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落花落果的原因1.低温冻害引起落花。东部个别地区末霜期出现在5月中旬,冷气团造成生理性冷害,造成部分花芽脱落。2.除草剂飘移造成落花。大田除草剂多在4月末5月初使用,此时正是五味子开花期。除草剂的飘移直接为害五味子花瓣,使雌花不能正常受粉造成落花。3.病虫害造成落果。病害主要有根腐病、叶枯病、白粉病,发病严重时造成落果;虫害主要有卷叶虫、泡沫蝉、天幕虫等,在5~8月份均有发生,严重时直接为害果实。
Reasons for falling flowers 1. Low temperature frost damage caused by falling flowers. In the eastern part of the end of the frost period appears in mid-May, cold air mass caused physiological chills, resulting in some flower buds off. Herbicide drift caused by falling flowers. Field herbicides and more in late April and early May to use, this time is the Schisandra flowering. Drift herbicides directly harmful Schisandra petals, so that female flowers can not be normal caused by powder falling. Pests and diseases caused by the fall. Diseases are mainly root rot, leaf blight, powdery mildew, serious disease caused by the fall; pests main leaf roller insects, foam cicadas, celestial beetles and so on, have occurred in May to August, serious direct damage to the fruit.