Ramalho, Francisco de Sousa, et al. “Methods Insecticide Application Against Cotton Boll Weevil and Pink Bollworm”. Pesquisa Agropecuaria Brasileira, vol. 27, no. 7, July 1992, pp. 987-9, https://doi.org/10.1590/S1678-3921.pab1992.v27.3732.