本文主要研究内容
作者韩宁宁（2019）在《南宁市桑白粉病的发生特点及其病原菌重寄生真菌种类》一文中研究指出：桑白粉病是桑树上严重的病害之一,病害的发生导致桑叶布满白粉、质量变劣,严重影响桑树的长势,喂食感染白粉病的桑叶的家蚕体质弱,易诱发蚕病,蚕茧量、茧层量、茧层率均降低。本研究针对桑白粉病的发生情况,在南宁市广西大学农场开展田间系统调查、在广西壮族自治区蚕业科学研究院桑园进行踩点调查,结果发现,所调查地点均发生桑里白粉病,主要为害叶片背面,该病害除1月和2月外,其他时间均有发生,在1月份病情指数达到最高为80.94,病叶率在12月下旬达到最高为96.73%,12月产生黑色小颗粒即闭囊壳,翌年1月桑叶片脱落,病害结束;结合气象资料的分析结果发现,当日平均温度高于27℃时不利于桑里白粉病的发生,相对湿度越大越不利于该病的发生;桑表白粉病仅在所调查台湾大果桑品种上发生,主要为害桑叶正面,在发病部位产生分生孢子,11月出现黑色小颗粒即闭囊壳。通过形态学和分子生物学鉴定结果表明,南宁市发生的桑里白粉病由桑生球针壳(Phyllactinia moricola)引起,桑表白粉病由桑白粉菌(Erysiphe mori)引起。将发病桑叶阴干后分别置于4℃和室温环境下模拟越冬,并用中性红和亚甲基蓝的混合液染色后观察桑白粉病菌的成活情况,发现室内条件下桑里白粉病菌的分生孢子和子囊孢子均可成功越冬;但于12月将发病桑叶置于田间和埋于田间土壤下5cm,翌年3月病原菌已全部消失。杀菌剂对白粉病菌分生孢子萌发抑制的试验结果表明,供试的4种杀菌剂中,三唑酮对分生孢子萌发抑制率最高,为82.02%;其次为多菌灵抑制率为42.69%;甲基托布津的抑制率为37.02%;而石硫合剂对桑白粉病菌分生孢子的萌发没有抑制作用。田间调查过程中发现,桑白粉病菌的闭囊壳表面有重寄生现象,通过分离和回接桑里白粉病菌闭囊壳表面的疑似重寄生真菌,结果发现,2种真菌对桑白粉病菌有重寄生作用,通过形态学特征观察和ITS1/ITS4序列分析,鉴定出这两种重寄生真菌分别为尖孢枝孢(Cladosporium oxysporum)和刀孢轮枝菌(Lecanicillium psalliotae)。
Abstract
sang bai fen bing shi sang shu shang yan chong de bing hai zhi yi ,bing hai de fa sheng dao zhi sang xie bu man bai fen 、zhi liang bian lie ,yan chong ying xiang sang shu de chang shi ,wei shi gan ran bai fen bing de sang xie de jia can ti zhi ruo ,yi you fa can bing ,can jian liang 、jian ceng liang 、jian ceng lv jun jiang di 。ben yan jiu zhen dui sang bai fen bing de fa sheng qing kuang ,zai na ning shi an xi da xue nong chang kai zhan tian jian ji tong diao cha 、zai an xi zhuang zu zi zhi ou can ye ke xue yan jiu yuan sang yuan jin hang cai dian diao cha ,jie guo fa xian ,suo diao cha de dian jun fa sheng sang li bai fen bing ,zhu yao wei hai xie pian bei mian ,gai bing hai chu 1yue he 2yue wai ,ji ta shi jian jun you fa sheng ,zai 1yue fen bing qing zhi shu da dao zui gao wei 80.94,bing xie lv zai 12yue xia xun da dao zui gao wei 96.73%,12yue chan sheng hei se xiao ke li ji bi nang ke ,yi nian 1yue sang xie pian tuo la ,bing hai jie shu ;jie ge qi xiang zi liao de fen xi jie guo fa xian ,dang ri ping jun wen du gao yu 27℃shi bu li yu sang li bai fen bing de fa sheng ,xiang dui shi du yue da yue bu li yu gai bing de fa sheng ;sang biao bai fen bing jin zai suo diao cha tai wan da guo sang pin chong shang fa sheng ,zhu yao wei hai sang xie zheng mian ,zai fa bing bu wei chan sheng fen sheng bao zi ,11yue chu xian hei se xiao ke li ji bi nang ke 。tong guo xing tai xue he fen zi sheng wu xue jian ding jie guo biao ming ,na ning shi fa sheng de sang li bai fen bing you sang sheng qiu zhen ke (Phyllactinia moricola)yin qi ,sang biao bai fen bing you sang bai fen jun (Erysiphe mori)yin qi 。jiang fa bing sang xie yin gan hou fen bie zhi yu 4℃he shi wen huan jing xia mo ni yue dong ,bing yong zhong xing gong he ya jia ji lan de hun ge ye ran se hou guan cha sang bai fen bing jun de cheng huo qing kuang ,fa xian shi nei tiao jian xia sang li bai fen bing jun de fen sheng bao zi he zi nang bao zi jun ke cheng gong yue dong ;dan yu 12yue jiang fa bing sang xie zhi yu tian jian he mai yu tian jian tu rang xia 5cm,yi nian 3yue bing yuan jun yi quan bu xiao shi 。sha jun ji dui bai fen bing jun fen sheng bao zi meng fa yi zhi de shi yan jie guo biao ming ,gong shi de 4chong sha jun ji zhong ,san zuo tong dui fen sheng bao zi meng fa yi zhi lv zui gao ,wei 82.02%;ji ci wei duo jun ling yi zhi lv wei 42.69%;jia ji tuo bu jin de yi zhi lv wei 37.02%;er dan liu ge ji dui sang bai fen bing jun fen sheng bao zi de meng fa mei you yi zhi zuo yong 。tian jian diao cha guo cheng zhong fa xian ,sang bai fen bing jun de bi nang ke biao mian you chong ji sheng xian xiang ,tong guo fen li he hui jie sang li bai fen bing jun bi nang ke biao mian de yi shi chong ji sheng zhen jun ,jie guo fa xian ,2chong zhen jun dui sang bai fen bing jun you chong ji sheng zuo yong ,tong guo xing tai xue te zheng guan cha he ITS1/ITS4xu lie fen xi ,jian ding chu zhe liang chong chong ji sheng zhen jun fen bie wei jian bao zhi bao (Cladosporium oxysporum)he dao bao lun zhi jun (Lecanicillium psalliotae)。
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论文作者分别是来自广西大学的韩宁宁，发表于刊物广西大学2019-10-14论文，是一篇关于桑白粉病论文,发生特点论文,重寄生真菌论文,广西大学2019-10-14论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自广西大学2019-10-14论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：桑白粉病论文; 发生特点论文; 重寄生真菌论文; 广西大学2019-10-14论文;