title: [Potential of Metarhizium anisopliae and Beauveria bassiana isolates and neem oil to control the Aphid Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae)].
abstract: This work aimed to determine the efficiency of the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana to control the aphid Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae) in kale Brassica oleracea var acephala D.C., as well as their compatibility with a neem oil formulation (Neemseto). Ten isolates of both fungi were tested and the most pathogenic ones were B. bassiana CG001 and M. anisopliae CG30 with 90% and 4.4 days, and 64% and 3.8 days of mortality and median lethal time, respectively. Bioassays with neem at concentrations of 0.5, 1.0 and 2.0% were done either by leaf discs dipping or spraying the aphids on the leaf discs. The neem spraying treatment at 2.0% provided 90% mortality. The use of B. bassiana isolate CG001 or M. anisopliae isolate CG30 with neem at 0.125, 0.25, and 0.5%, demonstrated that these isolates could have their spore viability or colony growth affected when exposed to neem concentrations higher than 0.25%. In absolute values, the isolates B. bassiana CG001 and M. anisopliae CG30 are the most virulent to L. erysimi, and could be utilized in the management of this pest.
authors.affiliation: Depto. de Agronomia, Univ. Federal Rural de Pernambuco, Dos Irmaos, Recife, PE. jma_junior@yahoo.com.br
authors.forename: José M
authors.initials: JM
authors.lastname: de Araujo
authors.forename: Edmilson J
authors.initials: EJ
authors.lastname: Marques
authors.forename: José V
authors.initials: JV
authors.lastname: de Oliveira
mesh_terms: D000818:Animals; D001042:Aphids; D052982:Beauveria; D002629:Chemosterilants; D005989:Glycerides; D052981:Metarhizium; D010572:Pest Control, Biological; D013729:Terpenes
chemical_list: D002629:Chemosterilants; D005989:Glycerides; D013729:Terpenes; C002443:neem oil