Infection of Schistocerca gregaria (Orthoptera: Acrididae) hoppers by Metarhizium flavoviride (Deuteromycotina: Hyphomycetes) conidia in an oil formulation applied under desert conditions.
The efficacy of an oil formulation of conidia of Metarhizium flavoviride for control of hopper bands of Schistocerca gregaria was studied in desert conditions in south-central Mauritania. Spores were formulated in 70% kerosene and 30% groundnut oil at a concn of 2.5 × 1012 spores/litre. Four bands of 3rd- to 5th-instar nymphs, varying in size from 100 m2 to 2.5 ha, were treated. It is concluded that the oil formulation of M. flavoviride was able to control hoppers of S. gregaria under desert conditions.