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- Title
Immature Development of Cotesia vestalis (Hymenoptera: Braconidae), an Endoparasitoid of Plutella xylostella (Lepidoptera: Plutellidae).
- Authors
Rui-Xian Yu; Min Shi; Fang Huang; Xue-Xin Chen
- 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.
- Subjects
BRACONIDAE; PLUTELLIDAE; LARVAE; BIOLOGICAL control of insects; PARASITOIDS; DEVELOPMENTAL biology
- Publication
Annals of the Entomological Society of America, 2008, Vol 101, Issue 1, p189
- ISSN
0013-8746
- Publication type
Article
- DOI
10.1603/0013-8746(2008)101[189:IDOCVH]2.0.CO;2