Developmental disruption of Pseudoplusia includens and Heliothis virescens larvae by the calyx fluid and venom of Microplitis demolitor

Calyx fluid and venom from the braconid parasitoid Microplitis demolitor differentially affected the development of Pseudoplusia includens and Heliothis virescens. P. includens exhibited delays in larval development, supernumerary instars, and formed larval-pupal intermediates when injected with 0.0...

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Bibliographic Details
Published inArchives of insect biochemistry and physiology Vol. 18; no. 3; p. 131
Main Authors Strand, M.R. (University of Wisconsin, Madison, WI), Dover, B.A
Format Journal Article
LanguageEnglish
Published United States 1991
Subjects
Animals
Body Fluids - physiology
CHRYSODEIXIS
DESARROLLO BIOLOGICO
DEVELOPPEMENT BIOLOGIQUE
HELIOTHIS VIRESCENS
Larva - drug effects
Larva - parasitology
LARVAS
LARVE
METAMORFOSIS
METAMORPHOSE
MICROGASTER
Moths - drug effects
Moths - growth & development
Moths - parasitology
MUDA
MUE
PARASITE
PARASITOS
VENENOS
VENIN
VIRUS DE INVERTEBRADOS
VIRUS DES INVERTEBRES
Wasp Venoms - isolation & purification
Wasp Venoms - pharmacology
Wasps - chemistry
Wasps - pathogenicity
Wasps - physiology
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Summary:Calyx fluid and venom from the braconid parasitoid Microplitis demolitor differentially affected the development of Pseudoplusia includens and Heliothis virescens. P. includens exhibited delays in larval development, supernumerary instars, and formed larval-pupal intermediates when injected with 0.01-0.10 wasp equivalents of calyx fluid. In contrast, H. virescens was relatively unaffected by calyx fluid regardless of dose. Venom did not affect the development of either host species, but appeared to synergize the activity of calyx fluid. This was particularly evident in H. virescens, where injection of 0.10-0.20 wasp equivalents of calyx fluid and venom induced the formation of a large number of intermediates while the same amount of calyx fluid did not. The particulate portion of M. demolitor calyx fluid was the only component that caused developmental delays and the formation of intermediates in both host species. Purified virus caused developmental alterations in P includens, while trioxsalen treated calyx fluid did not affect development of P includens or H. virescens. These data suggest the requirement for venom in parasitism may differ between host species, and that dosage plays an important role in interpreting the interaction between calyx and venom components
Bibliography:H10
9184919
ISSN:0739-4462
1520-6327
DOI:10.1002/arch.940180302