Potential of entomopathogenic nematodes as biological control agents of sweetpotato weevil (Coleoptera: Curculionidae)

R. K. Jansson, S. H. Lecrone, R. R. Gaugler, G. C. Smart

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Heterorhabditis bacteriophora (HP88) and Steinernema carpocapsae were evaluated as biological control agents of Cylas formicarius elegantulus. All three strains were pathogenic to larvae and pupae. LD50 values of C.f. elegantulus larvae were 2.6, 2.9, and 3.4 infective juveniles per insect for "All', "G-13', and "HP88', respectively. The LD50 values of pupae were 4.9, 5.9, and 4.8 infective juveniles per insect for these three nematodes, respectively. Under simulated field conditions, "G-13' was most efficacious at killing weevil larvae within infested sweet potato roots followed in decreasing order by "HP88' and "All' nematodes. Field applications of "HP88' and "All' nematodes were more effective than chemical insecticides at reducing weevil densities on plants. "HP88' nematodes were more effective than "All' nematodes and chemcial insecticides at reducing weevil damage to fleshy roots. -from Authors

Original languageEnglish (US)
Pages (from-to)1818-1826
Number of pages9
JournalJournal of economic entomology
Volume83
Issue number5
DOIs
StatePublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Ecology
  • Insect Science

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