View source for Entomophaga (1996) 41, 217-224

{{Publication
|Publication authors=M. Kenis
|Author Page=Marc Kenis
|Publication date=1996
|dc:title=Factors affecting sex ratio in rearing of ''[[Coeloides sordidator (parasitoid)|Coeloides sordidator]]'' (Hym.: Braconidae)
|Publication journal=Entomophaga
|prism:volume=41 (2)
|prism:startingPage=217
|Last page=224
|DOI=10.1007/BF02764247
|Publication abstract=Five factors known to affect the sex ratio (% of males) in parasitic Hymenoptera were investigated for ''Coeloides sordidator'' a parasitoid of ''Pissodes'' weevils. The host age, the age of ovipositing females, and the host of origin had a significant impact on the sex ratio of offspring. In contrast, the number of ovipositing females had an insignificant effect on sex ratio whereas the effect of host density could not be clearly defined. The sex ratio decreased with host age, probably because, like many other hymenopteran parasitoids, females tend to lay male eggs on small hosts and female eggs on larger hosts in order to maximize the size and fitness of their female offspring. The sex ratio also varied with the age of the mother, younger females laying more male eggs and older females more female eggs. The host of origin also had an influence on sex ratio. The strain from ''Pissodes castaneus'' was significantly more male-biased than the strain from ''P. validirostris'', which corroborates previous observations made on field populations.
|AbstractCC=Yes
|Research topic=biocontrol - natural enemies
|Benf research=rearing/culturing/mass production
|Is book=No
}}
{{Pest record
|Pest=Pissodes castaneus
|Quarantined=No
}}
{{Pest record
|Pest=Pissodes validirostris
|Quarantined=No
}}
{{Beneficial record
|Beneficial=Coeloides sordidator (parasitoid)
|Pest=Pissodes castaneus
}}
{{Beneficial record
|Beneficial=Coeloides sordidator (parasitoid)
|Pest=Pissodes validirostris
}}