Tuesday, 19 November 2002 - 11:48 AM

This presentation is part of : Ten-Minute Papers, Subsection Ca. Biological Control

Manipulating floral density in ornamental landscapes to encourage natural enemies of herbivorous insects

Ashley B. Bennett1, Lawrence M. Hanks1, and Cliff S. Sadof2. (1) University of Illinois, Department of Entomology, 320 Morrill Hall, Urbana, IL, (2) Purdue University, Department of Entomology, 1158 Smith Hall, West Lafayette, IN

A principle tenet of conservation biological control is that some natural enemies feed on floral resources and so can be encouraged by providing them flowers. Our study focuses on the effect that floral density has upon population regulation of the plant feeding pest pine needle scale. We planted four species of perennial flowering plants (white clover, goldenrod, euphorbia, and coreopsis) around pine trees that were infested with the herbivores. Three densities of flowers were used: no flowers, a low density of flowers, and a high density of flowers. Rates of predation and parasitism were significantly greater in study plots having higher densities of flowers, enhancing biological control of the pest.

Species 1: Homoptera Diaspididae Chionaspis pinifoliae (Pine Needle Scale)
Keywords: conservation biological control, parasitoid

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