近期,很多种植大葱的农户反映大葱叶部出现干尖、白点、曲线状白道等症状。经田间查看初步诊断干尖为大葱疫病,白点是葱蓟马为害所致,曲线状白道是葱斑潜蝇为害所致。建议广大葱农抓紧防治,以免造成严重减产。下面就大葱主要病虫害及防治措施简单谈一下。大葱主要病害有霜霉病、紫斑病、灰霉病、疫病等;主要虫害有葱地种蝇、葱斑潜蝇、葱蓟马等。一、霜霉病。主要危害大葱的叶及花梗。一般地势低洼、排水不良、重茬地发病重,阴凉多雨或 Recently, many farmers planting green onions reflect the emergence of dried green onions, white spots, curved white road and other symptoms. After the field to see the initial diagnosis of dried onions for the disease, the white spot is caused by Thrips tabaci, curvilinear white road is caused by green leaf miner damage. It is recommended that the majority of onion farmers pay close attention to prevention and treatment, so as to avoid serious production cuts. The following main onions and pests control measures briefly. The main diseases of green onions are downy mildew, purple spot, gray mold, blight, etc .; the main pests have all kinds of fly, onion leaf miner, onion thrips and so on. First, downy mildew. Major damage to green leaves and pedicel. General low-lying, poor drainage, heavy crop stubble, cool and rainy