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Andy Robinson

Potato Extension Agronomist

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Potato Extension

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…

Blightline July 30, 2018

Blightline July 30, 2018

Conditions have not been favorable for late blight the past few days due to the dearth of rain, but morning dews are appearing that can be favorable for late blight infection. Late blight severity values have reached the late blight severity threshold value of 15 at all locations except Hofflund and Williston.

Blightline July 30, 2018 - Read More…

Aphid Alert for July 30, 2018

Aphid Alert for July 30, 2018

This week as had 43 aphid vectors (from 13 different species) recovered from 9 of the 13 sites reporting this week. Sabin and Ada reported the heaviest flights with 12 and 9 vector aphids respectively.

Aphid Alert for July 30, 2018 - Read More…

Blightline July 23, 2018 - Late Blight found in Ottertail county

Blightline July 23, 2018 - Late Blight found in Ottertail county

Late blight had been found in tomatoes in Ottertail county MN, no other late blight has been reported in our region. Late blight has also been reported in the Columbia Basin in Washington. Late blight severity values continue to increase and all locations except for Hofflund and Willinston- have reached the late blight severity threshold value of 15.

Blightline July 23, 2018 - Late Blight found in Ottertail county - Read More…

Aphid Alert

Aphid Alert

The aphids are coming, the aphids are coming.... We trapped significantly more aphids this week - 51 aphid vectors (from 7 different species) were recovered from 11 of the 13 sites currently reporting. This is a higher vector count than previously captured over the past 4 weeks COMBINED.

Aphid Alert - Read More…

Blightline July 16, 2018

Blightline July 16, 2018

No late blight has been reported in ND or MN or MB. Late blight has been reported in the Columbia Basin in Washington. Late blight severity values continue to increase and all locations except four – Hofflund, Linton, Mandan, Williston - have reached the late blight severity threshold value of 15. At this value, conditions for late blight have been favorable and disease is expected to occur if inoculum is present. Protectant fungicides should be applied to fields in areas that have reached the threshold value of 15 or greater.

Blightline July 16, 2018 - Read More…

Powdery Scab of Potatoes

Powdery Scab of Potatoes

Spongospora subterranea f. sp. subterranea (referred to as S. subterranea), the causal agent of powdery scab and root gall formation in potato, is a soil- and tuber-borne funguslike pathogen. S. subterranea first was reported in the U.S. in 1913. During this same year, the disease was found established in potato-growing states such as Maine, Florida, Minnesota and Oregon. To date, the pathogen can be found causing disease throughout the U.S., as well as several other potato-growing regions around the world.

Powdery Scab of Potatoes - Read More…

MN Area II Field Day

MN Area II Field Day

The MN Area II Field day will be held on July 17, 2018 at the Sand Plains Research Farm in Becker, MN. The field day will begin with a plot tour followed by supper.

MN Area II Field Day - Read More…

Blightline July 9, 2018

Blightline July 9, 2018

No late blight has been reported in ND or MN. Late blight has been reported in the Columbia Basin in Washington. Due to the rain activity, late blight severity values have accumulated rapidly and most locations have reached the late blight severity threshold value of 15.

Blightline July 9, 2018 - Read More…

Early Blight in Potato

Early Blight in Potato

Early blight of potato is caused by the fungal pathogen Alternaria solani. The disease affects leaves, stems, and tubers, and can reduce yield, tuber size, storability of tubers, quality of fresh-market and processing tubers, and marketability of the crop. This Extension article discusses the basics of early blight and fungicide resistance in Alternaria solani.

Early Blight in Potato - Read More…

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