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Pulse Crop Disease Update (06/21/18)

Ascochyta blight has been found by an NDSU pulse crop scout (Shawn Postovit) in chickpea fields in Williams and Burke Counties at up to 50% incidence.

 Pulse Crop Disease Update

Ascochyta blight has been found by an NDSU pulse crop scout (Shawn Postovit) in chickpea fields in Williams and Burke Counties at up to 50% incidence. Ascochyta first appears as scattered disease lesions on plants (Fig 1) but this disease can progress very quickly and thus foliar fungicides must be applied in a timely manner. Applications of systemic fungicides are advised as soon as trace levels of disease is detected. If weather remains cool and wet, applications of fungicides should continue every 10 to 14 days during bloom and early pod fill. Note that Strobilurin (FRAC 11) fungicides are not effective on Ascochyta blight on chickpeas as the pathogen, Ascochyta rabiei, has developed resistance. Further management recommendations can be found in the publication Management of Ascochyta Blight of Chickpea found on the Pulses: Tools for Growers webpage. Refer to the 2018 North Dakota Field Crop Plant Disease Management Guide for products currently registered on chickpea in ND.

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Audrey Kalil

Plant Pathologist

NDSU Williston Research Extension Center

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