为大力推广有机旱作条件下主要粮果病虫害绿色生态植保技术的集成应用,山西省通过建立示范基地和优化集成运用整套具有山西特色的生态植保绿色防控技术体系等措施,为绿色生态植保技术集成创新平台的创建打下了坚实的基础,强有力推动山西省有机旱作农业的高质量发展.

【Objective】To provide supports for improving the monitoring and warning level of the beet webworm, Loxostege sticticalis, the seasonal spatiotemporal distribution in Northern China, the sources and relationship between L. sticticalis in North and Northeast China, within and outside China were studied in 2020.【Method】The searchlight traps were assembled to daily monitoring in Beijing, Tianjin, Hebei, Liaoning, Shanxi and Inner Mongolia. Based on the monitoring data of searchlight traps at the plant protection stations in the 6 provinces (municipality, Autonomous Region), the population fluctuations and migration pattern of L. sticticalis in Northern China were analyzed by using GrADS and R. The FNL data were processed by GrADS software, to obtain wind field information and draw the map. A three-dimensional particle trajectory analysis program based on WRF model was used to simulate the migration route of L. sticticalis, and the trajectory simulation results were plotted by ggplot2 3.3.0 package of R3.8.【Result】The overwintering generation of L. sticticalis adults mainly occurred in Shanxi, Hebei and Inner Mongolia, and a large number of adults of the 1st generation were found in Huade of Inner Mongolia and Kangbao of Hebei in 2020. During the typical migration period, North China and Northeast China were affected by frontal and cyclonic processes. The southward or southwest low-level jet at the front of the northeast cyclone provided favorable conditions for the long-distance migration of L. sticticalis into the northeast region, but the northwest airflow at the back of it blocked the migration path. The results showed that most of the overwintering adults stayed in North China and some of them migrated to Northeast China and the border of China, Mongolia and Russia with the help of southwest airflow. In late May, the main source in Hinggan League of Inner Mongolia came from the overwintering area of L. sticticalis in North China. In early June, part of them came from the overwintering area of North China, part of them came from the junction of China, Mongolia and Russia. In late June, the main source came from North China. The adults of the 1st generation of L. sticticalis mainly came from the 1st generation larva occurrence areas in central and western Inner Mongolia and the border between China and Mongolia. Affected by the frontal weather, they gathered and landed in Huade of Inner Mongolia and Kangbao of Hebei, and further migrated to the northeast.【Conclusion】2020 is a typical year of outbreak since the population of L. sticticalis has risen again in 2018. Strong air currents are important reasons for its successful migration, the convergence of wind shear and cyclone center causes the migrating adults to gather and land in large area, resulting in a sudden increase of local insect population. Both the overwintering generation and the 1st generation of L. sticticalis in North China and Northeast China were closely related to the foreign sources. It is of great significance to carry out the regional monitoring and prediction and forecasting in advance for L. sticticalis.

小麦条锈病是长期影响我国小麦生产安全的流行性病害.从2017年临汾市发现小麦条锈病以后,小麦条锈病在临汾市发病周期变短,对小麦生产造成的威胁不容小觑.通过实际调查小麦条锈病近几年在临汾市的发生情况,通过查阅资料,结合气象、种植条件等因素,分析小麦条锈病在临汾市发生特点,发生原因,并提出防治建议.

玉米黏虫是当前玉米生产中主要的暴发性害虫之一,大发生时可以将大片作物吃成光杆,造成减产或者绝收,严重影响了玉米的品质和产量.因此,摸清临汾市玉米黏虫的发生规律,积极做好虫情监测工作,对指导农民防治具有十分重要的作用.本文作者通过数十年对玉米黏虫发生情况的调查,总结了其在临汾市的发生规律,并结合气象条件、 大田环境等因素综合分析发生原因,提出防治意见,供大家参考.

近几年玉米红蜘蛛在临汾地区玉米田呈逐年加重态势,文章总结了近几年临汾市玉米红蜘蛛发生规律、发生特点、重发年份增多原因,并提出玉米红蜘蛛综合防治技术.

根据雌蛾卵巢发育级别数据,对山西省黏虫常发区虫源地进行分析,并结合2012-2018年相关监测站点各代次诱蛾量数据初步推断不同地区间虫量相关性.结果 表明,越冬代北迁黏虫在山西省分别形成南部、中部和北部3个滞留区域.通过构建一元线性回归方程进行分析,芮城1代蛾量与昔阳、白泉、汾阳l代蛾量极显著相关;王郭1代蛾量与汾阳1代蛾量、王郭2代蛾量与白泉2代蛾量呈显著相关.由此推测,山西省内1、2代黏虫的主要虫源地为芮城、王郭.

农田杂草是危害农业安全生产的主要因素之一,文章通过在大禹乡选取玉米田样地,采用侧置“W”九点取样法,结果显示,大禹乡的杂草共有14科21种,其优势种分别为藜、凹头苋、苦买菜、打碗花、马塘,亚优势种为狗尾草、田旋花、车前.并根据大禹乡玉米田杂草优势种群,推荐采用40％乙·阿合剂悬浮剂播后苗前均匀喷雾处理土壤.