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蚜虫,是世界性的作物害虫之一。它们身体虽然微小,但对作物的危害却十分严重。它们聚集在植物的嫩枝柔叶上,贪婪地吸取其汁液,使植物生长停滞、叶片皱缩、卷曲,严重时可使植物枯萎。它们的繁殖能力令人十分惊奇。一位昆虫学家曾根据实际观察后作过一次计算:一只棉蚜孵化后五天即开始产卵,平均每天产3个,连产20天。一年中,棉蚜可发生30代,总生殖天数约150天,按累进生殖计算,早春第一次孵化的一只雌蚜和它所繁殖的后代,在150天的生殖期中,所繁殖
Aphids, one of the world’s crop pests. Although their bodies are small, the damage to the crops is very serious. They gather in the tender leaves of young plants, greedy to absorb their juice, the growth of plants stagnated, leaf folds, curly, serious plants can wilt. Their reproductive capacity is very surprising. An entomologist once calculated according to the actual observation: one cotton spider egg begins to lay eggs five days after hatching, with an average of 3 per day, with a continuous production of 20 days. A year of cotton aphid can occur 30 generations, the total number of reproductive days of about 150 days, according to progressive reproduction, the first hatch in early spring a female aphid and its progeny, reproductive in 150 days of breeding