摘要
香料烟上发现的叶斑病主要在成熟或尚成熟叶片上发生,该病发病高峰期在3月下旬至4月上旬,此期间降雨和温度对病害流行影响较大。影响病害发生的主要因素还有:品种抗性及叶片成熟度等。农业措施中封顶能有效地控制细菌性斑点病,平均防效在90%以上,同时封顶后烟叶中总糖、还原糖、淀粉含量降低,烟碱含量提高,败花期为最适封顶时期。化学控制中以多宁防效较好,其次为K波尔多液可湿性微粉、农用链霉素。
According to the investigation, Oriental tobacco plants with symptoms of leaf spot were found in Baoshan from 2001. the symptoms was always occurred on the mature leaves in field, with. 65%-78% disease incidence and 4. 0 -4.8 disease index, respectively. The spreading state of disease was from last ten-day period in March to the first ten-day period in April. Effect of temperature and the rain on the leaf spot was great. Major factors influenced disease incidence also included the varieties type and its grow stage, culture system and field management. Among agricultural control message, Top removing had the significant effects on the disease, its control effects was over 90%. And the content of nicotine increased, while the the content of total sugar, reduced sugar and starch decreased to some extent. Flower withered time is the best time for removing the head of aromatic tobacco. 77% Duojing（ Copper hydrate） showed better control effects when tested in the field ,its control efficacy is 39. 6% to 48. 1%.
出处
《云南农业大学学报》
CAS
CSCD
2007年第5期645-649,658,共6页
Journal of Yunnan Agricultural University
基金
云南省烟草公司资助研究项目(98A29
04A07)
