Preparing for Late Blight

Published online: Apr 17, 2015 Fungicide, Potato Harvesting
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The presence of late blight in eastern Idaho in 2014 highlights the importance of managing for the disease in 2015. The resources here will help you prepare to manage this devastating disease should it appear in 2015. 

The attached issue of Potato Progress has a nice article by Dr. Phill Wharton and colleagues at the University of Idaho and Michigan State University.  In the article they discuss the threat of potatoes surviving the winter as volunteers or in cull piles. If overwintering tubers are infected with Phytophthora infestans, these could be the source of late blight in 2015.

Dr. Phill Wharton at the University of Idaho has published a nice alert on tomato and potato late blight. This publication discusses the role of tomatoes in late blight epidemics.

More information on late blight can be found at the Idaho Potato Diseases: Late Blight page.  

Two publications from Miller Research on using fungicides to manage late blight can be found here.

The American Phytopathological Society has published an overview on late blight titled “Late Blight of Potato and Tomato.” This article shows various symptoms and photos, a description of the life cycle, and management practices.

Information on how to manage late blight from an organic point of view can be found here.

To be kept up to date on any positive identification of late blight, subscribe to the Pacific Northwest Pest Alert.


Source: Miller Research