Effect of the fungus Metarhizium anisopliae var. acridum on non-target arthropods in Brazil

A biopesticide based on the fungus Metarhizium anisopliae var. acridum, isolate CG 423, has shown to be efficient against the grasshopper Rhammatocerus schistocercoides (Rehn), a serious agricultural pest in Mato Grosso, Brazil. In order to assess the effects of this biopesticide on nontarget arthropods, field tests were carried out in Mato Grosso State, in natural vegetation, during the period of occurrence of young nymphs of R. schistocercoides, normal target of the mycopesticide. The experimental protocol consisted of two four-hectare blocks (200 x 200m). One block was sprayed with a dosage equivalent to 2.2x1012 viable conidia per hectare. This dosage causes approx. 46.7% mortality twelve days after application as shown in another experiment. The other block was used as control and no application was made. In each block the insect fauna was sampled 2-3 days before spraying and 9-10 to 17-18 days after spraying, using Malaise, "window" and "yellow bowl" traps. Data analysis was performed regarding insect orders and families. The results demonstrated that the biopesticide can strongly affect the grasshopper target populations, but has no or few impact on non target fauna. [Texte intégral]

Bibliographic Details

Main Authors:	Foucart, Antoine, Lecoq, Michel, Magalhaes, Bonifacio P., De Faria, Marcos R., Schmidt, F.G.V., Da Silva, João Batista Tavares
Format:	conference_item biblioteca
Language:	eng
Published:	SIP
Subjects:	H10 - Ravageurs des plantes, Metarhizium anisopliae, biopesticide, champignon entomopathogène, effet secondaire, Arthropoda, http://aims.fao.org/aos/agrovoc/c_27229, http://aims.fao.org/aos/agrovoc/c_27467, http://aims.fao.org/aos/agrovoc/c_2587, http://aims.fao.org/aos/agrovoc/c_141, http://aims.fao.org/aos/agrovoc/c_635, http://aims.fao.org/aos/agrovoc/c_4650, http://aims.fao.org/aos/agrovoc/c_1070,
Online Access:	http://agritrop.cirad.fr/510382/
Tags:	Add Tag No Tags, Be the first to tag this record!