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Andy Robinson

Potato Extension Agronomist

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Potato Extension

Aphid Alert for August 25-31

Aphid Alert for August 25-31

With the season winding down, aphid numbers are definitely trending downwards, only 52 aphids, 38 of which were vector species were recovered from traps at 10 locations this week.

Aphid Alert for August 25-31 - Read More…

Blightline August 27, 2018

Blightline August 27, 2018

This will be the final regular NDSU Potato Blightline for 2018. Congratulations to all the potato industry in our region. No late blight was reported in ND, MN or MB during this growing season. Late blight has been reported in SE Michigan.

Blightline August 27, 2018 - Read More…

Aphid Alert Week of August 18-24

Aphid Alert Week of August 18-24

Aphid vector counts are still decreasing. This week we recovered a total of 133 aphids, 117 of which were vectors. We did, however, only have 10 sites reporting.

Aphid Alert Week of August 18-24 - Read More…

Blightline August 20, 2018

Blightline August 20, 2018

No late blight is reported in ND or MN or MB. Late blight is reported in commercial fields in Adams and Marquette counties in Wisconsin. Conditions remain not favorable for late blight the past few days. Continue to apply protectant fungicides on a seven-day schedule for irrigated fields and a 7 to 10 day schedule for non-irrigated fields. Scout fields for late blight until vine kill and harvest.

Blightline August 20, 2018 - Read More…

Aphid Alert week of August 11-17, 2018

Aphid Alert week of August 11-17, 2018

Well, the aphid vector numbers are down a bit from last week - we caught approximately what we caught 2 weeks ago. We're still seeing high diversity in the species captured, recovering aphids from 12 different aphid species from 15 of the 16 sites reporting. Hoople (42), Sabin (33), Ada (29), Gully (22), and the site in Nebraska (26) led the counts in trap captures this week.

Aphid Alert week of August 11-17, 2018 - Read More…

Blightline Aug 13, 2018

Blightline Aug 13, 2018

No late blight has been reported in ND or MN or MB. Late blight has been reported in commercial fields in Adams and Marquette counties in Wisconsin. Conditions have not been favorable for late blight the past few days.

Blightline Aug 13, 2018 - Read More…

Tobacco Rattle Virus in Potato

Tobacco Rattle Virus in Potato

Corky ring spot is becoming more economically important across several potato production regions in the U.S. largely due to the spread of the virus and because of restrictions on the use of current chemical control options. Tobacco rattle virus incidence has been reported in potato production areas in California, Colorado, Florida, Idaho, Michigan, Minnesota, North Dakota, Oregon, Washington and Wisconsin. The virus has a broad host range, including potato, tobacco, corn, barley, sunflower, ornamental (tulip, iris, etc.) and a variety of weed hosts. The virus is transmitted in the field by soil-inhabiting stubby root nematodes of the genera Trichodorus and Paratrichodorus. Nematicides, soil fumigation and resistant cultivars can be used for nematode management. Detecting and quantifying viruliferous nematodes is important for making planting decisions and management approaches.

Tobacco Rattle Virus in Potato - Read More…

Aphid Alert August 10, 2018

Aphid Alert August 10, 2018

Another big aphid week! A total of 301 aphids, 263 of which were vector species. We're continuing to see a lot of different species captured; 15 different aphid species from 14 of the 16 sites reporting. The heaviest flights were in Grenora (80), Crookston (37), and Perham (36).

Aphid Alert August 10, 2018 - Read More…

Blightline August 6, 2018

Blightline August 6, 2018

No late blight has been reported in ND or MN or MB. Conditions have been favorable for late blight the past few days especially in eastern ND and western MN, and morning dews continue to provide leaf wetness that favors infection. Late blight severity values have reached the late blight severity threshold value of 15 at all locations except Hofflund and Williston. Protectant fungicides should be applied to fields in areas that have reached the threshold value of 15 or greater on a seven day schedule for irrigated fields and a 7 to 10 day schedule for non-irrigated fields.

Blightline August 6, 2018 - Read More…

Aphid Alert Aug 3, 2018

Aphid Alert Aug 3, 2018

We recovered a total of 130 aphids,120 of which were vector species (15 different species!) from 13 of the 14 traps reporting this week. Some surprises, some expecteds... About 1/3 of the aphids captured were small grain aphids; no surprise there, harvest has begun and grain aphids are seeking better hosts.

Aphid Alert Aug 3, 2018 - Read More…

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