【摘要】 根据田间稻飞虱和天敌优势种群数量的调查数据,运用天敌功能指数法评估其相关性,结果表明:当益害比E/P>1时,EF值随害虫和天敌数量增加而极剧增长(指数型增长),而益害比0.01<E/P<1时,EF值随害虫和天敌数量增加而增长幅度减慢,特别是益害比0.001<E/P<0.01,EF值出现水平波动曲线,但无论是哪一种动态,均表现出EF值与害虫和天敌数量间呈正相关关系。更多还原

【Abstract】 Based on amount investigation of rice planthopper and the advantage population of natural enemies, the correlation was evaluated by index method of the natural enemies function. The results showed that EF value sharp increasing with rise of pest insect and natural enemy number (exponential increase) while beneficial insect/pest inset as E/P>1, but EF value increasing scope becoming slow especially beneficial insect/pest inset as 0.001<E/P<0.01. The EF value are horizontal fluctuation curve. There are positive correlation of EF value between pest insect and natural enemy number whether a dynamic.更多还原