陇南地区小麦条锈病发生动态与治理

1985～1990年作者对甘肃省陇南地区小麦条锈病秋苗菌源动态、越冬情况及其春季流行等进行了调查研究。结果表明,该地区秋苗发病重、越冬菌源多是导致春季小麦条锈病大流行的重要原因之一。海拔1600～1800m及其相邻的部份地区秋苗发病严重或较重,是发病基地或菌源基地,亦是治理的关键地区。其治理的配套关键技术包,括改制控害、抗病品种合理布局、适期晚播和粉锈宁拌种等都是行之有效的技术。其中通过改制,建立新的农业生态体系,兼与抗病品种合理布局和调节播期相结合,构成综合的生态治理工程,并不断优化,便有可能实现持久控害致富的目的。

OCCURRENCE AND MANAGEMENT OF WHEAT STRIPE RUST (PUCCINIA STRIIFORMIS WEST) IN AUTUMN, WINTER AND SPRING IN THE SOUTH OF GANSU PROVINCE

Occurrence of wheat stripe rust (Puccinia striiformis West. )in the autumn, overwintering and epidemics in the spring were investigated in the South of Gansu Province during 1985-1990. As the results indicate,disease epidemic levels in the spring is highly correlated with the local inoculum sources and its percent of overwintering. The areas of 1600-1800m or so above sea level,where stripe rust usually occurred severely in the autumn,is the main sources of inoculum for local epidemic and for the areas where the rust is absent,which could be considered as the critical areas for the disease management. Complete sets of the practical control techniques including the altering cultivation, reasonable deployment of cultivars with various levels of resistance,later planting in the suitable sowing date and seed dressing with tridimefon have been developed. However, establishing a new agro-ecosystem by means of changing cultivated practices,improving resistance cultivars and regulating planting date is recommended as a more economical and practical policy decision for the sustainable control of wheat stripe rust epidemic in that area.