External Morphology and Development of Immature Stages of Diadegma semiclausum (Hymenoptera: Ichneumonidae), an Important Endoparasitoid of Plutella xylostella (Lepidoptera: Plutellidae)

Fang Huang; Min Shi; Xue-Xin Chen; Gong-Yin Ye; Jun-Hua He

doi:10.1603/008.102.0325

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1 May 2009 External Morphology and Development of Immature Stages of Diadegma semiclausum (Hymenoptera: Ichneumonidae), an Important Endoparasitoid of Plutella xylostella (Lepidoptera: Plutellidae)

Fang Huang, Min Shi, Xue-Xin Chen, Gong-Yin Ye, Jun-Hua He

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Annals of the Entomological Society of America, 102(3):532-538 (2009). https://doi.org/10.1603/008.102.0325

Abstract

Diadegma semiclausum (Hellén) (Hymenoptera: Ichneumonidae) is one of the most important biological control agents of the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae). Each immature stage of D. semiclausum was studied by dissecting parasitized hosts in the laboratory at 22 ± 1°C and 70–75% RH. Results show that the egg is hymenopteriform, lacking appendages. The larvae seem to be hypermetamorphic, with four instars. The pupal period has two distinct phases: 1) phase I, larval-like with remarkable groups of urate cells; and 2) phase II, exarate pupal appearance with a pigmentation sequence of eyes, ocelli, mandibles, thorax, abdomen, and antennae. All stages and sequences are illustrated with detailed photomicrographs.

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Fang Huang, Min Shi, Xue-Xin Chen, Gong-Yin Ye, and Jun-Hua He "External Morphology and Development of Immature Stages of Diadegma semiclausum (Hymenoptera: Ichneumonidae), an Important Endoparasitoid of Plutella xylostella (Lepidoptera: Plutellidae)," Annals of the Entomological Society of America 102(3), 532-538, (1 May 2009). https://doi.org/10.1603/008.102.0325

Received: 12 March 2008; Accepted: 1 March 2009; Published: 1 May 2009

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