Seasonal occurrence and relative abundance of aphid predators and parasitoids on pubescent potato plants

John J. Obrycki, Maurice J. Tauber

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26 Scopus citations


During 2 field seasons, Coccinellidae (primarily Coccinella transversoguttata richardsoni, Coleomegilla maculata, Hippodamia convergens, H. tridecimpunctata, and H. glacialis) were the most abundant predators on potato hybrids (Solarium tuberosum X S. berthauldi, F3) with various densities of glandular pubescence. Highly pubescent clones had the highest percentage of predator eggs, while clones with the lowest trichome densities had the highest percentages of immature and adult predators. By comparison, high numbers of aphid parasitoid mummies (primarily Aphidius and Praon spp.) occurred on clones with moderate to high densities of glandular pubescence. During both years, predators and parasitoids were most abundant in late July and August.

Original languageEnglish
Pages (from-to)1231-1237
Number of pages7
JournalThe Canadian Entomologist
Issue number10
StatePublished - Oct 1985

Bibliographical note

Funding Information:
We thank the following people, all from Cornell University: Catherine A. Tauber for identification of Chrysopidae and for her comments; Ward M. Tingey, Alan J. Sawyer, and William F. Mai for their comments and assistance; Robert L. Plaisted for clones from the Cornell potato breeding program; and Jean E. Laubengayer for propagation of plant materials. We acknowledge the help of Emily Favretti, Paul Gross, and Keith Mansfield. This work was supported in part by USDA Competitive Grant 7800454.

ASJC Scopus subject areas

  • Structural Biology
  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Molecular Biology
  • Insect Science


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