EFFICACY OF Isaria fumosorosea AND Metarhizium flavoviride AGAINST CORN PESTS UNDER LABORATORY AND FIELD CONDITIONS IN EGYPT
M. M. SABBOUR *
Department of Pests and Plant Protection, National Research Centre, Dokki, Cairo, Egypt.
*Author to whom correspondence should be addressed.
Abstract
The entomopathogenic fungi consider among the perfect pathogen against pests. The lethal concentrations 50% under laboratory conditions (LC50) obtained was 132x104, 136x104 and 146x104 spores/ml after Ostrinia nubilalis, Sesamia cretica and Chilo agamemnon were treated with serial different concentrations of the fungus Metarhizium flavoviride, respectively. Also, the corresponding pests when treated with the fungus Isaria fumosorosea the corresponding lethal concentrations 50(LC50) was 156 x104 and 169x104 and 165x104 spores/ml, respectively.
Under field applications results obtained show that the assessment of damage caused by corn borers in corn field area, which detected that the weight of corn crop in the plots treated with the fungus M. flavoviride and the fungus I. fumosorosea were significantly increased to 4888±81.20 and 3900±60.70 as compared to 2610±30.90 kg/ (feddan) in the control plots during season 2013., respectively. During season 2014 the corresponding weight of corn crop were, 4991±49.43, 3999±43.14 and 2500±53.20 kg/feddan respectively.
Keywords: Isaria fumosorosea, Metarhizium flavoviride, Ostrinia nubilalis, Chilo agamemnon, Sesamia cretica