棉田黄萎病菌致病型结构初步研究

棉花黄萎病是棉花生产中的主要病害之一,广泛分布于世界各产棉国.控制该病的猖獗危害,已成为棉花生产可持续发展的主要问题1].利用不同抗性的棉花品种对棉黄萎病菌的选择作用,从棉田中分离获得不同的黄萎病菌菌系,在温室中采用2个抗病性差异明显的品种对其致病力进行测定,以明确同一块棉田是否存在不同致病力菌系.

A preliminary study on the virulence pathogenisity of Verticillium dahliae in cotton field

This paper analyzes the main characteristics of the invasion of exotic and detrimental plant pests in China as well as their regularity of outbreak and potential risk.At present the major problems in preventing the invasion of exotic plant pests in China exist with the management system,laws and regulation,quarantine and inspection means and techniques,personnel quality and financial investment.To strengthen the functions of plant quarantine,integrate quarantine management,establish fast response systems and ensure safe trade have been recognized as important organizational steps.It is urgent to perfect the quarantine legislation and manage- ment,innovate technical standards and adopt International Standards for Phytosanitary Measures(ISPMs), accelerate pest risk analysis and revise the list of quarantine pests,improve the quarantine and inspection means and techniques,construct pest free areas and pest free bases of production,establish specific founda- tion for plant quarantine and promote international cooperation and exchange.