Variety Name: Black Whirlwind Approved Code: Yusen Watermelon 2009009 Breeding Unit: Wang Jingxing Zhu Jie Mao Dan Variety source: You Department No. 19 Resistance Series No. 45 Characteristics: It is a late-maturing variety, with 105 days of growth and 31 days of fruit development. The plants grow steadily and have moderate branching. The main vines are 280 cm long, the main stems are 0.85 cm thick and the internodes are 6.5 cm. The first female flower has 7 nodes in the joint and the female flower has 7 sections; the fruit is elliptic and the fruit type index is 1.3; the pericarp is black, the skin is 1.1 cm thick, and the single fruit weight is 5-6. Kg; red, red, crisp and juicy, with less fiber, good taste and taste; medium-sized seeds, brown, average 250 melons, 1000-grain weight 59g. Identification of resistance: In 2007, the Biotechnology Center of Zhengzhou Fruit Research Institute of the Chinese Academy of Agricultural Sciences identified the artificial rubbing inoculation at seedling stage: flu virus disease (grade 3.75). Field survey in 2008: Resistance to wilt. Quality analysis: In 2008, the Ministry of Agriculture Quality Supervision, Inspection and Test Center (Zhengzhou) tested: Center sugar 12.19%, edge sugar 9.94%. Production performance: Regional trials in late-maturing provinces in 2007 with an average yield of 2657.9 mu Kg, an increase of 9.9% over the control of Qingfa No. 8; in 2008, the trial continued, and the average yield was 3241.1 kg, which was 14.51% higher than the control Qingfa No. 8. In 2008, the middle and late mature production trials in the province had an average yield of 3202.5 kg/mu, which was 7.6% higher than the control Qingfa No. 8. Appropriate area: Middle and late ripe watermelon cultivation in the province. Cultivation Techniques: 1, sowing date: film cultivation in mid-March, nursery, seedling age about 30 days, spring exposed in early April seedlings. 2, density: 650 strains / mu, double vine or triple vine pruning. Select the second or third female flowers. 3, field management: Apply enough base fertilizer, saturate the bottom water, sit fruit and fertilizer supply is sufficient, stop harvesting 7 days before harvest, heavy wolfberry planting needs to be grafted, pay attention to the prevention and control of aphids, virus disease, wilt disease. Knapsack Sprayer,Backpack Pump Sprayer,Backpack Pressure Sprayer,Commercial Backpack Sprayer Henan Qianli Machinery Co.,Ltd. , https://www.chalionagri.com