The effect of mating behaviour on progeny sex ratio ofMastrus ridens(Hymenoptera: Ichneumonidae), a biological control agent of codling moth

Autor:	J. G. Charles, W.R.M. Sandanayaka, A. Chhagan, H. N. De Silva, N.E.M. Page-Weir
Rok vydání:	2011
Předmět:	Tortricidae biology Codling moth Zoology biology.organism_classification Parasitoid Toxicology Lepidoptera genitalia Ichneumonidae Insect Science Mastrus ridens Mating Agronomy and Crop Science Sex ratio
Zdroj:	Biocontrol Science and Technology. 21:485-496
ISSN:	1360-0478 0958-3157
DOI:	10.1080/09583157.2011.552103
Popis:	Mastrus ridens (Horstmann) (Hymenoptera: Ichneumonidae) was imported into quarantine as a potential biocontrol agent for codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae). Mating behaviour of the parasitoid and its effect on progeny sex ratio (as a proportion of males) were studied to help sustain the laboratory culture. Both females and males were reproductively active soon after emergence. Unmated females produced only male progeny, confirming males developed from unfertilized eggs. The proportion of males in a progeny was independent of the copulation period (24–40 s) of the parents. The progeny sex ratios from three parent ratios (f:m 2:1, 1:1 and 1:2) were not significantly different. Females effectively mated only once but males mated frequently in their lifetime. The progeny sex ratios from single females with a known single mating and possible multiple matings (through exposure to two males for 18 days) were not significantly different. However, when males copulated with five ...
Databáze:	OpenAIRE
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