Abstract

An artificial medium is reported which permitted Dioryctria abietella (Denis & Schiffermuller) to be reared through successive generations with higher survival, fecundity, and growth rate than were attained when the insect was reared on its natural food, pine cones. Methods devised for rearing enabled separation of eggs from deposition site, surface sterilization of eggs, and tagging adults with fluorescent paint for recovery of individuals. Two indices, a larval growth rate index and a rearing index, were devised to permit rapid and easy comparisons of the effects of food on the insects reared.

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