甘肃南部小麦条锈病越夏考察

Joint Survey of Oversummer of Wheat Stripe Rust in Southern Gansu

考察确认甘肃南部是小麦条锈菌越夏的适宜地区。在甘南州和临夏州大部分地区,条锈菌在晚熟春麦上越夏,越夏菌源主要侵染临近地区自生麦苗。在陇南地区和甘南州的舟曲等地,条锈菌主要在海拔1600 m以上地带的自生麦苗上越复,越夏后侵染冬小麦秋苗。文中讨论了甘肃省小麦条锈病越夏区划以及越夏调查与越夏区治理所面临的主要问题。

The joint survey confirmed that the southern Gansu is the suitable area for c ersummer of wheat stripe rust (Puccinia striiformis West. ) The pathogen over-sur aered on the plants of late-spring wheat in the major parts of Gansu and Linxia au-t .mous Prefecture wherein the rust inocula spread and infect volunteer seedlings. In Longnan Prefecture and Zhouqu county in south Gansu, the pathogen oversummered mainly on the volunteers of winter wheat in the belt at an altitude of-1 600 m above sea level and produced urediospores, which infected seedlings of winter wheat after autumn sowing. The oversummering regionalization, surveying method and the main problems of management of oversummer regions were discussed in this paper.