Armyworms cover 75% of Brazil’s major maize state
The major pest on Brazil’s major agricultural state’s maize crop in the last planting season proved to be fall armyworms (Spodoptera frugiperda). Infestations covered over three quarters of Mato Grosso’s maize area, national media report. They cite figures from the Mato Grosso soybean grower association, the Aprosoja, whose surveys revealed that incidences of the pest were reported in 76.6% of maize areas. The study found that 67% of growers made just one insecticide application to control the armyworms along with the use of Bt maize. Of those, 31.4% made not even the one application. Another 31% of those interviewed only applied insecticides, according to Agrolink newswire. More than four in five surveyed growers adopted refuge areas. The next major pest was the stink bug (Dichelops melacanthus), which covered 52.3% of the state’s maize area. The data were revealed at an Aprosoja and agricultural research corporation the Embrapa-hosted event, O Circuito Tecnológico - Etapa Milho.