中宁枸杞蚜虫种群动态变化及迁飞个例模拟OA

The migration behavior and population distribution of wolfberry aphids exhibit obvious seasonal variation characteristics,which are closely related to the atmospheric circulation patterns and local weather conditions.Based on the field observation data in the wolfberry planting area of Zhongning,Ningxia from 2022 to 2024,combined with the WRF-FLEXPART numerical simulation method,this paper comprehensively analyzed the population dynamics and migration characteristics of wolfberry aphids.The results showed that the late June to July was the outbreak peak period of wolfberry aphids in this area.The population growth was closely related to the warm(20-30℃)and humid(60%～80%relative humidity)meteorological conditions,while the heavy precipitation process had an obvious inhibitory effect on the population increase.The high-resolution simulation of the typical migration process from July 12 to 15,2024 further indicated that the migration paths of aphids mainly originated from the northwest and north directions,and their potential source areas could be traced back to the area from Baiyin to Lanzhou in central Gansu Province.The analysis of migration mechanism revealed a composite pattern of"short-term dominance of local aphid sources and supplementary influence of exogenous aphid sources".Specifically,the short-distance diffusion within 24 h was mainly driven by local aphid sources,while the airflow from the north direction undertook the function of transporting exogenous aphid sources at medium distances.The research conclusions can provide a scientific basis for the precise early warning of wolfberry aphids and the formulation of cross-regional collaborative prevention and control strategies.