1. Chemical increment method. When the cucumber grows 1-3 true leaves, the flower buds in the leaf axils of sections 2-21 are successively differentiated, but it is not yet decided whether it is a female flower or a male flower. At this time, spraying ethephon is the best time. The concentration of spraying ethephon is generally 100-200 mg/L. If sprayed twice, the effect is 200 mg/liter; if sprayed three times, the effect is 100 mg/liter, spray 1-2 times. When spraying, use a sprayer to spray the front and back of the leaves at 4 pm on a sunny day. 2. Shade controls the light. Cucumbers are short-day crops, and artificially shortening the light can increase the number of female flowers. Before the cucumber flower is formed, it is covered with a black shading net with a low shading rate such as black SZW-10 in summer, which can reduce the average daily temperature of the cultivation bed by 1.4 ℃, the average ground temperature of 5 cm by 2.1 ℃, and the average light intensity. 66.2%, control the daily sunshine hours within 9 hours. 3. Increase water and nitrogen fertilizer. Cucumbers grown in soil with 80% humidity are more than double the yield when grown in soil with 40% humidity. It should be ensured that cucumbers have sufficient water conditions, and water should be irrigated in time to maintain a moist environment. In the early growth and development of cucumber, if sufficient nitrogen fertilizer is guaranteed, the differentiation of female flowers can also be increased. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone Losing Weight Plant Extract,Senna Leaf Extract,Bulk Senna Leaf Extract,Senna Leaf Extract Powder Youth Biotech CO,. Ltd. , https://www.youtherb.com