Skip to main content
Other
Sunflower Beetle (Coleoptera: Chrysomelidae): Pattern of Larval Distribution and Parasitism in Cultivated Sunflower Fields
Faculty Publications: Department of Entomology
  • Gary J. Brewer, University of Nebraska-Lincoln
  • Laurence D. Charlet, USDA, ARS, Northern Crop Science Laboratory
Date of this Version
1-1-2004
Disciplines
Comments

Published in JOURNAL OF THE KANSAS ENTOMOLOGICAL SOCIETY 77(1), 2004, pp. 21–25.

Abstract
The sunflower beetle, Zygogramma exclamationis (Fabricius), is a major pest of commercial sunflower, Helianthus annuus L. (Asteraceae), in the Plains area of central North America. Although an economic injury level for the sunflower beetle has been determined, in-field distributions of the larvae and their natural enemies have not been described. Over a three year period, fields were sampled for sunflower beetle larvae and for larvae of the endoparasitoid, Myiopharus macellus (Reinhard). Sunflower beetle larvae were generally found to have aggregated distributions. Knowledge of the distribution pattern will allow the development of more efficient sunflower beetle sampling protocols. Parasitism rates of M. macellus throughout fields were equivalent, indicating effective host searching. Although the data supports aggregated distributions for M. macellus, it is less clear than that for the sunflower beetle.
Citation Information
Gary J. Brewer and Laurence D. Charlet. "Sunflower Beetle (Coleoptera: Chrysomelidae): Pattern of Larval Distribution and Parasitism in Cultivated Sunflower Fields" (2004)
Available at: http://works.bepress.com/gary_brewer/12/