【摘要】 通过 4a的系统调查 ,发现瓢虫是棉田天敌的优势种群 ,瓢虫在棉田只有一个峰期。瓢虫与棉蚜有明显的追随关系 ,在不专门用农药防治棉蚜的情况下 ,瓢虫可基本控制棉蚜的危害更多还原

【Abstract】 The investigation indicated that the ladybug was a population of natural enemy with the advantage and there was a peak value of Ladybug growth in cotton field.There was a obvious indenpendent relationship between ladybug and aphid and the ladybug may control the damage of aphid in the cotton field without the use of chemicals.更多还原