【摘要】 为明确贵州三都喀斯特褐飞虱主害代的发生规律,2009—2011年采用灯光诱测和田间系统调查方法对该地区一季中稻区的褐飞虱种群消长动态进行了系统研究。结果表明,各迁入代灯下诱捕虫量和田间虫量在不同年份间存在差异,2009年单日最大诱虫量达6688头,分别是2010年和2011年的15.3倍和2.5倍。2009、2010、2011年预测圃虫量高峰分别为10777、4630、1615头/百丛,但主害代均为第4代和第5代,始见日与主迁入峰日呈显著相关。不同年份、不同移栽期稻田第4代、5代褐飞虱各虫态发生程度不同,2010、2011年褐飞虱若虫高峰日集中在7月下旬至8月上旬,晚栽稻田成虫、若虫的发生高峰日均迟于早栽类型田;早、晚栽时间差异形成的水稻不同生育期并存,利于褐飞虱栖居、繁殖。天敌蜘蛛、黑肩绿盲蝽与褐飞虱的种群消长具有同步性,但其自然控制作用不足以控制褐飞虱危害。更多还原

【Abstract】 In order to clarify occurrences of annual generations of Nilaparvata lugens(Stl) in Sandu Shui Autonomous County(Sandu for short),Guizhou Province,a Karst single cropping medium rice region,the population dynamics of N.lugens were systematically studied using the methods of light traps and systematic field surveys from 2009 to 2011.The results showed that the light trap catches,the trapped amount of immigration generations,and the actual population of N.lugens were different among three years.The light-trap catches of the primary-peak amounted to 6688 in 2009,which were 15.3 and 2.5 times in 2010 and 2011,respectively.The peak in the early transplanting check fields in 2009,2010 and 2011 were 10777,4630,1615 head /100 hills,respectively.The 4th and 5th generations of N.lugens were the major damage generations in single cropping medium rice,and the initial immigration period was significantly related with primary-peak period.The occurrence degree of adults and nymphs of N.lugens varied with year and transplanting times,and the peak day of N.lugens nymphs were from the late July to the early August in 2010 and 2011.The occurrence peaks in the late transplanting paddy field were later than that in the early one.Meanwhile,the coexisted different development stages of the rice,due to time differences of transplanting,were conducive to inhabitation and reproduction of N.lugens.The population dynamics of spiders and Cyrtohinus lividipennis well synchronied with that of N.lugens,but predatory capacity of the spiders and C.lividipennis was not enough to control N.lugens.更多还原