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春季李树萌发新梢时,很容易受蚜虫危害,使新梢嫩叶卷曲,并黄化脱落,影响养分积累,造成大量落花落果,降低座果率,减少产量。必须及时喷药防治,以保护嫩梢,促进开花座果,增加产量,提高品质。防治技术措施:在李树春芽刚刚萌动时,幼叶刚刚展开和新梢即将转绿时,各喷洒一次1000倍氧化乐果水溶液,或3000倍蚜虱净水溶液,或1500倍农地乐水溶液,或2500倍净水溶液,均匀喷湿所有的枝叶,以开始有水珠往下滴为宜。喷药后四小时内遇雨,应重新补喷一次,以
Spring plum germination of new shoots, it is vulnerable to aphids, so that the tender tip of curly hair and yellow off, affecting the accumulation of nutrients, resulting in a large number of flowers and deciduous fruits, reducing fruit rate and reduce production. Spraying must be promptly controlled to protect young shoots, promote flowering fruit, increase yield, improve quality. Prevention and control measures: Li Shuchun bud just sprouting, the young leaves just started and the shoot is about to turn green, each spraying 1000 times omethoate, or 3000 times the water solution of imidacloprid, or 1500 times the farm water solution, or 2500 times the net water solution, evenly wet all the leaves, to start dropping drops appropriate. Within four hours after spraying the case of rain, should be re-fill spray once