柑桔品种对桔全爪螨自然种群动态的影响

EFFECTS OF THREE CITRUSVARIETIES ON POPULATION DYNAMICS OF CITRUS RED MITE

本文采用生命表方法，研究了３个常见柑桔品种（尾张、贵农早和锦橙）对桔全爪螨种群动态的影响。结果表明，３品种对桔全爪螨产卵量没有显著的影响；在夏末，桔全爪螨存活率以在品种锦橙上为最高（０．７１６４），在尾张上次之（Ｏ．１４７４），而以在贵农早上为最低（０．０６４０）。桔全爪螨自然种群净增殖率（Ｒｏ）在品种贵农早、尾张和锦橙上分别为０．２４８７、０．２８３５和０．６０４２，说明品种间对桔全爪螨种群数量的影响有明显的差异。

This paper deals with the effects of three citrus varieties,“Guilonzao”,“Weizhang”and“Jingchen”on the population dynamics of citrus red mite,Panonychus citri McGregor in the light of the methods of life table in Qingzhen,Guizhou province.The developmental duration and the fecundity of the mite wereundifferentiated in the varieties,but;significant differences appeared in survivalrates.In the stage of larva,the survival rates were 0.3017,0.3913and0.4872;.3779,0.5701and0.5856 in the stage of nymph;and the survial rates per day in the stage of adult were 0.8207,0.8004 and 0.8404 in the varieties“Guilongzao”,Weizhang”and“Jinchen”respectively.The intrinsic capaci-ty of increase rates(r)were-.0602,-0.0569 and-0.0224 on the three varie-ties respectively in July to August.The results showed that the variety“Guilongzao”was more resistant tocitrus red mite than the others.