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journal1 ›› 2018, Vol. 34 ›› Issue (3): 327-335.DOI: 10.16409/j.cnki.2095-039x.2018.03.014

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Hymenopteran Parasitoids Attacking the Beet Webworm, Loxostege sticticalis in China

LUO Lizhi, CHENG Yunxia, JIANG Xingfu, ZHANG Lei   

  1. State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2017-05-04 Online:2018-06-08 Published:2018-06-14

Abstract: To understand the species of natural enemies and roles they played in the population dynamics of the beet webworm, Loxostege sticticalis L. (Lepidoptera:Crambidae), a cosmopolitan insect pest of crops and fodder plants in northern China, we reviewed the species, their targeting host stages and parasitic patterns of the hymenopteran parasitoids attacking L. sticticalis in China. There are totally 36 species in 26 genus documented in China. Of which there are 17 braconids, 14 ichneumonids, 4 trichogrammatids, and 1 preilampid. Among these parasitoids, 4 species attack egg and 32 attack larvae. In the later, there are 3 egg-larval and 2 larval-pupal parasitoids. The larval parasitoids can parasitize 1st to 5th instar, with more species parasitizing young than old larvae. Several species parasitizing the 1st instar complete their development before the host larvae enter into 5th instar. Consequently, the number of parasitoid species present in the 3rd instar is usually more than that found in the 4th to 5th instars. Besides, parasitoids found in cocoons are mainly larva-pupa parasitoids, while there are no confirmed species parasitizing pre-pupa and pupa in China. In terms of parasitic patterns, majority of them are primary parasitoids, endoparasitoids, and solitary parasitoids, only a few species are ectoparasitoids (2), gregarious parasitoids (4) and hyperparasitoids (2).

Key words: Loxostege sticticalis, hymenopteran parasitoids, host stages parasitized, parasitic pattern, biological control

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