| Abstract: In order to test the effect of ethephon on seed yield of different monoecious cucurbits, the gourd, bitter gourd, pumpkin and cucumber were used as materials to spray ethephon at 100, 150, 200, 250, 300 mg/L during the two periods of two leaves and one heart and three leaves and one heart. The results indicated that the appropriate concentration of ethephon could reduce the plant height significantly, decrease the node of the first female flower, increase the number of female flowers within 20 nodes effectively, and increase the flowering time of the first female flower, but had little effect on the seed number of single melon. When the concentration of ethephon was 150 mg/L of gourd, 200 mg/L of bitter gourd, 200 mg/L of pumpkin and 100 mg/L of cucumber, the effects of comprehensive yield increasing with four kinds of melon were the best. |