广西地区芒果扁喙叶蝉的内禀增长率

INTRINSIC INCREASE RATE OF POPULATION OF MANGO LEAF——HOPPER IN GUANGXI

为了了解芒果扁喙叶蝉Idioscopus incertus(Baker)的内在增长速率,通过室内饲养,对芒果扁喙叶蝉实验种群的内禀增长率(r_m)进行了测定研究,并运用r_m值建立了芒果扁喙叶蝉种群抗干扰的反应时间模型,为研究该虫的种群动态和生物学特性提供了生态学依据。实验室平均温度和相对湿度分别为24.2℃和84％。实验结果如下: 内禀增长率:rm=0.07374/日净增殖率:Ro=61.7/代平均世代周期:T=55.9天反应时间模型:t=-13.5612 1n(1-M) 在这里M为种群死亡率本文的种群存活曲线接近于Pearl类型Ⅰ。

In order to understand the internal increase rate of mango leaf hopper (Idioscopus incertus Baker), the intrinsic increase rate (r_m) of population of the hopper was investigated through laboratory rearing during 1987. The values of r_m was used to build a response time model of anti-interference of the insect population, Which provided the basis for studies on the population dynamics and bionomics of the insect. The mean temperature and relative humidity of the laboratory were 24.2℃ and 84％ respectively. Our test results are as follows:Intrinsic increase rate: r_m=0.07374/dayNet reproduction rate: R_0=61.7/generationMean generation period: T=55.9 daysResponse time model: t=-13.5612 ln(1—M)Where M is the death rate of the population. The survival rate curve of the population given in the paper resembles pearl type Ⅰ.