Potato Extension
Late Blight Found in Becker County, MN - Blightline August 22
Late blight has been found in a second county in Minnesota. Today a sample was found in Becker County.
Late Blight reported! Blightling Aug 20, 2014
Late blight has been reported in a field of Russet Burbank processing potatoes in Sherburne County, MN by a local consultant. Disease is confined to one field and incidence is limited. The genotype has not yet been identified. This is the first report of late bight in our region. Growers should continue to apply protectant fungicides for both late blight and early blight and continue to scout for late blight. Morning dews that form this time of the year provide free moisture necessary for late blight infection.
NPPGA Field Day set for August 21, 2014
The annual potato field day tour will travel to three locations - Larimore, Inkster and Hoople - on Aug. 21. The field day begins at 7 a.m. with breakfast at Hoverson Farms near Larimore. Research presentations will begin after breakfast. Lunch and research presentations will be given at the Forest River Colony near Inkster starting at noon. Following lunch, a field tour will highlight irrigated research trials. The twilight tour will be at Oberg Farms near Hoople starting at 5 p.m. This will include a barbecue and research presentations by North Dakota State University and University of Minnesota potato researchers and Extension specialists.
Blightline August 18, 2014
Late blight has not been reported in our region of ND, MN or MB. Growers should be applying protectant fungicides for both late blight and early blight and continue to scout for late blight. Morning dews that form this time of the year provide free moisture necessary for late blight infection.
Aphid Alert II
Aphid Alert II trap catches for the week ending Aug 15 are now available. Aphid vector numbers in seed potatoes took a huge jump this past week with capture numbers doubling at most locations! Vector species captured include lots of small grain aphids (not surprising given maturing small grains), green peach aphid from two locations, and soybean aphid from multiple locations. Aphid scouting and management should be well underway! If you're in a position to kill vines early, consider it. Most of our PVY is transmitted in the late season.
Blightline Aug 11
Late blight has not been reported in our region of ND, MN or MB. The late blight severity threshold value of 15 has been reached at all locations. For our conditions, application of a protectant fungicide such as mancozeb or chlorothalonil on a 7-10 day schedule is recommended.
Christian Thill
It is with great sadness that I have to tell you Christian Thill passed away unexpectedly on Friday morning of an irregular heart beat.
Aphid Alert II: Aug 8. Aphid number are increasing rapidly!
Trap catches from the Aphid Alert II suction trap network are in for the week ending Aug 8. This has been one of the biggest capture weeks so far this summer. We had large increases in almost all trap locations over last week. If you have not started aphid management, it's time to start!
Blightline August 7, 2014
Late blight has not been reported in our region of ND, MN or MB. The late blight severity threshold value of 15 has been reached at all locations. For our conditions, application of a protectant fungicide such as mancozeb or chlorothalonil on a 7-10 day schedule is recommended.
Focus on Potato: Phosphorous Acid and its use in Potato Post-Harvest Situations
Dr. Steven Johnson from the University of Maine. This presentation will help consultants, extension agents, growers, and other practitioners in the potato-producing states to understand more about phosphorous acid and its use in potato post-harvest situations. Specifically in this presentation, practitioners will learn the differences between phosphorus containing compound used in agriculture, what pathogens are controlled by phosphorous acid, and how to apply the material onto potatoes entering storages. By the end of this presentation, the practitioner should increase their knowledge of phosphorous acid and how to best use it in potato post-harvest situations for optimal disease control.
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