The esterase isocnzyme electrophoresis showed that the pigment glands and gossypol had no significant effects on the number of isozyme bands, but on the staining deepness and width of the zymograms.

• 棉酚的作用与色素腺体相似，但饲以0．225%25的棉酚的棉铃虫体内出现两条新的谱带。