摘要
本文详细介绍了甘南县主要甜菜病害。分析了病害发生的主要影响因子,指出了防治和减少病害发生的各项措施.甘南县主要甜菜病害:1、甜菜褐斑病.2、甜菜根腐病.影响根病的因素:1、轮作年份.2、整地及耕作形式.3、茬口.主要防治措施:选地势高的地块种值,以小麦、玉米为前作.避免大豆茬或大豆的迎茬;秋翻地,秋整地;深松;亩施五氯硝基苯2—3公斤;氮肥、磷肥各10—15公斤,硼酸0.5—1.0公斤.
The main diseases in Gannan county are introduced in detail.Themain factors affecting the diseases occurrence are analysed.The controllingtreatments are pointed.The main diseases in Gannan county are Cercospora leaf spot of beetand root rotThe main treatments for controlling diseases are1.Choosing higher field topography for sugarbeet growing.2.The preceding crop had better be wheat or Corn instead of Soybin orPotato since a lot of insects left in the soil where Soybin or Potatohad grown.3.The rotation system for sugarbeet should be little bit longer.At leastit should be 4-year rotation system4.The land making in Autumn will be helpful to increase organicmanure application5.Applying N and P fertilizers 10-15kg/mu respectively with boric acid0.5-1.0 kg/mu and quintozene 2-3kg/mu
