Title: Pathogenicity and Biological Characterization of Entomopathogenic Fungi Isolated from Corn Earworm, Helicoverpa armigera (Hubner) (Lepidoptera:Noctuidae)
Abstract:Two novel entomopathogenic fungal isolates, IPLB-1 and IPLB-2, were isolated from a diseased larva of Helicoverpa armigera among a laboratoryreared population collected from a sweet sorghum field. Mo...Two novel entomopathogenic fungal isolates, IPLB-1 and IPLB-2, were isolated from a diseased larva of Helicoverpa armigera among a laboratoryreared population collected from a sweet sorghum field. Morphological characterization revealed that bothisolates are under the genus Metarhizium. Sequence analysis of the ITS-5.8s rDNA region showed higher homology of IPLB-1 (JQ086358) and IPLB-2 (JQ086359)to Metarhizium flavoviride var. flavoviride (AY646398.1) compared to Beauveria bassiana and Paeclomyces sp. The two isolates were found to be highly pathogenic to H. armigera with LC50 values of 3.290 x 105 and3.737 x 105 for IPLB-1 and IPLB-2 isolates, respectively, to 7days old larvae at seven days after infection. The results indicate that these novel entomopathogenic fungi have potential to control H. armigera. Studies on its virulence and effectivity to larvae of H. armigera in different instars, among many, are necessary to determine the potential of these entomopathogenic fungi as biological control agents. Search for other possible insect hosts for these fungal isolates will expand their usefulness.Read More
Publication Year: 2011
Publication Date: 2011-04-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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