Doujiao flower drop in addition to control the temperature, flower drop there are many factors to deal with. 1---- to control thrips and mites and pod borers. 2----Flowering period ground can not be too wet, dry flowers and wet pods. 3---- appeared seedling prosperous also drop flowers, to control the amount of nitrogen fertilizer, increase the application of phosphorus and potassium. 4----- suggest foliar treatment with potassium dihydrogen phosphate + boron and molybdenum fertilizer spray, 7-8 days once, 2 consecutive hits, to promote flower bud differentiation, and improve the seat of the pod.