主要气象因子对枣树截形叶螨种群数量变动的影响

摘要

于2012年6月至8月份对阿克苏市枣棉间作园内截形叶螨种群数量动态进行了监测,并将主要气象因子对截形叶螨种群数量动态的影响进行了系统分析.结果表明,5月至6月截形叶螨种群处于缓慢增长态势,7月份以后种群数量急剧上升,7月中旬至8月上旬达到种群数量的高峰期,8月下旬种群数量迅速下降.逐步回归分析表明,平均温度、最高温度、最低温度、空气相对湿度、日照时数是影响枣树截形叶螨种群变动的主要气象因子.通径分析和决策系统分析表明,平均温度和日照时数对种群数量变动具有正效应,是直接影响截形叶螨种群变动的重要指标.阿克苏7月至8月份平均温度和平均相对湿度有利于截形叶螨生长发育,故该时期截形叶螨在阿克苏枣树上的发生也最为猖獗.%The population dynamics of Tetranychus truncatus Ehara in Aksu Zizyphus jujube and cotton intercropping parks has been monitored from June to August in 2012,and the systematic analysis of the effects of the main meteorological factors on the population dynamics of Zizyphus jujube Tetranychus truncatus Ehara has been made.The results showed that the population of Tetranychus truncatus Ehara grows slowly from May to June,rises sharply in July,reaches the peak from second ten-day of July to first ten-day of August and declines rapidly in the third ten-day of August.The regression analysis indicated that the average temperature,maximum and minimum temperature,relative air humidity and sunshine hours are the main meteorological factors affecting the population fluctuation of Zizyphus jujube Tetranychus truncatus Ehara.The path analysis and decision-making system's analysis made it clear that the average temperature and sunshine hours have a positive effect on population fluctuation,which is an important indicator of the population fluctuation of Zizyphus jujube Tetranychus truncatus Ehara.The average temperature and relative humidity in Aksu during July and August are conducive to the growth and development of Tetranychus truncatus Ehara,and therefore Tetranychus truncates Ehara is the most rampant during this time.