica Matsumura and fitness of E. balteatus showed that the developmental durations of larva (5.9 d) and pupa (6.0 d) with M. japonica were significantly shorter than those with the other preys, and the larval survival rate (80.0%) was the largest; the highest pupation rate (88.4%) and pupal emergence rate (100.0%) were attained with the prey A. craccivora, the lowest pupation rate (47.6%) and pupal emergence rate (49.6%) were recorded with M. persicae; With A. craccivora, M. persicae and M. japonica, the average generation period (T) of the predator was 30.26 d, 32.41 d and 32.34 d, respectively; the intrinsic rate of increases (r) was 0.1581, 0.0953 and 0.1424, respectively; and the finite rate of increase (λ) was 1.1713, 1.1002 and 1.1531, respectively. Flight ability tests showed that prey species had a significant effect on the flight velocity of adults, the highest velocity (0.29 m/s) was recorded with the prey M. japonica, in contrast to the lowest velocity (0.23 m/s) with M. persicae. This study indicates that M. japonica is a suitable aphid species for artificial rearing of E. balteatus, which is of theoretical and practical significance for large-scale rearing and utilization of the biocontrol and pollination ecological service functions of E. balteatus.

Key words: Episyrphus balteatus, development, fecundity, life history, aphid species

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