Research Library

Early Blight & Brown Leaf Spot

Early blight (caused by Alternaria solani) is a common problem in southern Idaho.  

This disease can destroy leaves and cause tuber blemishes after harvest.  Varieties differ in susceptibility to this disease.  Additionally, plant fertility is an important component to reducing the severity of disease.  

Many fungicides are available which can help suppress disease to manageable levels.  A related disease called brown leaf spot (caused by Alternaria alternata) can also be problematic on potatoes, but this is not as aggressive as early blight. 

Additional Resources

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New Potato Webcasts Available

New resources are now available to help manage potato diseases. New webcasts are now open for public access at Focus on Potato.   • Stubby-Root Nematodes and Corky Ring Spot of Potato - George W. Bird, Michigan State University, September...

Weed Control in Potatoes – 2015

Recent rains have made weed control in potatoes difficult in 2015.  Dr. Pamela J. Hutchinson from the University of Idaho discusses options for managing these weeds. From Dr. Pam Hutchinson at the University of Idaho: I’ve had many calls about weed control in...

Stripe Rust in Southern Idaho, 2015

Stripe rust has been found in many fields in southern Idaho.  Dr. Juliet Marshall and others at the University of Idaho have provided resources to help growers make effective disease management decisions. From Dr. Juliet Marshall, University of Idaho:  ...

Miller Research Potato Pest Management Workshop

2013 Miller Research Potato Pest Management Workshop was December 16 and 17 in Rupert, ID. Miller Research LLC held its annual potato pest management research meeting Monday, December 16 and Tuesday, December 17.     Copies of the presentation handouts can...

Fungicides for Managing Potato Late Blight

There are a lot of fungicides available for managing late blight. One of the attached articles discusses what to use and how to use it. The other lists steps growers can take approaching harvest and going into storage. Late blight was identified in central Bingham...

White Mold Management in Potato

Fungicide choice, application method, and timing of application are important in managing white mold of potato. Multiple fungicides are available for managing white mold in potato.  The attachments below discuss how fungicide selection, method of application, and...