title: Laboratory bioassays of entomopathogenic fungi for control of Delia radicum (L.) larvae.
abstract: Laboratory soil bioassays were performed at economic field rates for in-furrow (3.85 x 10(6)spores/g dry soil) and broadcast (3.85 x 10(5)spores/g dry soil) applications with three isolates of Metarhizium anisopliae (F52, ATCC62176, and ARSEF5520) and one isolate of Beauveria bassiana (GHA). All isolates tested were infective to second instar Delia radicum (L.). The conditionally registered M. anisopliae isolate (F52) performed best killing an average of 85 and 72% of D. radicum larvae at the high and low concentration, respectively. The mean LC50 and LC95 of F52 against second instar D. radicum was 2.7 x 10(6) and 1.8 x 10(8)spores/g dry soil, respectively. The use of F52 in an integrated management program is discussed.
authors.affiliation: USDA-ARS, Horticultural Crops Research Laboratory, 3420 NW Orchard Avenue, Corvallis, OR 97330, USA. bruckd@onid.orst.edu
authors.forename: Denny J
authors.initials: DJ
authors.lastname: Bruck
authors.forename: Jane E
authors.initials: JE
authors.lastname: Snelling
authors.forename: Amy J
authors.initials: AJ
authors.lastname: Dreves
authors.forename: Stefan T
authors.initials: ST
authors.lastname: Jaronski
mesh_terms: D000818:Animals; D001681:Biological Assay / Q000379:methods*; D004175:Diptera / Q000382:microbiology*; D006999:Hypocreales / Q000502:physiology*; D010572:Pest Control, Biological / Q000379:methods*; D012988:Soil Microbiology; D013172:Spores, Fungal / Q000502:physiology