Abstract: 【Objective】To study the effects of appearance traits,yield and quality of commercial melons of Cucubita pepo L.under different growth regulators.【Methods】"Qianhu No.2"as the test materials,and the leaves of Cucubita pepo L. were sprayed with different growth regulators（4,5,6,10 mg/L Guafeng and 1 mg/L Qianshou）,and spraying water as a control,the effects of growth regulators on the appearance traits,yield and quality of commercial melons were analyzed,and the gray correlation method was used to analyze the correlation between each index and yield.【Results】The 1 mg/L Qianshou treatment significantly increased the single melon length and fruit transverse diameter of commercial melons of Cucubita pepo L.（P<0.01）;the number of melons per plant was lower than that of the control,and the yield decreased. Guafeng treatment had no significant effect on the single melon weight,single melon length and fruit transverse diameter of commercial melons of Cucubita pepo L.（P>0.05）,and the number of melons per plant was equal to or slightly increased compared to the control. 5 mg/L Guafeng treatment had the highest yield（67 242.9 kg/hm²）.The malformation rate of commercial melon under the treatment of growth regulator was 21.1%-77.8%,which was lower than that of the control.The gray correlation analysis showed that the correlation degree between each index and yield was as follows：the number of melons per plant>endogenous abscisic acid（ABA）>malformation rate> fruit transverse diameter>single melon length> single melon weight>fruit flesh thickness.【Conclusion】The use of growth regulators was beneficial to the development of commercial melons of Cucubita pepo L.;5 mg/L Guafeng treatment could reduce melons,increase fruit setting,and significantly increase yield.

Key words: Growth regulator, Cucubita pepo L., Commercial melons, Appearance traits, Yield, Quality, Correlation