[Short article] Paecilomyces formosus , a new pathogen of Osphranteria coerulescens from Iran

Document Type : Short Article

Authors

1 : Plant Protection research Department, South-Khorasan Agricultural and Natural Resources Research Center, AREEO, Birjand, Iran

2 Plant Protection research Department, South–Khorasan Agricultural and Natural Resources Research Center, AREEO, Birjand, Iran

3 Plant Protection Research Department, South–Khorasan Agricultural and Natural Resources Research Center, AREEO, Birjand, Iran

Abstract

The Rosaceous long–horned beetle (Osphranteria coerulescens) attacks a range of fruit trees belonging to Rosaceae family. Starting from May to February 2012, samples of branches infected with O. coerulescens were collected from almond and apricot orchards in South Khorasan province of Iran and subsequently the fungal pathogens were isolated and identified. Based on the morphological characteristics of the isolated fungus, it was identified as Paecilomyces formosus and in the phylogenetic study the representative isolate was located in clade of P. formosus. In evaluating the efficiency of fungal arrays, the mean mortality rate of larvae at concentrations of 104, 105 and 106 spores per ml of was 44, 72 and 86, respectively. The LC50 for beetle larvae were calculated as 2×104 spores per ml. In the present study, isolation and pathogenicity of P. formosus on this insect is reported for the first time both in Iran and worldwide based on morphological and molecular data. Due to the high mortality rate of this fungal array on the larvae of the beetle pest, the potential of its application in the integrated pest control program can be considered.

Keywords

References

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