摘要
桑褐斑病、桑里白粉病是云南蚕区的桑树主要病害。于2007、2008年调查以上2种病害在海拔由低到高的蒙自、保山、楚雄、陆良、祥云、鹤庆6县(市)坝区桑园的发生情况是:桑褐斑病的发生危害随调查地域的海拔升高呈逐渐加重的趋势,春末夏初、夏末初秋是桑褐斑病危害高峰期,重病区陆良、鹤庆点桑园9月份的病情指数最高可达71.18、68.80,其中病害对湖桑32号的危害重于农桑14号;桑里白粉病在各调查点桑园均呈零星分布危害,病情指数相对较低,夏末初秋是桑里白粉病危害主要时期。根据2种病害在各试验点的发生情况,建议正常年份陆良、保山、鹤庆坝区桑园重点防治桑褐斑病,兼治桑里白粉病,楚雄、祥云坝区桑园以防治桑褐斑病为主,2种病害在蒙自坝区桑园的发生危害较轻,不作为重点防治病害;当桑园田间调查病情指数为20时,应及时进行化学防治,并重视冬季、开春时节对病害的防治,以减少病原基数。
Mulberry brown spot and mulberry powdery mildew are two major mulberry diseases occurring in sericultural regions of Yunnan Province.From 2007 to 2008,occurrence of these two diseases was investigated in mulberry gardens located in dam areas of 6 counties（cities）,namely Mengzi,Baoshan,Chuxiong,Luliang,Xiangyun,and Heqing,with elevated altitude.The results indicated that occurrence of mulberry brown spot disease increased gradually with altitude of the survey site.End of spring to early summer and end of summer to early autumn were the peak occurrence periods of mulberry brown spot disease.In Luliang and Heqing,two survey sites with heavy occurrence of mulberry brown spot disease,the maximum disease index reached 71.18 and 68.80 in September respectively.In these two sites,damage of the disease to Husang 32 was heavier than that to Nongsang 14.Occurrence of mulberry powdery mildew disease showed a scattered pattern across all the survey sites with a relatively low disease index.End of summer to early autumn was the major occurrence period of mulberry powdery mildew disease.Based on occurrence of the two diseases in all survey sites,it is recommended that,in normal years,dam areas of Luliang,Baoshan and Heqing should mainly control mulberry brown spot disease and keep an eye on mulberry powdery mildew disease at the same time.Dam areas of Chuxiong and Xiangyun should mainly control mulberry brown spot disease.Occurrence of both diseases was not serious in dam areas of Mengzi,and was thus not the main control target.When disease index from mulberry field investigation reached 20,an immediate chemical control measure should be carried out.Meanwhile,control measures should be taken in winter and early spring periods to reduce the pathogenic populations.
出处
《蚕业科学》
CAS
CSCD
北大核心
2011年第3期532-537,共6页
ACTA SERICOLOGICA SINICA
基金
云南省农业攻关项目(No.2006NG15)
关键词
云南蚕区
桑褐斑病
桑里白粉病
发生时期
病情指数
防治
Yunnan sericultural region
Mulberry brown spot disease
Mulberry powdery mildew disease
Occurring stage
Disease index
Control
