Lack of effects of Bacillus sphaericus (Vectolex) on nontarget organisms in a mosquito-control program in southeastern Wisconsin: a 3-year study. - Merritt RW; Lessard JL; Wessell KJ; Hernandez O; Berg MB; Wallace JR; Novak JA; Ryan J; Merritt BW (Journal of the American Mosquito Control Association, 2005)