The influence of host fruit morphology on parasitization rates in the Caribbean fruit fly,Anastrepha suspensa |
| |
Authors: | J Sivinski |
| |
Institution: | (1) Insect Attractants, Behavior and Basic Biology Research Laboratory Agriculture Research Service, U.S. Department of Agriculture, 32604 Gainesville, Florida |
| |
Abstract: | Among the host fruits of the Caribbean fruit fly there are a variety of sizes and shapes. These morphological differences
may influence the vulnerability of the larvae to parasites. In the laboratory, Caribbean fruit fly larvae placed in the smaller
of 2 different sizes of artificial ‘fruit’ (cloth spheres filled with a diet material) were parasitized at a higher rate by
the braconid,Diachasmimorpha longicaudata (Ashmead) when spheres were presented separately. However, when parasites were simultaneously presented with 6 different
sizes of ‘fruit’ there was no significant relationship between size and parasitization rate. This may be due to the parasites
preference to search for larvae in larger ‘fruit’. In field collections of different species of host fruit, a significant
inverse correlation exists between fruit radius and rate of parasitization. However, host fruit size accounts for only about
5% of the variance in yearly parasitization rates.
|
| |
Keywords: | Anastrepha Diachasmimorpha host vulnerability densitydependent mortality inundative release Biosteres |
本文献已被 SpringerLink 等数据库收录! |
|