豫西瓜９号（原名开杂１２）是开封市农林科学研究所选育的中晚熟、高产、优质、耐运型西瓜新品种。１９９９年４月通过河南省农作物品种审定委员会审定，并命名。１　特征特性１．１　特征　豫西瓜９号属中晚熟品种，全生育期１０６天，果实发育期３３天左右。单瓜重７ｋｇ以 Yu watermelon 9 (formerly open hybrid 12) Kaifeng City Institute of Agriculture and Forestry Science and Technology breeding late-maturing, high yield, high quality, resistant to transport new varieties of watermelon. In April 1999 through the Henan Province Crop Variety Approval Committee validation, and named. 1 Characteristic characteristics 1.1 Characteristics Yu watermelon 9 is a middle-late maturing varieties, the whole growth period of 106 days, the fruit development period of about 33 days. Single melon weight 7kg