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Related Experiment Videos

Effect of combining imidacloprid and diatomaceous earth with Beauveria bassiana on mole cricket (Orthoptera:

Sarah R Thompson1, Rick L Brandenburg

  • 1Department of Entomology, North Carolina State University, Box 7613, Raleigh, NC 27695, USA.

Journal of Economic Entomology
|January 2, 2007
PubMed
Summary

Beauveria bassiana (B. bassiana) combined with diatomaceous earth (DE) showed synergistic effects against southern mole crickets. However, B. bassiana did not synergize with imidacloprid, suggesting a reduced pesticide approach for mole cricket control.

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Area of Science:

  • Entomology
  • Agricultural Science
  • Pest Management

Background:

  • Southern mole crickets (Scapteriscus borellii) are significant agricultural pests.
  • Integrated pest management strategies are crucial for sustainable agriculture.
  • Beauveria bassiana is an entomopathogenic fungus used for insect control.

Purpose of the Study:

  • To evaluate the efficacy of Beauveria bassiana strains against southern mole crickets.
  • To investigate the synergistic or antagonistic interactions between B. bassiana and common pesticides (diatomaceous earth and imidacloprid).
  • To provide a basis for reduced pesticide approaches in mole cricket management.

Main Methods:

  • Topical application of sublethal doses of three B. bassiana strains to adult mole crickets.

Related Experiment Videos

  • Combination treatments with diatomaceous earth (DE) and imidacloprid.
  • Mortality and survival time assessments at 28 days post-treatment.
  • Statistical analysis to determine additive, synergistic, or antagonistic effects.

    • Main Results:

    • High doses of B. bassiana strains significantly increased mortality and reduced survival time.
    • Two B. bassiana strains (5977 and 3622) showed synergistic interactions with DE, enhancing mortality beyond additive effects.
    • DE aids B. bassiana efficacy by abrading the cuticle and absorbing lipids.
    • No synergistic interactions were observed between B. bassiana and imidacloprid; some antagonistic effects were noted.
    • Imidacloprid alone caused high mortality, limiting the potential for synergistic effects in combination treatments.

    Conclusions:

    • Beauveria bassiana demonstrates potential for mole cricket control, particularly when combined with diatomaceous earth.
    • The combination of B. bassiana and DE offers a promising strategy for integrated pest management of mole crickets.
    • Imidacloprid is not a suitable partner for B. bassiana in mole cricket control due to lack of synergy and potential antagonism.
    • These findings support the development of reduced pesticide programs for effective mole cricket management.