To prevent cucumbers from having flowers and no melons, it is necessary to strictly control the growth of melons and vines, and to ensure that the growth of the plants is coarse and strong, so as to enhance the ability of the cucumber plants to "external branches" and the female and male flowers. The specific method is as follows: when the cucumber plant grows more than 4 true leaves and the melon grows 30 to 40 cm long, the plant growth regulator is used to dilute three parts of the ethephon, or naphthalene acetic acid, thirty 5 to 10 grams of alkanol, or 10 grams of auxin (optional one of the above agents), then 50 to 70 kg of water and mix well, spray evenly on the cucumber plants 1 or 2 times.
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