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Andy Robinson

Potato Extension Agronomist

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Potato Extension

Focus on Potato: Late Blight Management Under Semi-Arid Conditions

Focus on Potato: Late Blight Management Under Semi-Arid Conditions

Late blight has the potential to be one of the most destructive diseases for potato growers. Late blight is influenced largely by environmental conditions. Management under semi-arid conditions can be quite different than managing the disease under wet, humid conditions. This presentation outlines effective control practices for growers who raise potatoes under semi-arid conditions. This presentation addresses the effect of irrigation on late blight, fungicide efficacy against late blight, the impact of weather, timing of fungicide applications, the effect of application method on fungicide residue, and the role of post-harvest products.

Focus on Potato: Late Blight Management Under Semi-Arid Conditions - Read More…

Give us your ideas for presentations at the International Crop Expo Potato meeting

Please let us know your thoughts on topics you would like to hear about during the potato session at the International Crop Expo on February 22-23, 2017 in Grand Forks, ND.

Give us your ideas for presentations at the International Crop Expo Potato meeting - Read More…

USDA starts Minituber Laboratory Testing Pilot with Private Laboratories

USDA starts Minituber Laboratory Testing Pilot with Private Laboratories

APHIS will provisionally approve qualified private laboratories to conduct pathogen testing of minitubers (Solanum tuberosum) and plant tissues used for the production of minitubers in support of U.S. export certification beginning August 2016. This pilot will allow APHIS to evaluate the use of private laboratory pathogen test results for phytosanitary certification prior to pursuing implementation through rulemaking.

USDA starts Minituber Laboratory Testing Pilot with Private Laboratories - Read More…

Final Aphid Alert for 2016

Final Aphid Alert for 2016

With only 2 trap locations reporting this week and no aphids recovered, this will likely be the last seasonal report for the Aphid Alert Network...

Final Aphid Alert for 2016 - Read More…

Aphid Alert week of Aug 22-26

Aphid Alert week of Aug 22-26

Trap capture numbers remain low as do the PVY Risk Index values. As the season winds down and night time temperatures decrease, we expect this to trend through. Several sites did not report this week and if trap contents come in early next week, we will add them to the report.

Aphid Alert week of Aug 22-26 - Read More…

Blightline August 26, 2016

Blightline August 26, 2016

The late blight that was been confirmed in a potato sample collected in Pembina County, ND earlier this week is US23 genotype. Surprisingly, no additional fields or locations with late blight have been reported in our area. Conditions remain favorable for late blight because of the cool temperatures and spotty showers. Growers should continue to scout frequently for late blight and apply protectant fungicides on a seven-day schedule, including fields that have been abandoned due to water damage. Scouting is especially important in fields along the Canadian border, in Pembina and Walsh counties and in wet fields in northeastern ND and northwestern MN that may be exposed to late blight spore showers. This late blight has the potential to spread to unprotected and abandoned fields near the infected field.

Blightline August 26, 2016 - Read More…

Speical edition of the NDSU Potato Blightline

Speical edition of the NDSU Potato Blightline

Late blight has been confirmed in a potato sample collected in Pembina County, ND. We do not yet know the genotype of the isolate. Late blight severity values in our area continue to increase and conditions remain favorable for late blight because of the wet conditions and spotty showers. Growers should continue to scout frequently for late blight and apply protectant fungicides on a seven-day schedule, including fields that have been abandoned due to water damage. Scouting is especially important in fields along the Canadian border and in wet fields in northeastern ND and northwestern MN that may be exposed to late blight spore showers. This late blight has the potential to spread to unprotected and abandoned fields near the infected field.

Speical edition of the NDSU Potato Blightline - Read More…

Blightline Aug 22, 2016

Blightline Aug 22, 2016

Late blight has not been reported in ND or MN. Late blight severity values in our area continue to increase and conditions remain favorable for late blight because of the wet conditions and spotty showers. All sites except Mandan and Williston have exceeded the threshold value of 15.

Blightline Aug 22, 2016 - Read More…

NPPGA Field Day 2016

NPPGA Field Day 2016

North Dakota State University and the University of Minnesota potato research will be highlighted during the Northern Plains Potato Grower Association Field Day on Thursday, Aug. 25. This year, the field day tour will travel to three locations. The day will begin at 7 a.m. with breakfast at Hoverson Farms near Larimore. Lunch and research presentations will be at the Forest River Colony near Inkster at noon. Also scheduled is a field tour of the irrigated research trials. The last stop will be at Oberg Farms near Hoople starting at 5:30 p.m. The final stop will include research poster presentations and an evening meal.

NPPGA Field Day 2016 - Read More…

Blightline August 15

Blightline August 15

Late blight has still not been reported in ND or MN despite very favorable conditions. Late blight severity values in our area continue to increase and conditions remain favorable for late blight because of the wet conditions and spotty showers. All sites except Linton, Mandan and Williston have exceeded the threshold value of 15. Severity values are high in all other locations and conditions have been favorable in southeastern ND and southwestern MN the past two days.

Blightline August 15 - Read More…

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