Seasonal abundance and parasitism of the sunflower beetle (Coleoptera: Chrysomelidae) on cultivated sunflower in the Northern Great Plains

@article{Charlet1992SeasonalAA,
  title={Seasonal abundance and parasitism of the sunflower beetle (Coleoptera: Chrysomelidae) on cultivated sunflower in the Northern Great Plains},
  author={Laurence D. Charlet},
  journal={Journal of Economic Entomology},
  year={1992},
  volume={85},
  pages={766-771}
}
  • L. Charlet
  • Published 1 June 1992
  • Biology
  • Journal of Economic Entomology
Postdiapause adults of the sunflower beetle, Zygogramma exclamationis (F.), appeared in plots of sunflower, Helianthus annuus L., between 28 May and 9 June and were present until mid-July 1985-1987. Peak density of adults occurred between 13 and 23 june when plants had 6-15 leaves. Eggs were present on plants for approximately 1 mo (June) with maximum egg densities occurring between 13 and 26 June. Larvae were initially observed between 10 and 19 June when plants had 5-12 leaves and were… 
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