How should bolting (flower-topping) in greenhouse cucumbers be prevented?

    1. Loosen the soil in time to raise the soil temperature, promote root development, and induce new roots. 2. Manage fertilizer and water reasonably, water and topdress in good time, promote the vegetative growth of stems and leaves, and prevent flower-topping. 3. After flower-topping occurs, remove the excess young fruits. 4. Spray plant growth regulators such as Tianda 2116 and Plant Golden Element  (compound gibberellin) to promote the growth of stems and leaves and break the flower-topping condition.