June 20, 2011: Nepal rust survey summary – Yellow rust widely distributed, leaf rust more localized

Extensive wheat rust surveys were undertaken by several research institutes in Nepal during March to May 2011. The Central wheat growing areas from the lowlands to mid-hills were covered by the survey teams. A total of 71 sites were surveyed using standard BGRI survey methodology. yellow rust predominated on the surveys, being recorded at 49 of the sites visited. Severity of yellow rust recorded was quite high as 80% of the fields with yellow rust had moderate or high (>20%) severity ratings. Yellow rust was distributed throughout the survey areas.

Leaf rust was recorded at 13 sites, with more than 50% of these sites reporting moderate or high severity (>20%). Leaf rust was dispersed throughout the survey areas, although there did appear some concentration of observations in the Kathmandu Valley area.

Only one record of stem rust was reported, late in the season at the NARC Khumaltar Research Station in Kathmandu.

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