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The yellowmargined leaf beetle, Microtheca ochroloma Stal (Coleoptera: Chrysomelidae), is a pest that causes economic losses in the production of crucifers (Brassicaceae) in Argentina and the southeastern USA. Biological control using the entomopathogenic fungus Isaria fumosorosea Wize (Hypocreales: Cordycipitaceae) is an option for suppressing pest populations. This study evaluated the effect of this fungus on herbivory by adult beetles when they were fed leaves treated with I. fumosorosea. Four concentrations (0.1, 0.5, 1.0, and 2.0 g) of the formulation PFR-97 20% WDG Apopka strain 97 per 100 ml of distilled water and a distilled water only control were evaluated. Two trials each with 10 bok choy plants per treatment were performed, and each plant was infested with six adult beetles. On the seventh day, leaf area consumed by the beetles was measured. In the first trial, plants applied with 1.0 and 2.0 g/100 ml suffered significantly less damage than the control. In the second trial, there was a significant difference between the control and concentration of 2.0 g/100 ml. The control had 3.7 and 2.0% more damage compared to the other treatments in the first and second trials, respectively.Ceiba, 2016. Volumen 54(2):118-126

ceiba

Efecto del Hongo Isaria fumosorosea Wize Sobre la Herbivoría por los Adultos del Escarabajo de Margen Amarillo, Microtheca ochroloma Stal (Coleoptera: Chrysomelidae)