The WSU Potato DAS Alerts are relevant to potato production in the Columbia Basin in Washington. If you would like to subscribe to our alerts, click HERE and select Potato DAS.
September 17th 2021 WSU POTATO ALERT - 21st potato alert of the 2021 growing season, and will be the last regularly scheduled alert for the season.
Potato psyllids were found on sticky card traps in 73% of the fields monitored this week, and about 20% of those fields had counts in the very high range. Potato fields that are still green are likely to harbor psyllids that have been displaced from fields that have been harvested. But, this will only concern growers with potato fields that are about two or more weeks away from vine kill. The maps (below) show interpolated potato psyllid population densities across the Columbia Basin using our trapping network results. Go to Potato DAS and create a free account to scroll through the maps and view them in detail.
September 10th 2021 WSU POTATO ALERT - 20th potato alert of the 2021 growing season.
The 2021 growing season is quickly coming to a close, but there are a couple of pests to watch out for in the weeks leading up to harvest. Risk-averse growers are recommended to use a "no gaps" insecticide program to control psyllids from now until a week or two before vine kill. Most potato tubeworm feeding injury to tubers occurs after vine kill or senescence when the larvae move from the foliage to the tubers.
A new space for the weekly resource you trust, Welcome to Potato Alerts with Potato DAS. Aphids are multiplying quickly in a lot of potato fields in the region. We found them in 86% of the fields we monitored this week. Additionally, the late blight forecast shows that late blight has not been reported in the Columbia Basin of Washington.
August 27th 2021 WSU POTATO ALERT - 18th potato alert of the 2021 growing season.
This week, Potato psyllids were found on sticky card traps in 66% of the fields we monitored, Lygus bugs were found in 98% of the fields sampled, and it looks like significant Dodder issues this year.
August 20th 2021 WSU POTATO ALERT - 17th potato alert of the 2021 growing season.
Aphids were collected in most (92%) of the fields we monitored this week. Check fields at least weekly to monitor aphid populations. Lygus bugs got off to a slow start in the Columbia Basin this season, but this week we found them in 97% of the fields sampled.
August 13th 2021 WSU POTATO ALERT - 16th potato alert of the 2021 growing season.
Aphid counts continue to climb. Aphids were collected in 100% of the fields we monitored this week. Have you seen Dodder? Dodder is a parasitic plant that can infest many different crops including potatoes, onions, carrots, asparagus, cucurbits, alfalfa, sugar beets and many weeds.