Armstrong, Arístides M. “Susceptibility of the Diamondback Moth, Plutella Xylostella (L) (Lepidoptera; Yponomeutidae), to Insecticide Sprays on Cabbage”. The Journal of Agriculture of the University of Puerto Rico, vol. 74, no. 2, Apr. 1990, pp. 153-66, doi:10.46429/jaupr.v74i2.6548.