Abstract
Codling moth larvae parasitized by Ascogaster quadridentata are commonly devoid of any internal reproductive organs and exhibit precocious behaviour. It was found that castration could be avoided if host exposure to the parasitoid was delayed until “late” in host embryogenesis. To be effective, the agent causing castration had to be introduced prior to 64h of host embryonic development. If parasitized after 64h, the diminutive host testes underwent a normal maturation sequence. Pseudoparasitized host pupae have external sex characteristics, but no internal sex tissues, indicating a predilection of the castrating agent for mesodermal rather than ectodermal tissue. Host castration was not required for successful parasitoid emergence. The agent causing the castration and its mechanism are unknown. This is the first evidence of host castration occurring during embryogenesis. Speculation is made regarding the benefit of host castration to the parasitoid.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
