Abstract
Abstract. The Plains lubber grasshopper, Brachystola magna Girard (Orthoptera: Romaleidae), is the main insect pest of bean, Phaseolus vulgaris L. (Fabales: Fabaceae), in Chihuahua, Durango, and Zacatecas states of Mexico. Satisfactory control depends on diligent application of insecticide; however, given its evasive ethology and relentless arrival at bean fields, management is difficult. The use of entomopathogenic fungi has been proposed as an alternative, because they are effective and environmentally friendly. The aim of this study was to isolate and identify taxa of entomopathogenic fungi based on morphological and molecular characteristics and evaluate biological activity under laboratory conditions against B. magna adults. The Hypocreales genera of Metarhizium Sorokin and Beauveria (Balsamo) Vuillemin entomopathogenic fungi were isolated and identified based on morphological and molecular characteristics. Under laboratory conditions, the life cycles were completed in 5.6 to 8.0 days for Metarhizium...
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