摘要：Metarhizium anisopliae is an anamorphic fungus widely studied due to its use as a biological control agent. In
Mexico, it is mainly used as an integrated management strategy to control populations of spittlebugs (Hemiptera:
Cercopidae) that affect sugarcane fields and cattle pastures. In this study, 13 strains isolated from Aeneolamia
spp. (Hemiptera: Cercopidae) from the main areas of sugarcane production of Mexico and 11 reference strains of
Metarhizium from different insect hosts and geographic origins were evaluated based on their conidial dimensions,
thermotolerance at 15, 25, 30, and 35 ºC, random amplification of polymorphic DNA (RAPD) patterns using a
combined analysis with 14 different oligonucleotides and diversity estimators, and a phylogenetic analysis with the
ribosomal RNA internal transcribed spacer (ITS) region. All strains used in this study showed typical morphological
characteristics corresponding to M. anisopliae and were able to grow at 25 and 30 ºC with restricted growth at low
(15 ºC) and high temperatures (35 ºC). Polymorphism analysis clustered all strains from Aeneolamia sp. in one welldefined
group with low variability among them. Phylogenetic relationships based on nuclear ribosomal ITS region
sequences recovered a subclade within M. anisopliae formed by 10 of the Mexican strains.
关键词：Metarhizium; Sugarcane; Cattle pastures; ITS region; RAPD
