山东省昌乐县供销社、县果品公司、县西瓜研究所等单位于1983年至1985年,以蜜室与富选2号和乐蜜与富选2号杂交,培育出乐优1号和乐优2号两个杂交种西瓜,于1985年通过省级鉴定并命名。这两个一代杂种西瓜具有明显的产量高、早热、抗枯萎病和耐贮运等优良综合性状,优于对照蜜室西瓜,有推广价值。特征特性乐优1号和乐优2号主要性状相似。生长势强,易座果,瓜个大,单瓜重一般10斤左右,乐优1号最大瓜16斤,乐优2号最大瓜18斤。瓜肉细脆,味甜多汁,纤维较少,可食率高,含糖度高,乐优1号和乐优2号平均瓜 Changle County, Shandong Province, supply and marketing cooperatives, county fruit companies, watermelon Institute and other units from 1983 to 1985, with the honey chamber and rich election 2 and honey and rich hybrid 2, breed Le Yue 1 and Leyou 2 two hybrids watermelon, in 1985 through the provincial identification and named. The two generation hybrids watermelon has obvious high yield, early heat, resistance to Fusarium wilt and storage and other excellent good traits, better than the control honey chamber watermelon, with the promotion of value. Characteristic characteristics Leyou 1 and Leyou 2 have the same main traits. Growing strong, easy to seat fruit, a large melon, melon weight generally about 10 pounds, the best melon on the 1st 16 pounds, Le Yu 2, the largest melon 18 pounds. Melon crisp, sweet and juicy, less fiber, high edible rate, high sugar content, Le Yu 1 and Le Yu 2 Average Melon