【摘要】 <正> 稻虱缨小蜂 Anagrus nilaparvatae 是褐稻虱 Nilaparvata lugens 卵期的重要天敌。褐虱缨小蜂与褐稻虱之间的相互作用,构成褐稻虱种群生命系统中的一个亚系统,在研究其数量控制中有必要分别进行研究。Lotka(1925),Volterra(1926),Thompson(1924)等首先提出了寄生者——寄主(或捕食者一猎物)模型。Nicholson(1933)和 Nicholson and Bailey(1935)进一步提出了寄生(捕食)作用函数的模式,为研究寄生者——寄主(或捕食者——猎物)的相互作用提供了一个基础。作为寄生者作用后的存活率,此函数可看成昆虫种群生更多还原

【Abstract】 The function f（N,P）=exp(-QP^1-m),risen from the model proposed by Hassell & Varley（1969）,includes a mutual interference constant m,describing the effect of interference on parasitoid attack ratt.This submodel is more applicable for describing the reaction between Anagrus nilaparvatae（Hymenoptera:Mymaridae）and Nilapar- vata lugens)Homoptera:Delphacidae)than Nicholson-Baley′s（1935）and Holliing′s（1959）.However,we changed the variable P into 100 P/N, and the found alternative equation more suitable for the description, because it can describe the searching efficiency depending on both of host density and parasitiod density. The simulation of the alternative equation shows an excellent idetity both in laboratory and in the field.The values of Q from laboratory and from the field are 0.2866 and 0.2862 respectively,and the values of m are 0.5563 and 0.5528 respectively.According to the figue on marginal stability from Hassell & May（1973）,The value of m of A.Nilaparvatae is possessed of the character of stability with damped oscillation.更多还原