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根据曲江地区12年稻纵卷叶螟Cnaphalocrocis medinalis Guenée的历史虫情资料,挑选了31个代表性的发蛾高峰日,利用HYSPLIT轨迹分析平台对其迁飞峰次进行轨迹分析,结果表明:粤北稻区稻纵卷叶螟早期迁入虫源地主要分布在海南及两广南部稻区,其中5月大多分布在海南及雷州半岛,6月主要分布在两广南部稻区;夏季迁出虫源的降落地分布在长三角稻区及安徽稻区;秋季回迁虫源的虫源地主要分布在安徽南部及长三角稻区,少部分来自浙南及闽北;秋季迁出虫源的降落地主要集中在海南南部和越南北部稻区;随着时间的推移,其早期迁入虫源地的时空分布由南向北依次偏移,存在明显的季节性差异,而夏秋季迁出虫源降落地和秋季回迁虫源地的时空分布没有明显的季节性差异。本研究初步明确了粤北地区稻纵卷叶螟南北往返迁飞的虫源衔接关系。
According to the historical data of past 12 years of the Cnaphalocrocis medinalis Guenée in the Qujiang region, 31 representative moths were selected on the peak day, and their peak migration times were analyzed by using the HYSPLIT trajectory analysis platform. The results showed that: In the early stage of rice field in northern Guangdong, Cnaphalocrocis medinalis mainly migrated into Hainan and the southern rice and rice fields of Guangdong and Guangxi. Among them, May mainly distributed in Hainan and Leizhou Peninsula, mainly in southern rice and rice fields in June and June; The source of the landfall is located in the Yangtze River Delta and Anhui rice paddy areas; fall migratory source of insects are mainly distributed in southern Anhui and the Yangtze River Delta rice area, a small part from southern Zhejiang and northern Fujian; Mainly concentrated in southern Hainan and northern Vietnam. With the passage of time, the temporal and spatial distribution of the early migratory insects shifted from south to north in turn, with obvious seasonal differences. However, in summer and autumn migratory insects There was no obvious seasonal difference in the spatial and temporal distribution of landfalling and returning migratory insects in autumn. This study initially identified the northern part of North China rice leaf roller cross-migration of insects origin convergence.