三七根结线虫病病原研究

Studies on the Pathogen of Root-knot Disease on Panax notoginseng

报道三七的１种新病害：三七根结线虫病（ＰａｎａｘｎｏｔｏｇｉｓｅｎｇＲｏｏｔ－ｋｎｏｔＮｅｍａｔｏｄｅＤｉｓｅａｓｅ，ＰＲＮＤ）．病害的典型症状：感染根结线虫的三七植株地上部发黄、矮化，重病株枯死；根系长了大量根结，根结上长有一些短须根．标本采自云南省晋宁县昆阳农场．用形态学，鉴别寄主试验、酯酶和苹果酸脱氢酶电泳等方法鉴定病原线虫为北方根结线虫（ＭｅｌｏｉｄｏｇｙｎｅｈａｐｌａＣｈｉｔｗｏｏｄ，１９４９）．三七根结线虫病和北方根结线虫危害三七在云南省发现属首次报道．

The paper reports a new disease caused by a species of nematode on Sanqi Panax notoginseng(Burk)F.H.Chen,1948 .The samples were collected from the Kunyang farm in Jinning county,Yunnan Province.The typical symptoms of this disease show that the plants were infected with root-knot nematode become yellow,and lower than normal ones.Some of them even wilt and die.The root systems of plants have many galls on which there are some fibrous roots.The nematode has been identified by means of morphology,differential host,reaction esterase and malate dehydrogenase(MDH)analysis as Meloidogyne hapla Chitwood,1949,The disease is named as “ Panax notoginseng Root-Knot Nematode Disease(PRND)”