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

Potato Disease Quiz

The answers are in! For those attending the Idaho Potato Conference and participating in the Disease Quiz, see how you did!

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Strobilurins for Early Blight Control in Potato

Strobilurins for Early Blight Control in Potato When Quadris was introduced for managing foliar diseases of potatoes in 1998, growers' ability to control early blight increased dramatically.  Other strobilurin products have followed.  Recently fungicide resistance has...

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Managing Early Blight, 2012

Managing Early Blight, 2012 See how different fungicide regimes performed against early blight and white mold for disease control, yield, and economic return. We utilized four applications on Russet Burbank to evaluate the impact of fungicide programs on early blight...

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Miller Research Potato Pest Management Workshop

Miller Research Potato Pest Management Workshop

Miller Research LLC held its annual potato pest management seminar Thursday, January 31, 2019, at the Historic Wilson Theater in Rupert (610 Fremont St). Links to the presentations are found below. 8:30-9:00  Registration  9:00-9:30 Pink Rot Management - Trent Taysom ...

Managing Potato Late Blight in 2019

Managing Potato Late Blight in 2019

Late blight has been confirmed in Minidoka County. It is critical for growers to manage the potato crop for late blight until the tubers are in the storage. The spring weather experienced in southern Idaho in 2019 was optimal for the development of late blight. Late...

Miller Research Potato Pest Management Workshop

Miller Research Potato Pest Management Workshop

Miller Research LLC held its annual potato pest management seminar Tuesday, January 30, 2018. The meeting focused on diseases affecting potatoes in the Pacific Northwest and methods for minimizing these diseases. Miller Research LLC held its annual potato pest...

Pink Rot and Leak Management

Pink rot and leak are damaging diseases of potatoes both in the field and in storage. Learn more about pink rot and leak management here. Miller Research was invited to give a presentation at the 9th Washington/Oregon Potato Conference on Wednesday, January 24, 2018....

2017 Miller Research Potato Day

Come to the 2017 Miller Research Potato Day, Saturday October 7 from 8:00 am to 12:00 noon.  All are invited to come and pick potatoes at the Miller Research Farm at 225 North 400 East (east side of the road behind the trees) in Rupert on Saturday, October 7 from...