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What kind of watermelon with yellow flesh is it?
Huangmang watermelon, called Tiancheng, is an early-maturing watermelon variety selected by Vegetable Research Institute of Zhejiang Academy of Agricultural Sciences. The female parent is an inbred line obtained from watermelon germplasm PI370429 and Jiahe, which is separated from the offspring, selfed for many generations and cultivated directionally.

Tiancheng's whole growth period is 95 days, the fruit growth and development period is 30 days, and the single fruit weighs 2.2kg. The fruit is short oval, with a green peel with narrow dark green teeth, waxy powder on the surface of the peel, no wrinkles and orange pulp.

In Zhejiang Province, China, it can be cultivated in greenhouse and open field. In Hangzhou, it is usually planted in early February, early March and open field in summer. Sowing time is from June to August, and sowing can be carried out in July and August. If it is in a protected field, it is necessary to artificially assist pollination in order to better improve the fruit setting rate. It is rich in lutein, fructose, glucose, malic acid and nutrients such as calcium, phosphorus, iron and potassium.

Diseases of yellow pulp watermelon

Phytophthora blight is one of the main diseases of watermelon, which occurs in all watermelon producing areas and mainly harms leaves, stems and vines. When the leaves are infected, dark green water spots will appear, which are round or irregular. When the humidity is high, the leaves rot or burn like boiling water.

When the stem base and petiole are infected, dark green spots will appear in the water, soft tissue rot will occur when the humidity is high, and grayish brown dry rot tissue will appear when it is dry. The suitable temperature for onset is 20-30 degrees. Pathogen spreads with airflow, rain or irrigation water, and it is easy to get sick when plants are dense, humid and poorly ventilated.

Stem blight, also known as yellow water disease, mainly harms stems, vines, leaves and petioles. The onset of leaf diseases mostly starts from the leaf edge, and round or oval brown spots will be formed on the leaves. Infected vines will produce waterlogging spots near the stem nodes, and the vines will gradually crack. In severe cases, yellow-brown mucus will flow from the diseased part, which will form a deep red jelly shape after drying, and then the vines will gradually wither.