Relative pathogenicity of different entomopathogenic fungi to Sitotroga cerealella in stored sorghum
Publication Type
Journal Article
Journal Name
Tropical Science
Publication Date
12-1-2000
Abstract
The pathogenicty of three isolates of Metarhizium anisopliae, three of Beauveria bassiana and one of Nomuraea rileyi to adult Sitotroga cerealella was evaluated in the laboratory. All the isolates were pathogenic to the moth at three concentrations of conidia but pathogenicity varied. The most pathogenic isolates were M. anisopliae CPD 6 (89-100% mortality) followed by M. anisopliae CPD 5 (42-94%), B. bassiana CPD 3 (48-96%) and N. rileyi CPD 1 (33-95%) at 7 days after treatment. The mortalities caused by all these isolates at the highest concentration of 2.6 × 1O9 conidia 50 g-1 of sorghum did not differ significantly from mortality caused by Pirimiphos methyl at 10 ppm. At the same concentration of conidia M. anisopliae CPD 6 had a more rapid action than the other isolates with an LT50 of 2.1 days at 7 days after treatment. All isolates reduced the number of F1 progeny of S. cerealella.
Keywords
Control, Entomopathogenic fungi, Pirimiphos methyl, Progeny production, Sitotroga cerealella, Sorghum
Recommended Citation
Ekesi, S., Akpa, A., & Onu, I. (2000). Relative pathogenicity of different entomopathogenic fungi to Sitotroga cerealella in stored sorghum. Tropical Science, 40 (4), 206-210. Retrieved from https://thehive.icipe.org/all-prp/3959