罗汉果根结线虫病无公害防治技术

多年的调查结果表明,罗汉果根结线虫病主要为害罗汉果根和块茎,使根结节状膨大,并通过病土、病苗、农具、灌溉水以及施用未腐熟农家肥等途径传播。发生严重的主要原因是压蔓繁殖种苗,种苗带病源,引发大田发病严重;种植区域由山区转向丘陵、平原,新环境较山区适合根结线虫繁殖发育;种植感病品种。无公害防治应采取种植无病苗、选择适宜的种植园地、合理轮作、加强果园管理、选用高效中低毒药剂防治等技术措施。

Pollution-free prevention and control of root-knot nematode (Meloidogyme javanica) in Luohanguo (Siraitia grosevenorii)

The investigation in many years showed that the diseases of Meloidogyme javanica in Siraitia grosevenorii mainly caused damages in roots and rhizome,which made the root expand like a joint and transported through the infected soil and seedlings,farming tools,irrigation water and applying organic fertilizer,etc.The main reason is when the seedling was propagated by bending the vines,the infected seedling could cause serious diseases in fields.And when the planting fields were changed from mountain areas to the hills and plains,the new environments are more suitable for the propagation of this disease species.In order to reach pollution-free prevention and control,the cultivation technique such as planting pollution-free seedling,selecting suitable planting field,reasonable rotation,improving the orchid management,applying efficient but low poison pesticides,etc.