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根据灯诱虫情,运用大气质点轨迹分析平台HYSPLIT4.8对1991-2012年四川省叙永县白背飞虱主要迁入高峰日进行轨迹模拟,并运用气象图形处理软件Grads对白背飞虱主要迁入高峰日进行气象背景分析。结果表明,四川叙永白背飞虱主要在5-7月迁入。5月份,白背飞虱迁入峰次较少,虫源主要来自云南西南部,云南中部地区、缅甸北部和越南北部也可提供部分虫源;6月份和7月份,叙永上空偏南气流频次逐渐增多,白背飞虱迁入峰次也相对增加。6月份虫源主要来自云南东部和南部地区,广西西北部、缅甸北部以及云南中部地区也能够提供少量的虫源;7月份虫源主要来自云南东北部、贵州西南部和云贵交界处,另外,云南中部和广西西北部也可提供部分虫源。降水、气流的垂直运动和风向切变是造成白背飞虱在叙永大规模集中降落的主要气象因子。
According to the situation of light trap, using the trajectory analysis platform HYSPLIT4.8 of atmospheric particle trajectory simulation, the trajectory of main white-backed planthopper Sogatella furcifera migrated from 1991 to 2012 in Xuyong County, Sichuan Province was simulated and the phytoplankton Mainly moved into the peak day for meteorological background analysis. The results showed that the white-backed planthopper Siphonaptera in Sichuan was mainly moved from May to July. In May, the number of whitebacked planthoppers migrated less frequently. The source of insects mainly came from southwestern Yunnan, central Yunnan, northern Myanmar and northern Vietnam. Some insects were also found in May. In June and July, Frequency gradually increased, whitebacked planthopper moved to the peak relative increase. In June, the source of the insects mainly came from the eastern and southern parts of Yunnan. The source of insects also provided a small amount of insect sources in the northwestern part of Guangxi, northern part of Myanmar and central Yunnan. The insect sources in July mainly came from the northeast of Yunnan, the southwest of Guizhou and the junction of Yunnan and Guizhou, Some pests may also be provided in central Yunnan and northwestern Guangxi. Precipitation, vertical movement of airflow and wind shear are the main meteorological factors that cause the large-scale concentration of white-backed planthopper in Xuyong.