Reproductive biology of cephalonomia hyalinipennis (Hymenoptera: bethylidae), a native parasitoid of the coffee berry borer, hypothenemus hampei (Coleoptera: scolytidae), in Chiapas, Mexico

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The coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), is the most important pest of coffee worldwide. Cephalonomia hyalinipennis Ashmead (Hymenoptera: Bethylidae) was recently discovered naturally attacking H. hampei in Mexico. C. hyalinipennis both preys upon and parasitizes H. hampei. We report laboratory investigations on the reproductive biology of C. hyalinipennis aimed at assessing the suitability of this parasitoid for culturing and release in biological control programs. Adult females lived up to 95 days (mean for mated females = 57 days), and risk of death increased with age. Mating status, reproductive effort, and female size influenced adult female longevity, but only weakly. The number of H. hampei preyed upon did not affect longevity. Rates of attack (predation plus parasitism) declined with age, but the proportion of attacked H. hampei that were parasitized increased. Overall, about half of the attacked H. hampei were preyed upon and half were parasitized. Females received approximately 46 sperm per mating and 77% became sperm depleted before the end of their reproductive lives. Estimated mean lifetime fecundity was 88 eggs. Offspring survival from egg to adulthood was 60%, with batches of eggs tending to survive or die collectively; 21.2% of surviving progeny were males. These results suggest that C. hyalinipennis may be suitable for mass rearing and release, but further work is needed to investigate interactions between C. hyalinipennis and other parasitoids of H. hampei. Copyright 1999 Academic Press. eng

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