Field Treatment of Desert Locust ( Schistocerca gregaria Forskal) Hoppers in Mauritania Using an Oil Formulation of the Entomopathogenic Fungus Metarhizium flavoviride

Autor:	O. Douro-Kpindou, J. Langewald, C. Kooyman, H. O. Mohamed, A. O. Dahmoud, C. J. Lomer
Rok vydání:	1997
Předmět:	biology business.industry fungi Pest control Biological pest control biology.organism_classification Metarhizium flavoviride Acrididae Horticulture Insect Science parasitic diseases Botany Entomopathogenic fungus Schistocerca Desert locust business Nymph Agronomy and Crop Science
Zdroj:	Biocontrol Science and Technology. 7:603-612
ISSN:	1360-0478 0958-3157
DOI:	10.1080/09583159730659
Popis:	A field trial was conducted to test the efficacy of an oil formulation of the entomopathogenic fungus , Metarhizium flavoviride Gams & Rozsypal (Deuteromycotina: Hyphomycetes) , as a control agent for the desert locust , Schistocerca gregaria Forskal (Orthoptera: Acrididae) , in Mauritania . The treatment was applied to hopper bands in the field . In caged samples of the treated insects , 99% mortality was observed in 15 days . On average during application only 51% of the hoppers received spray droplets directly , the additional mortality being due to pick - up of spores from the spray residue . This mortality was assessed by exposing insects to a treated plot at intervals , and monitoring disease levels during subsequent incubation in cages . The spray residue remained highly infective for a period of 6 days after application . The number of nymphs in the hopper bands was estimated using a computer - based photographic image - processing technique . Unfortunately , most of the hopper bands dispersed int...
Databáze:	OpenAIRE
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