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1 January 2008 Immature Development of Cotesia vestalis (Hymenoptera: Braconidae), an Endoparasitoid of Plutella xylostella (Lepidoptera: Plutellidae)
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Abstract
Cotesia vestalis (Haliday) (Hymenoptera: Braconidae) is one of the most important biological control agents of the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae). Immature development of C. vestalis was studied by dissecting parasitized hosts in the laboratory at 25 ± 1°C and 60–65% RH. Results showed that the egg matured in 2 d. Larvae seemed to have three instars; the first two larval instars molted inside the host, and the third instar emerged from the host to spin a cocoon. The first, second, and third instars lasted 2, 5, and 1 d, respectively. The first instar is transparent and caudate-mandibulate with a large head, distinct mandibles, and a caudal projection. The second instar is semitransparent with an anal vesicle. The third instar larva is yellowish green and the body is slightly curved. The pupa develops for 5 d and is bright yellow with transparent antennae, wings, and legs. All stages were fully documented with microscopic photos.
Rui-Xian Yu, Min Shi, Fang Huang and Xue-Xin Chen "Immature Development of Cotesia vestalis (Hymenoptera: Braconidae), an Endoparasitoid of Plutella xylostella (Lepidoptera: Plutellidae)," Annals of the Entomological Society of America 101(1), (1 January 2008). https://doi.org/10.1603/0013-8746(2008)101[189:IDOCVH]2.0.CO;2
Received: 30 January 2007; Accepted: 1 October 2007; Published: 1 January 2008
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