Pathogenicity of Hypocrealean fungal isolates against Peregrinus maidis, Delphacodes kuscheli (Hemiptera: Delphacidae) and Dalbulus maidis (Hemiptera: Cicadellidae), vectors of maize pathogens

TOLEDO, A. V.; MARINO, A.; CLAUDIA CRISTINA LOPEZ LASTRA

MYCOPATHOLOGIA

Springer

Año: 2007 vol. 163 p. 225 - 232

0301-486X

Preliminary screening assays were carried out on 17 isolates of five fungal species Beauveria bassiana , Lecanicillium muscarium, Metarizhium  anisopliae, Isaria farinosa and I . fumosorosea . The three most effective isolates against Peregrinus maidis (Hemiptera: Delphacidae) were B. bassiana CEP 147 , CEP 150 and CEP 189 . There were no consistent differences found in females regarding fungal susceptibility . However , more females than males were proportionally infected . There was not a correlation between the percentage of conidial germination and the percentage of mortality caused a cumulative mortality of 68.9 % after 7 days post inoculation , was selected to be assayed against adults of P. maidis, Delphacodes kuscheli (Hemiptera: Delphacidae) and Dalbulus maidis (Hemiptera : Cicadellidae). In pathogencity tests significant differences were observed among treatments. After 2 weeks post inoculation both D. kuscheli (cumulative mortality of 73. 3 %) and P. maidis (cumulative mortality of 68.6 %) were significantly more susceptible than D. maidis (cumulative mortality of 49.9 % ) to the selected isolate.