DIFFERENTIAL RESPONSE OF CHEMICALS ON SEX MODIFICATION OF THREE GENERA OF CUCURBITS
It was observed that Ethrel at 50 and 100 ppm induced the first pistillate flower earlier and at lower nodes both in cucumber and bottle gourd, whereas, in watermelon, it delayed the appearance of female flowers as compared to the control. GA 5 ppm and Boron 2 ppm proved to be the best for early induction of female flowers in watermelon. Ethrel 50 ppm, Ethrel 100 ppm and Boron 2 ppm produced the lowest sex-ratio in cucumber, bottle gourd and watermelon, respectively.
It is evident that the action of sex modifying chemicals differs in the genus Citrullus from that in Cucumis and Lagenaria.