“红花大金元”烤烟叶枯病发生原因分析  

Causal Analyses of Leaf Blight of Tobacco Variety "Honghuadajinyuan"

作　　者：杨绍聪[1] 段永华[1] 张艳军[1] 吕艳玲[1] 陆松柏 孙钺 陆星星 

机构地区：[1]云南省玉溪市农业科学研究所,云南玉溪653100 [2]云南省玉溪市植保植检站,云南玉溪653100 [3]云南省玉溪农业职业技术学院,云南玉溪653100

出　　处：《云南农业大学学报（自然科学版）》2008年第5期613-620,共8页Journal of Yunnan Agricultural University:Natural Science

基　　金：云南省应用基金资助(2002C0043M)

摘　　要：针对玉溪市地烤烟种植新区"红花大金元"烤烟叶枯病发生严重且面积大并对产量影响较大的实际问题,采用对比分析方法,从叶枯病症状的田间分布、外部症状表现、内部养分变化等方面,对叶枯病的发生原因开展了相关分析研究。结果表明,该种叶枯病是一种由于土壤有效K供应不足而导致烟株含K量显著下降的生理性缺钾病,同时烟株N/K,Ca/K,Mg/K过高也是引起该病发生的重要原因。Leaf blight of the tobacco variety, Honghuadajinyuan, occurred at a large area and caused serious loss in a new tobacco planting area of Yuxi, Yunnan Province. The field distribution, apparent symptom and inner nutrient status of leaf blight were studied by comparison method. The result indicated that the disease was induced by K deficiency in the soil and very high ratios of N/K, Ca/K and Mg/K.

关 键 词：烤烟 红花大金元 叶枯病 缺钾症 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]