番茄叶片上美洲斑潜蝇幼虫种群密度的零频率估计法

为了在一定精度保证的前提下，简便、快捷地估计番茄叶片上美洲斑潜蝇田间发生情况，本文基于番茄叶片上美洲斑潜蝇幼虫种群发生的田间调查数据，用种群密度m和零频率p0分别拟合Gerrard Chiang模型、线性函数、二次函数、双曲函数、指数函数、幂函数和对数函数7种不同模型。结果表明，以Gerrard Chiang模型m=1.322 5×(-ln p0)1.075 9为最优（理论抽样数187.3叶），用其可根据零频率有效地估计番茄叶片上美洲斑潜蝇幼虫种群密度。

Estimation of the larval population density of Liriomyza sativae on tomato leaves by zero frequency method

Gerrard Chiang model, and the models of linearity, quadratic, inverse, exponential, power and logarithm were fitted with the larval population density m and the zero frequency p0 of Liriomyza sativae Blanchard on tomato leaves, based on the data from binomial sampling. Gerrard Chiang model, m=1.322 5×(-ln p0)-1.075 9, of which the necessary sample size is 187.3 leaves, appeared to be the optimum one and could be used to estimate the larval population density effectively by the zero frequency on tomato leaves.