[Potential of Metarhizium anisopliae and Beauveria bassiana isolates and neem oil to control the Aphid Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae)].
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.
de Araujo
José M
JM
Depto. de Agronomia, Univ. Federal Rural de Pernambuco, Dos Irmaos, Recife, PE. jma_junior@yahoo.com.br
Marques
Edmilson J
EJ
de Oliveira
José V
JV
D000818:Animals; D001042:Aphids; D052982:Beauveria; D002629:Chemosterilants; D005989:Glycerides; D052981:Metarhizium; D010572:Pest Control, Biological; D013729:Terpenes
D002629:Chemosterilants; D005989:Glycerides; D013729:Terpenes; C002443:neem oil