Location: Pest Management Research Unit
Title: Entomopathogenic fungi in cornfields and mortality of larval western corn rootworm Diabrotica Virgifera Virgifera Authors
|Rudeen, Melissa -|
|Petzold-Maxwell, Jennifer -|
|Gassman, Aaron -|
Submitted to: Journal of Invertebrate Pathology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 30, 2013
Publication Date: N/A
Interpretive Summary: Insect pathogenic fungi are very common both in the soil and on plants and they affect many insect include the corn rootworm. The project reported here was to survey the soil in 10 Iowa farm fields to determine prevalence of these fungi. The two major species of insect pathogenic fungi were present in half of the sample d soils, and some of these were more efficacious than the current commercial fungus.
Technical Abstract: Entomopathogenic Ascomycete fungi are ubiquitous in soil and on phylloplanes, and are important natural enemies of many arthropods, including larval western corn rootworm, Diabrotica virgifera virgifera, which is a major pest of corn. We measured the prevalence of Beauveria bassiana and Metarhizium anisopliae sensu lato in ten cornfields in Iowa, USA by baiting with larval insects. Beauveria bassiana and M. anisopliae s.l. were present in 60% and 55% of soil samples, respectively. Subsequent laboratory bioassays found that some M. anisopliae s.l. collected from cornfields killed a greater proportion of D. v. virgifera larvae than a standard commercial strain.