昆明大棚月季上西花蓟马种群动态与空间分布

Population Dynamics and Spatial Distribution of Western Flower Thrips Frankliniella occidentalis (Pergande) of Rose in Kunming

蓟马对昆明切花产业造成了很大危害,西花蓟马近年来已成为昆明切花上蓟马的优势种。本文对昆明市大棚切花月季不同的时间、不同生育期蓟马若虫、成虫及西花蓟马的种群数量进行了调查,西花蓟马数量随花朵开放增加,最多为花中期16头/朵,西花蓟马在蓟马中所占比例在大棚内6月份可达100%。运用聚集度指标测定、Iwao和Taylor幂法则方法进行检验,结果表明,蓟马成虫、若虫和西花蓟马成虫的空间分布格局均为聚集分布,且种群随其密度的升高分布越聚集;蓟马若虫聚集原因是由于昆虫本身的聚集行为,或由此行为与环境(如温度、湿度、寄主养分、杀虫剂施用频率等)共同作用所致,而西花蓟马成虫聚集行为则更多由环境因子造成。

Western flower thrips, Frankliniella occidentalis Pcrgande （Thysanoptera： Thripidae）, is a major pest of most greenhouse flower in Kunming, distorting flowers and leaves by feeding and transmitting to spovirnses. The Population amounts of western flower thrips was investigated in rose, the amounts of Frankliniella occidentalis was obvious discrepancy in the different time and procreate stage , the blooming stage was the most in June. The aggregate indexes and lwao-law were used to test the spatial pattern of adult of Franldiniella occidentalis in the fields . Each index showed that the spatial pattern of Frankliniella occidentalis in rose field was aggregate. The reason was their own behavior or the effect of the combination of the behavior and environmental disparate nature.