摘要
研究表明,苎麻炭(广且)病的初侵染源主要是病残体。此病的发生有如下几个特点:(1)病害的田间消长与气象因子关系甚为密切,日均气温20～30℃和相对湿度大于80%的气候条件有利于该病的发生;(2)品种间的抗性存在明显的差异,芦竹青和宜杂2号较抗病,宜苎1号较感病;(3)麻田施用尿素处理,炭疽病发生重于有机肥处理,并且发生的严重度与无机氮的施用量呈正相关,与钾肥无显著相关性;(4)水稻土和沙质壤土病情重于丘陵红壤土麻田;(5)低洼积水和连作均加重该病的发生.
Studies showed,the initial inoculum source of ramie antheronose was mainlyfrom diseased plant debris.The occurence characteristics of the disease wereas follows,1.the disease severity was closely related to climatic factors.Meandaily temperature 20～30℃ and relative humidity>80% favoured the diseasedevelopment.2.there was significant resistant difference between cultivars.Cultivars Luzhuqing and Yiza 2 were more resistant,while cultivar Yizhu 1was more susceptible.3.different kinds of manure and different amounts ofmanure resulted in different disease severity.The disease in the fieldsfertilized with urea was more severe than that with organic fertilizer.Therewas significantly postive correlation between disease index and the amountof nitrogen,but not between disease index and the amount of potassiumfertilizer.4.plants grown in rice land and sandy loam land developed thedisease more severely than those grown in red loam at hills.5.low-lyingland with long-standing water and continuous cropping would aggravate thedisease development.
出处
《江西农业大学学报》
CAS
CSCD
1990年第1期60-64,共5页
Acta Agriculturae Universitatis Jiangxiensis
关键词
苎麻
炭疽病
初侵染源
发生规律
Ramie Anthracnose
Initial inoculum source
the rule of occurrence
