贵州南部水稻田白背飞虱种群数量动态与分析

Population dynamics of white-backed planthopper,Sogatella furcifera(Horváth)in rice field of south Guizhou,China

采用灯光诱集和田间系统调查的方法,对贵州南部三都县2008-2012年的白背飞虱灯下和田间种群进行了分析研究,结果显示:白背飞虱在4月中下旬开始迁入贵州南部,在5月中下旬到达迁入高峰;灯下主峰日与灯下始见日(r=0.996**)和始盛日(r=0.997**)均呈显著相关;灯下种群中雌虫数量略高于雄虫,年度间雌、雄性比差异不显著。若虫是田间种群的主要构成部分,在6月上旬达到发生高峰,其发生为害期较成虫短,一般到7月中下旬结束;成虫发生期贯穿水稻的整个生育期,在5月下旬至6月上旬出现高峰。田间主要为害世代的发生量与6月中下旬的灯下虫量呈显著正相关。

Light trapping and systematic field surveys of Sogatella furcifera（Horváth）（white-backed planthopper,WBPH）were conducted in Sandu County in southern Guizhou from2008 to 2012.Populations dynamic of WBPH both under lamp and in field were analyzed.The results showed that immigration of WBPH began in midto-late April and the peak of immigration appeared from middle-to-late May.Main peaking dates of light-trap catches were significantly correlated with first appearance date（r=0.996^＊＊）and initial outbreak date（r=0.997^＊＊）.The number of female was slightly higher than that of male,and there was no significant difference between years for the ratio of female and male.Nymphs which were the main components occurred shorter period than adults in field populations,and the number of nymphs arrived peak in early June and ended in mid-to-late July.Adults which occurred over whole growth period of rice achieved peak from late May to early June.The amount of the field main damage generation showed a significant positive correlation with the light trap catches in mid to late June.