The Roundup -

County Agent Update


Recap on the 2016 Disease Survey

This summer the Williston Research Extension Center started a scouting program with support from the Northern Pulse Growers Association (NPGA). The support by the NPGA provided funds for a full time crop scout, Adam Carlson NDSU student, to survey fields in Williams, Divide, Mountrail, McKenzie, and Burke. The program was for peas and lentils, which was successful at detecting several diseases this summer and determining their distribution across the region.

Foliar Diseases

Lentils: Ascochyta Blight and Anthracnose were found in most of the fields scouted, however the severity levels remained low over the course of the season. Stemphylium Blight of lentils typically develops in the last third of the season, from late bloom through pod fill the levels observed were low. White mold was assessed at crop maturity and was found sporadically at low to moderate levels.

Pea: Ascochyta Blight was found in most fields but severity levels were low. Bacterial blight increased in incidence over the course of June and was found in all fields scouted in mid-July, most likely due to frequent precipitation but again severity remained low. Powdery Mildew was identified in central and north central McKenzie County. White Mold was found in central Williams County and north central Divide County.

Root Rot

Lentils: root rot symptoms were mild in May, but severe in some fields by early to mid-June. Fusarium sp. and Pythium sp. were isolated from symptomatic roots. 170 root rot samples were analyzed in total. One field in southern Williams County was also positive for Aphanomyces.

Peas: Over 50 root rot samples were taken from pea fields and root rot was either absent or mild in most samples tested. However, five fields contained moderate to severe root rot late in the season. Pythium sp. and Fusarium sp. were most commonly isolated from symptomatic roots.

For more information about this study conduction, contact Audrey Kalil, Plant Pathologist at the Williston Research Extension Center.


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