Suitability of Chinese oak silkworm eggs for the multigenerational rearing of the parasitoid Trichogramma leucaniae

Trichogramma leucaniae is believed to be an efficient biological control agent for controlling the soybean pod borer [SPB; Leguminivora glycinivorella]. The large eggs of Chinese oak silkworm, Antheraea pernyi, are one of the best alternative host for mass production of Trichogramma. However, they a...

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Bibliographic Details
Published in:PloS one 2020-04, Vol.15 (4), p.e0231098-e0231098
Main Authors: Xu, Wei, Wen, Xuan-Ye, Hou, Yang-Yang, Desneux, Nicolas, Ali, Asad, Zang, Lian-Sheng
Format: Article
Language:English
Subjects:
Adults
Aluminum
Animals
Antheraea pernyi
Biological control
Biology and Life Sciences
Bombyx - parasitology
Borers
Butterflies & moths
Ecology and Environmental Sciences
Eggs
Eggs - parasitology
Engineering and Technology
Feasibility
Female
Glycine max - parasitology
Host-Parasite Interactions
Humans
Hymenoptera - growth & development
Hymenoptera - pathogenicity
Insecticides
Laboratories
Leguminivora glycinivorella
Male
Mass production
Ovum - parasitology
Parasitoids
Pest Control, Biological - methods
Rice
Seeds
Silkworms
Soybeans
Trichogramma leucaniae
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Summary:Trichogramma leucaniae is believed to be an efficient biological control agent for controlling the soybean pod borer [SPB; Leguminivora glycinivorella]. The large eggs of Chinese oak silkworm, Antheraea pernyi, are one of the best alternative host for mass production of Trichogramma. However, they are considered poor host for the growth and development of T. leucaniae. Here, we determine the feasibility of successive rearings of T. leucaniae on the large eggs for eight generations and evaluated their capacity of parasitizing SPB eggs of different ages. In the first four generations, the suitability of T. leucaniae reared on large eggs exhibited a significant increasing tendency and then decreased with the successive generations thereafter. The percentage of parasitized eggs and number of emerged adults per egg were increased from 40.0% and 10.8 adults/egg in F1 generation to 86.7% and 36.4 adults/egg in F4 generation respectively. In addition, T. leucaniae reared on A. pernyi for four generations significantly parasitized more SPB eggs regardless of egg age compared with those reared on Corcyra cephalonica eggs. These results provided useful information on the feasibility of mass production of T. leucaniae by reared for successive generations on A. pernyi large eggs.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0231098