作 者：
柴建萍;余凌;谢道燕;高东芬;郭石生;饶正荣;杨曙光;洪正杰;张云波;陈松
单 位：
楚雄市农业局蚕桑站;陆良县蚕桑站;保山市隆阳区蚕桑技术推广站;祥云县茶桑工作站;鹤庆县茶桑果药站;云南省农业科学院蚕桑蜜蜂研究所;云南省气象局农业气候中心
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
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。
译 名：
Occurrence and Control Measures of Brown Spot Disease and Powdery Mildew Disease in Mulberry Gardens of Different Regions of Yunnan Province
作 者：
CHAI Jian-Ping1 YU Ling-Xiang2 XIE Dao-Yan1 GAO Dong-Fen3 GUO Shi-Sheng3 RAO Zheng-Rong4 YANG Shu-Guang5 HONG Zheng-Jie6 ZHANG Yun-Bo7 CHEN Song1*(1Institute of Sericulture and Apiculture,Yunnan Academy of Agricultural Sciences,Mengzi Yunnan 661101,China;2Climate Center for Agriculture,Meteorologic Bureau of Yunnan Province,Kunming Yunnan 650034,China;3Sericultural Station of Lulian County,Luliang Yunnan 655600,China;4Sericultural Station of Chuxiong Municipal,Agricultural Bureau,Chuxiong Yunnan 675000,China;5Tea and Mulberry Workstation of Xiangyun County,Xiangyun Yunnan 672100,China;6Tea,Mulberry,Fruit and Drug Workstation of Heqing County,Heqing Yunnan 675007,China;7Sericultural Technology Promotion Station of Longyang District,Baosan Yunnan 678000,China)
关键词：
Yunnan sericultural region;Mulberry brown spot disease;Mulberry powdery mildew disease;Occurring stage;Disease index;Control
摘 要：
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.
