The effect of Ageratum fastigiatum extract on Rhodnius nasutus, vector of Chagas disease - Avelar-Freitas, B A; Dias, J VL; Tibães, G G; Rocha, C A; Bahia-Oliveira, G H; Grael, C FF; Pires, H HR (Rev Bras Farmacogn, 2013)