水稻、玉米和小麦纹枯病菌对3种作物的交互致病性

Cross-pathogenicity of Rhizoctonia spp.from rice, maize and wheat on these three crops

摘要:
目的明确水稻、玉米和小麦纹枯病菌菌株对水稻、玉米和小麦的致病力差异.
方法本研究选用水稻、玉米和小麦的纹枯病菌菌株各20株, 通过人工接种对这些菌株在水稻、玉米和小麦3种作物上的交互致病性进行了测定.
结果和结论 各供试纹枯病菌菌株都能单独侵染3种作物, 但它们对不同作物的致病力存在较大差异:对原寄主的致病力较强, 而对其他2种供试寄主的致病力较弱.本研究结果为预防作物轮作和间作过程中的交互感染提供了重要的理论依据.

Abstract:
Objective To clarify the pathogenicity differences of Rhizoctonia spp.strains isolated from different crop hosts.
Method Twenty R.solani strains were isolated from rice, maize and wheat plants respectively.Their cross-pathogenicities of R.cerealis to rice, maize and wheat were determined by artificial inoculation.
Result and conclusion Each isolate of R.solani and R.cerealis was able to infect these three crops, but the virulences on different crops were quite different.It showed stronger virulence on the original host, while weaker virulence on other hosts.These findings provide an important theoretical basis for the prevention of cross-infection of different plant pathogens in the crop rotation and intercropping processes.