蚜虫是多种农作物上的主要害虫,每年都有不同程度的发生。多年来,在防治上,主要采用乐果、3911和甲胺磷等化学农药,虽然对治蚜防病,保产保丰起过重要作用,但它们高残留,污染环境,剧毒,对人畜不安 Aphids are major pests on many crops and occur to varying degrees every year. Over the years, mainly in the prevention and treatment, the main application of dimethoate, 3911 and methamidophos and other chemical pesticides, although aphids prevent disease, Paul Paul played an important role, but they are high residue, pollute the environment, highly toxic, disturbed