Density dependence and the augmentative release of egg parasitoids against graminaceous stalk borers

Abstract
1. The augmentative release of Trichogranznza species for the biological control of graminaceous stalkborers is reviewed.2. Previous experiments indicate strong density dependence acting on the early larval stages of the sorghum stalkborer (Chilo partellus). These data are described by a simple model for density dependence, whose properties are briefly described.3. The effects upon the total mortality of different levels of egg parasitism are discussed when combined with density dependent larval losses that vary from under‐ to over‐compensating.