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

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...

read more

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...

read more
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 2018

Spring weather in 2018 was favorable for late blight development. Be sure you are taking steps to protect your potato crop. The spring weather experienced in southern Idaho was optimum for the development of late blight. With no late blight reported in the state in...

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...

Managing Late Blight in Southern Idaho in 2016

Late blight was positively confirmed in several counties in eastern Idaho in 2015. This increases the risk of the disease appearing again in 2016. The resources here will help you manage this devastating disease.  Presentations were given in American Falls and...