Estimation of median lethal concentration of three isolates of Beauveria bassiana for control of Megacopta cribraria (heteroptera: Plataspidae) bioassayed on solid Lygus spp. Diet

Maribel Portilla, Walker Jones, Omaththage Perera, Nick Seiter, Jeremy Greene, Randall Luttrell

Research output: Contribution to journalArticlepeer-review

Abstract

The kudzu bug, Megacopta cribraria (F.), is an urban nuisance and significant agricultural pest. The median lethal concentrations of three strains of Beauveria bassiana (Balsamo), including the Mississippi Delta native strain (NI8) isolated from Lygus lineolaris (Palisot de Beauvois), the commercial strain BotaniGard® (GHA) (Victor, NY, USA), and the B. bassiana strain isolated from M. cribraria (KUDSC), were estimated on kudzu bug adults. A technique developed to evaluate B. bassiana against L. lineolaris was used. Younger adults (eight days after collection) were treated with NI8 and GHA and older adult (50 days after collection) were treated with NI8, GHA and KUDSC. Higher concentrations (n × 106, n ×107) of NI8 and GHA caused kudzu bug mortality two days after treatment in younger adults and similar concentrations of NI8, GHA, and KUDSC caused mortality one day after treatment in older adults. Lower concentrations (n ×104, n ×105) were not significantly different in mortality between strains. LS50 values of the KUDSC were significantly lower than NI8 and GHA values in older adults. This is the first available information on median lethal concentration of B. bassiana on kudzu bug adults bioassayed on artificial diet. It was determined that B. bassiana (KUDSC and NI8) are highly effective for young adults at very low doses (LC50 1.98-4.98 viable spores per mm2).

Original languageEnglish (US)
Article number31
JournalInsects
Volume7
Issue number3
DOIs
StatePublished - Sep 2016
Externally publishedYes

Keywords

  • Beauveria bassiana
  • Biological control
  • GHA
  • Kudzu bugs
  • Megacopta cribraria
  • NI8
  • Solid diet

ASJC Scopus subject areas

  • Insect Science

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