基于特定温度的桔全爪螨生命表(英文)

Life Table of Panonychus citri McG with Particular Reference to Temperatures

本文建立了柑桔主要病害螨———桔全爪螨的实验种群生命表．该螨从卵到蛹期的死亡率在２０℃下为６５１％；在３０℃下为４３９％．其中，蛹的死亡率最高，在２０℃下为３３３％；而卵的死亡率在２５℃下最低，为６５％．在三个温度中，雌性性比均高于５０％，随着温度从２０℃升高到３０℃，其性别比从５７％上升到７５％．该螨的平均产卵量在２５℃下最高，为２４１枚；在２０℃和３０℃下，产卵量分别为１２７枚和２０枚．三个温度下的种群趋势指数均大于１，其中在２５℃达到最大，为１０５；在２０℃下最低，为３５２．对死亡率、性比、产卵量的综合分析表明，２０℃为桔全爪螨繁殖的最适温度．

A life table was developed for an experiment population of the citrus red mite,Panonychus citri McG,a serious pest of citrus trees in China.The total mortality rate from egg to nympha was the highest around 65.1% at 20℃,and 43.9% at 30℃.Of the various stages,nympha mortality rate was the highest,about 33.3% at 20℃,with egg mortality rate at 25℃ being the lowest around 6.5%.Female sex rates were much higher than 50% for all three temperatures,increasing from 57% to 75% with temperature from 20 to 30℃.The mean fecundity of 24.1 eggs at 25℃ was the highest,with 12.7 eggs at 20℃ and 20 eggs at 30℃.The trend indices for all three temperatures were clearly much higher than 1,of which the highest was 10.5 at 25℃,and the lowest 3.52 at 20℃.The result from the integrated analysis on fatality rate,sex rate and fecundity,indicated that 20℃ was the most suitable temperature for the citrus red mite propagation.