When cucumber plants grow more than 4 true leaves and melon vines grow about 300 to 400 mm, plant growth regulator ethephon 200 to 500 PPM (diluted), or 5 to 10 g of nicotinic acid per mu, can be used. 5 to 10 grams of alkanol, or 10 grams of propagule (optionally one of the above plant growth regulators), then add 50 to 70 kilograms of water and spray it evenly one or two times in the cucumber field to promote cucumber plants. The normal division of the cells enhances the ability of the male and female flowers to grow in the same plant, effectively solving the problem of infertility caused by the cucumber opening only the male flower. The above method adapts in the same way as the shelter.
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