The species Helicoverpa armigera is one of the most important polyphagous and widely distributed pests in the world. Its occurrence was recently reported on soybean and cotton, in the states of Goiás, Mato Grosso and Bahia, Brazil. This study aimed to evaluate the occurrence and density of Helicoverpa armigera in Mato Grosso do Sul State, an important pest for agriculture and identified in Brazil in 2013. 81 Delta trap baited with H. armigera sex pheromone Biocontrole® were installed in 26 counties in the State of Mato Grosso do Sul. Results showed that H. armigera was observed in all counties installed with Delta traps. Furthermore, over 80% of collected moths belong to the H. armigera species, and the cotton regions apparently show a highest occurrence of H. armigera in the pheromone traps.
Key words: Monitoring, sex pheromone, sampling.
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