The Haemocytes of Nondiapause and Diapause Larvae and Pupae of the Pink Bollworm1

Abstract

Total counts of the haemocytes of nondiapause and diapause larvae and pupae of the pink bollworm (Pectinophora gossypiella (Saund.) ) showed no significant differences between the three groups—averaging 18,962 cells/cu. mm. in the fourth-instar larvae and 22,174 in the pupae. The differential counts showed no differences between the sexes within each of the three groups, but distinct differences between the stages—the proleucocytoids and plamatocytes being lower and the spheroidocytes and cystocytes higher in the diapause larvae. No podocytes or vermiform cells were found.