2007-2012年佛冈县稻飞虱灯下发生期及种群数量动态分析

Population dynamics and occurrence period of Sogatella furcifera and Nilaparvata lugens based on the historic data analysis of light-trap catches from 2007 to 2012 in Fogang County,Guangdong Province

明确佛冈县稻飞虱灯下发生期及灯诱种群数量动态,对当地稻飞虱的预测预报和防治工作具有重要意义。根据佛冈县2007-2012年白背飞虱和褐飞虱的灯诱数据,分析了该县白背飞虱和褐飞虱的灯下始见日、终见日、发生期及灯诱量等。结果表明在佛冈地区,白背飞虱和褐飞虱混合发生;白背飞虱的灯下始见日集中在3月底至4月上旬,明显比褐飞虱早一个月,终见日均在10月下旬,差别不大;稻飞虱在早稻和晚稻期间均会出现大小不一的灯诱高峰,早稻期间白背飞虱高峰期集中在5月中旬至6月中旬,褐飞虱灯诱高峰期较迟,主要在7月中旬前后;晚稻期间白背飞虱高峰期大多在9月上旬至10月上旬,褐飞虱高峰期在10月份;早稻期间,白背飞虱的灯诱量占绝对优势,晚稻期间褐飞虱的灯诱量上升,与白背飞虱灯诱量基本持平。因此,佛冈县稻飞虱的灯下发生期及种群数量动态在一定程度上可反映当地稻飞虱的发生情况。

To clarify the population dynamics and occurrence period of WBPH（ Sogatella furcifera） and BPH（ Nilaparvata lugens） under light trap in Fogang County,Guangdong Province,plays an important role in the prediction and suppression of the pest in local rice cropping areas. In this paper,first occurrence date,last occurrence date,occurrence period and light-trap catches of WBPH and BPH were analyzed through the historic data of light-trap catches from 2007 to 2012 in Fogang. The results showed that S.furcifera and N. lugens occurred together in the rice cropping areas of Fogang. The first occurrence date of S. furcifera was concentrated from the end of March to early April,which was obviously one month ahead of that of N. lugens,and last occurrence date of S. furcifera and N. lugens were both in late October. There were two population peaks under light trap of S. furcifera and N. lugens during the period on early-season paddy field and late-season paddy field in one year. S. furcifera had two main density peaks which occurred from middle May to middle June during the period on early-season paddy field,while from early September to early October in late-season paddy field. N. lugens also had two main density peaks which occurred inmiddle July during the period on early-season paddy field,while in October during the period on late-season paddy field. The light-trap catches of S. furcifera were predominant during the period on early-season paddy field,while the light-trap catches of N. lugens increased during the period on late-season paddy field,which was almost equal to the light-trap catches of S. furcifera. Therefore,population dynamics and occurrence period of S. furcifera and N. lugens under light trap in Fogang were almost consistent with occurrence situation of rice planthoppers in local paddy fields.