US: Alternatives to chlorothalonil for potato late blight control

Conditions for late blight development throughout Michigan are conducive for the appearance of late blight. No late blight has been found in Michigan as of June 15, 2015, although the disease has now appeared in North Carolina and Florida on potatoes. Chlorothalonil supply for 2015 is limited. Potato growers, therefore, have a dilemma about what to base their late blight control programs on. There are limited supplies of Bravo-based and Echo-based products available and growers should endeavor to secure supplies. Full information on rates of most of these products is available on the Late Blight Risk Monitoring website. Full article