(2) Seed melons are also called seed melons, melon seeds and melons. The fruit is round, medium or small, with soft pulp and poor sweetness, which is not suitable for raw eating. A single melon has many seeds, which are mainly used to produce melon seeds. Among them, seeds can be divided into red melon seeds and black melon seeds according to color, and can be divided into south species and north species according to distribution area. The former is resistant to moisture, easy to sit and small in fruit; The latter likes dry environment, sits far away from the fruit, and the fruit is large, which is suitable for cultivation in northwest China.
(3) Common watermelon is a common commercial watermelon, which is mainly used for raw food. Ordinary watermelons can be classified in the following ways. According to cultivation methods, it can be divided into fixed varieties and hybrid varieties. At present, the varieties are basically hybrid varieties and cannot be reused. According to fruit maturity, it can be divided into early-maturing varieties, middle-maturing varieties and late-maturing varieties. According to the fruit size, it can be divided into big fruit type, medium fruit type and small fruit type. According to the number of seeds in the fruit, it can be divided into seedless, seedless and common seedless watermelon varieties. According to the resistance to watermelon Fusarium wilt, it can be divided into continuous cropping resistant varieties and non-continuous cropping varieties. Watermelon can be divided into protected varieties and open varieties according to its adaptability to the environment. In addition, from the variety of colors, each variety can be divided into round fruit, long fruit, flower skin, green skin, red meat, yellow meat or white meat.