VECTOR CONTROL, PEST MANAGEMENT, RESISTANCE, REPELLENTS Record of Evlachovaea sp. (Hyphomycetes) on Triatoma sordida in the State of Goiás, Brazil, and Its Activity Against Triatoma infestans (Reduviidae, Triatominae)

A fungal isolate was detected on a dead Triatoma sordida (Stål) collected in a peridomestic area in central Brazil. The fungus belongs to Evlachovaea Borisov and Tarasov, a new genus that was recently described in Russia. The isolate seems to be a third species and the second new and undescribed species fromBrazil. The fungus was shown to be active against Triatoma infestans (Klug) third-instar nymphs at a humidity close to saturation. However, activity was reduced at a lower humidity (75%). Values of LC50 varied between 1.1 10 5 and 1.5 10 conidia/cm treated surface, 15 and 20 d after fungal application and incubation at humidity close to saturation. This new fungus may have a potential for biological control of peridomestic ChagasÕ disease vectors during the rainy season.