贵州褐飞虱区域性发生规律比较研究

The Comparative Research of Regional Occurrence of the Brown Planthopper,Nilaparvata lugens (Stl) in Guizhou Province

为明确贵州省褐飞虱全年世代尤其是主害代发生的为害规律,采用灯光诱测和田间系统调查方法,于2009～2011年对贵州6个县不同海拔和地貌条件下的褐飞虱区域性发生规律进行了系统的比较研究。结果表明,褐飞虱在三都、惠水、锦屏、思南始见日多在每年的4月下旬至5月上旬,而道真和盘县在5月下旬至7月中旬。褐飞虱在贵州可发生5～8代,各稻区灯诱数量的年度间变化大,田间褐飞虱初见于6月中旬,盘县、惠水等地稍迟,在田间一般发生2～3个世代,世代重叠明显,第4代和第5代盛发为害,世代高峰分别在7月10～20日,8月10～20日,一般在8月上旬,田间虫量达到最大。不同稻区不同年份间各虫态比例变化较大,区域性发生规律差别明显。贵州地形、海拔、温差和多种水稻生育期并存等是影响贵州褐飞虱区域性发生规律的主要因素。

In order to clarify occurrences of annual generations of Nilaparvata lugens Stal in Guizhou Province, the population dynamics were systematically studied using light traps and systematic field surveys in six counties, Panxian, Huishui, Sandu Shui Autonomous County （ Sandu in short）, Jinping, Sinan, Daozhen Gelao and Miao Autonomous （Daozhen in short） from 2009 to 2011. The results showed that the initial immigration period of N. lugens usually were in late April to early May in Sandu, Huishui, Jinping, Sinan , but in late May to the middle of July in Daozhen and Panxian. N. lugens has occured 5 - 8 generations throughout the year in Guizhou, but the trapped amount of N. lugens varied interannually. In the paddy field, it has 2 - 3 overlapping generations in a year and the first adults appeared in the middle of June or later in Panxian and Huishui. The 4th and 5th generations of N. lugens were the major damage generations, the peaks occurred in the July 10 -20 and August 10 -20 respectively, and the field maximum amount usually in early August. The results proposed that topography, altitude, temperature and diversity of rice development are main influencing factors on the regional occurrence pattern of N. lugens in Guizhou Province.