大棚西葫芦落花落果现象很严重，主要原因是植株营养生长与生殖生长养分分配矛盾所致。此外，雌花先于雄花开放，缺乏授粉或受精条件，无传粉媒介，低温伤害花器，后期高温、干旱等，均可引起落花落果。防止西葫芦落花落果，提高坐果率，增加产量，可采取以下措施：1．人工授粉 Greenhouse zucchini flowers fall and fall fruit is very serious, mainly due to vegetative growth and reproductive growth of nutrients caused by the conflict. In addition, female flowers first open in the male flowers, lack of pollination or fertilization conditions, no pollination, hypothermia Hua flower, late high temperature, drought, etc., can cause raindrops. To prevent the loss of fruit and vegetable peel, improve fruit set, increase output, can take the following measures: 1. Artificial pollination