柑桔锈螨实验种群的生态特性

ECOLOGICAL CHARACTERISTICS OF THE CITRUS RUST MITE, PHYLLOCOPTRUTA OLEIVORA (ASHM.)

本文对柑桔锈螨Phyllocoptruta oleivora(Ashm)(柑桔锈壁虱)实验种群的生态学特性进行研究,结果表明:温度、日照、营养条件对柑桔锈螨生长发育有很大影响。各螨态发育起点温度在13℃左右,世代发育积温为330.07日度,最适温度为23—32℃,最适日照长度为12±0.5小时。取食果实时对该螨生长发育和繁殖最有利,其次是当年生春梢。老叶及被害叶由于营养条件恶化,对其生长发育不利。文中还计算出该螨的种群增长趋势指数(Ⅰ)和内禀增殖力(r_m)。

The development and fecundity of the citrus rust mite, Phyllocotruta oleivora (Ashm.) in relation to temperature, photoperiod and nutrition were studied in the laboratory from 1984 to 1986. It was found that the thermal threshold and the thermal sum for development from egg to adult are.about 13℃ and 330.07 day degrees respectively, with favourable temperature ranging from 23° to 32℃ and critical photoperiod L12: D12. The citrus fruit seems to offer better nutrition for the growth of the mite than the spring tips of the citrus tree, and the aged or infested citrus leaves would lead to poor performance in its development. Based on the data from the rearing experiments the population trend 'I' and the innate capacity of population increase 'rm' of the mite are estimated.