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UI Talk Tuesday session for July 16 cancelled
All Crops All Locations
General announcment
Posted on: July 11, 2019 by Kasia Duellman
The UI Ag Talk Tuesday session scheduled for July 16 at the Bonneville County Fairgrounds (Idaho Falls) has been cancelled.
The remaining sessions are still planned.
August 6 (8:00 AM):
Bannock County Extension Office
10560 Fairgrounds Rd
Pocatello
Topics:
Economics/cost of production/markets forecast (Ben Eborn)
Weeds update (Pam Hutchinson)
Other topics determined by those who attend
August 20 (8:00 am)
Minnidoka County Extension Office (McGregor Center)
85 East Baseline Rd
Rupert
Topics:
Utilizing Barn Owl Boxes to Manage Voles (Jason Thomas)
Cover crops (Steve Hines)
Aphid Monitoring, Storage disease issues (Kasia Duellman)
Weed update (Pam Hutchinson)
Other topics determined by those who attend
Psyllid monitoring program underway
Potato All Locations
Potato Psyllid
Posted on: July 11, 2019 by Lucy Standley
The 2019 University of Idaho monitoring program for potato psyllids and liberibacter (Lso), the bacterium associated with zebra chip disease (ZC), is underway. Following recommendations from our ZC Advisory Committee last year, we shortened the duration of the program. We also plan to post weekly updates by Thursday each week instead of Friday.
This week, we collected 38 psyllids from sticky cards (across 20 sites).
Psyllids were collected on sticky traps in potato in the following counties: Payette (2 fields), Canyon (7 fields), Owyhee (2 fields), Elmore (3 fields), Twin Falls (3 fields), Jerome (2 fields), and Minidoka (1 field).
We had traps deployed in 53 of the 83 fields (63.8%) monitored this year and found psyllids in 19 of the monitored fields (37.7%).
During the previous week (before the monitoring program officially began), we collected 14 psyllids across 7 of 25 fields that were monitored (psyllids were captured in Payette, Canyon, and Owyhee counties).
All psyllids tested so far have been negative for Lso. Nevertheless, we urge growers and crop consultants to maintain their IPM programs.
“Heat maps” of this week’s results will not be made given that a relatively low number of psyllids and sites (traps in several fields were just deployed this week) tends to result in skewed maps.
More information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the links under “Updated weekly reports” for details on trap captures.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
Onion Thrips update 7/6/2019
All Crops All Locations
Onion thrips
Posted on: July 7, 2019 by Stuart Reitz
Overall thrips pressure continues, as is typical for early July. With the warmer conditions, thrips will develop faster so numbers will rebound sooner after insecticide applications. At this time of year, most thrips are ones developing within onion crops. However, dispersal from other plants still continues. Wheat has dried down so the thrips have left it; do pay attention to when hay fields are cut as significant numbers of onion thrips can disperse out of those fields after cutting.
I found Iris yellow spot in about 20% of the fields this week. Those fields have been in Ontario, Nyssa and Fruitland. So far, it has been at low levels in most of those fields.
Adults per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29 7/6
Oregon Slope/Weiser 0.03 0.04 0.06 0.15 2.47 4.41 5.22 5.51
Vale 0.15 0.55 1.64 2.60 4.79 6.44 5.72 3.99
Ontario 0.07 0.03 0.78 0.71 1.92 4.35 5.98 5.66
Nyssa 0.02 0.07 1.32 1.03 3.67 5.20 7.33 3.98
Adrian 0.02 0.22 1.60 1.67 2.15 2.63 7.60 2.82
Fruitland 0.05 0.03 0.19 0.94 1.29 6.12 6.30 1.82
Parma - 0.09 1.60 0.67 2.75 7.89 3.47 6.54
Overall Average 0.06 0.15 1.03 1.11 2.72 5.29 5.95 4.33
Immatures per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29 7/6
Oregon Slope/Weiser 0.00 0.00 0.00 0.26 5.45 12.55 9.90 10.19
Vale 0.00 0.41 6.28 4.20 11.16 5.99 11.64 17.73
Ontario 0.00 0.00 3.60 1.71 8.71 22.81 21.28 9.63
Nyssa 0.00 0.02 3.56 5.52 8.00 10.58 26.98 12.75
Adrian 0.00 0.00 8.42 3.64 5.45 1.10 5.17 8.92
Fruitland 0.00 0.00 0.16 2.20 3.39 7.62 1.55 0.46
Parma - 0.00 1.97 4.37 1.66 2.90 12.78 49.01
Overall Average 0.00 0.06 3.43 3.13 6.26 9.08 12.76 15.53
Total average per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29 7/6
Oregon Slope/Weiser 0.03 0.04 0.06 0.42 7.92 16.96 15.12 15.69
Vale 0.15 0.96 7.92 6.79 15.96 12.43 17.36 21.71
Ontario 0.07 0.03 4.38 2.42 10.63 27.16 27.26 15.29
Nyssa 0.02 0.09 4.88 6.55 11.67 15.78 34.31 16.73
Adrian 0.02 0.22 10.01 5.31 7.61 3.73 12.77 11.74
Fruitland 0.05 0.03 0.35 3.14 4.68 13.74 7.85 2.28
Parma - 0.09 3.58 5.03 4.41 10.79 16.25 55.56
Overall Average 0.06 0.21 4.45 4.24 8.98 14.37 18.70 19.86
% Plants with Thrips
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29 7/6
Oregon Slope/Weiser 0% 4% 6% 14% 68% 81% 93% 86%
Vale 0% 31% 64% 54% 81% 83% 76% 89%
Ontario 0% 3% 34% 35% 73% 89% 96% 75%
Nyssa 0% 5% 73% 56% 70% 87% 97% 71%
Adrian 0% 19% 57% 53% 70% 86% 98% 87%
Fruitland 0% 3% 17% 50% 54% 94% 100% 65%
Parma 0% 7% 54% 41% 89% 84% 74% 90%
Overall Average 0% 10% 43% 43% 72% 86% 91% 80%
IYSV Incidence (% plants with lesions)
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29 7/6
Oregon Slope/Weiser 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Vale 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Ontario 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.9% 1.0%
Nyssa 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.1% 0.2%
Adrian 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Fruitland 0.0% 0.0% 0.0% 0.0% 0.0% 0.2% 9.4% 6.1%
Parma 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Overall Average 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 1.5% 1.0%
* the decrease in Fruitland is a sampling artefact – this week includes fields not sampled last week because of spraying
Malheur Experiment Station Field Day July 10, 2019
All Crops Treasure Valley
Posted on: July 2, 2019 by Janet Jones
You are invited to the Malheur Experiment Station Summer Farm Festival and Annual Field Day!
Place: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
Date: Wednesday, July 10, 2019
Registration starts at 8:00 am with coffee and donuts
Click on the PDF below for the tour descriptions and schedule.
A complimentary lunch will be served at noon.
For more information call Jan Jones at (541) 889-2174 or email janet.jones@oregonstate.edu.
July 17 Aberdeen Collaborative Field Day
Small Grains All Locations
Cereal Field Days - Update on varieties, diseases (stripe rust, foot rots, frost damage, etc)
Posted on: July 2, 2019 by Juliet Marshall
Wednesday, July 17 | 8:30 a.m.
FREE and open to the public - Please share this invitation!
Aberdeen Research Station | 1693 2700 West Rd, Aberdeen, ID 83210
Google Map
See the latest in advanced grain genetics
Tour of current and new public and private winter wheat and barley varieties for southern Idaho
Q&A with experts from the University of Idaho, The Andersons and Limagrain Cereal Seeds
Eat, drink and be merry
Hot coffee and donuts to greet you
Catered lunch with good company
Wheat and barley food products to sample
Collaborative local craft brew with Mountain Malt and Portneuf Valley Brewing
Reserve your spot by Monday, July 8
University of Idaho | jmarshall@uidaho.edu
Limagrain Cereal Seeds | hannah.kammeyer@limagrain.com
Onion Thrips update 6/28/2019
Onion Treasure Valley
Onion thrips
Posted on: June 30, 2019 by Stuart Reitz
Below are the results from this past week’s thrips monitoring program. Thrips pressure continues to be strong – as there were increases in adults and immatures in most areas. Please keep in mind that numbers vary from field to field.
This week, we found Iris yellow spot virus in fields in Ontario, Nyssa and Fruitland, with the highest levels around 10% in a couple of fields. Infected plants have been more abundant closer to the edges of fields, which suggests that most transmission at this time is from adults dispersing into fields. That would change later in the season if immature thrips survive on infected plants and then transmit virus to other plants within a field.
As the onions’ canopy develops and leaves start folding over one another, be sure to use sufficient spray volumes and pressure to get insecticides down in the neck of plants. This week some I saw some recently sprayed fields that had dead thrips several inches up on the leaves but still had live ones in the neck at the base of leaves.
The Malheur Experiment Station Annual Farm Fest will be July 10, beginning at 8 AM with drone demonstrations followed by research tours and kids’ activities. ODA Director Alexis Taylor will be our special guest speaker at lunch. She will be there with other ODA representatives, including Susanna Pearlstein, ODA’s Produce Safety Program Manager, and Casey Prentiss. Please call 541-889-2174 to RSVP.
Figure 1. IYSV on leaves 2019-06-28
Adults per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29
Oregon Slope/Weiser 0.03 0.04 0.06 0.15 2.47 4.41 5.22
Vale 0.15 0.55 1.64 2.60 4.79 6.44 5.72
Ontario 0.07 0.03 0.78 0.71 1.92 4.35 5.98
Nyssa 0.02 0.07 1.32 1.03 3.67 5.20 7.33
Adrian 0.02 0.22 1.60 1.67 2.15 2.63 7.60
Fruitland 0.05 0.03 0.19 0.94 1.29 6.12 6.30
Parma - 0.09 1.60 0.67 2.75 7.89 3.47
Overall Average 0.06 0.15 1.03 1.11 2.72 5.29 5.95
Immatures per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29
Oregon Slope/Weiser 0.00 0.00 0.00 0.26 5.45 12.55 9.90
Vale 0.00 0.41 6.28 4.20 11.16 5.99 11.64
Ontario 0.00 0.00 3.60 1.71 8.71 22.81 21.28
Nyssa 0.00 0.02 3.56 5.52 8.00 10.58 26.98
Adrian 0.00 0.00 8.42 3.64 5.45 1.10 5.17
Fruitland 0.00 0.00 0.16 2.20 3.39 7.62 1.55
Parma - 0.00 1.97 4.37 1.66 2.90 12.78
Overall Average 0.00 0.06 3.43 3.13 6.26 9.08 12.76
Total average per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29
Oregon Slope/Weiser 0.03 0.04 0.06 0.42 7.92 16.96 15.12
Vale 0.15 0.96 7.92 6.79 15.96 12.43 17.36
Ontario 0.07 0.03 4.38 2.42 10.63 27.16 27.26
Nyssa 0.02 0.09 4.88 6.55 11.67 15.78 34.31
Adrian 0.02 0.22 10.01 5.31 7.61 3.73 12.77
Fruitland 0.05 0.03 0.35 3.14 4.68 13.74 7.85
Parma - 0.09 3.58 5.03 4.41 10.79 16.25
Overall Average 0.06 0.21 4.45 4.24 8.98 14.37 18.70
% Plants with Thrips
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29
Oregon Slope/Weiser 0% 4% 6% 14% 68% 81% 93%
Vale 0% 31% 64% 54% 81% 83% 76%
Ontario 0% 3% 34% 35% 73% 89% 96%
Nyssa 0% 5% 73% 56% 70% 87% 97%
Adrian 0% 19% 57% 53% 70% 86% 98%
Fruitland 0% 3% 17% 50% 54% 94% 100%
Parma 0% 7% 54% 41% 89% 84% 74%
Overall Average 0% 10% 43% 43% 72% 86% 91%
IYSV Incidence (% plants with lesions)
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22 6/29
Oregon Slope/Weiser 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Vale 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Ontario 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.9%
Nyssa 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.1%
Adrian 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Fruitland 0.0% 0.0% 0.0% 0.0% 0.0% 0.2% 9.4%
Parma 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Overall Average 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 1.5%
2019 Potato psyllid monitoring program in Idaho
Potato All Locations
potato psyllid
Posted on: June 28, 2019 by Erik Wenninger
The University of Idaho, in collaboration with crop consultants across the state, will continue our monitoring program for potato psyllids, zebra chip disease, and liberibacter (Lso), the bacterium associated with zebra chip. The monitoring program covers commercial potato fields throughout southern Idaho and is funded in part by the Idaho Potato Commission, USDA, and generous in-kind contributions by our collaborators.
Following recommendations from our ZC Advisory Committee last year, we are shortening the duration of the program. We still plan to monitor about 100 fields across the state, but only with 4 sticky traps per field rather than the more intense sampling that was conducted on some fields in the past.
The first official deployment of sticky traps for the program will occur next week. However, following earlier than usual observation of potato psyllids in Oregon, we began deploying traps on a limited basis over the last three weeks. During the week of June 10, we captured 22 potato psyllids across six fields in Canyon County and one psyllid in a field in Payette County. During the week of June 17, we captured one psyllid in each of two fields in Canyon County and three psyllids across two fields in Payette County. We have yet to observe potato psyllids in Twin Falls County after three weeks of monitoring in a few fields. Over the last two weeks, we found psyllids in 8 of 12 fields (67%) and 4 of 23 fields (17%) being monitored, respectively.
It should be noted that observation of potato psyllids in Idaho during June is not at all unexpected. We typically would find our first psyllids during mid-May.
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://www.uidaho.edu/cals/potatoes/news/psyllid-management
» http://www.uidaho.edu/cals/potatoes/news/psyllid-management
Marketing Class available for East Idaho Growers
All Crops Eastern Idaho
Posted on: June 28, 2019 by Juliet Marshall
The University of Idaho Extension and Lee Andersen from Ririe Grain is offering a workshop for anyone wanting to learn the basics of the futures market and utilizing it in your grain marketing. Topics will include:
Basics of the Futures Market
Hedging Strategies
Using Options
Charting Techniques
Order Types
Location & Time:
Rigby Courthouse Annex Building Upstairs Meeting Room
210 Courthouse Way – July 2nd
Classes are from 1:00 to 4:00 p.m.
Cost: Free
For Questions Call: or Email Madison County Extension Office (208) 716-5602, Jon Hogge jhogge@uidaho.edu
Cercospora leaf spot in Sugarbeets - 2019
Sugarbeets All Locations
Cercospora leaf spot
Posted on: June 28, 2019 by Jerry Neufeld
Cercospora leaf spot has been found by The Amalgamated Sugar Company in fields near eastern Oregon, Treasure Valley, western Magic Valley. Incidence is low and likely does not warrant treatment yet. However, when inoculum is present, infection will progress with warmer temperatures and increased irrigation and relative humidity. There are several fungicides available for use to treat Cercospora leaf spot, but be aware of multiple fungicide resistant strains of Cercospora. Depending on the disease pressure and chemistry used, applications with different chemistries should be repeated every 14-21 days.
Contact your crop consultant from the Amalgamated Sugar Company to discuss suitable fungicides for your area, to report a loss of fungicide efficacy, or if you have any questions.
Click on the link below for the Cercospora leaf spot pages in the PNW Plant Disease Management Handbooks.
» https://pnwhandbooks.org/plantdisease/host-disease/sugar-beet-beta-vulgaris-cercospora-leaf-spot
Powdery Mildew in Sugarbeets - 2019
Sugarbeets All Locations
Powdery Mildew
Posted on: June 27, 2019 by Jerry Neufeld
Powdery mildew has been found by The Amalgamated Sugar Company Crop Consultants in fields near Adrian, Oregon and western Idaho. There are several fungicides available for use to treat powdery mildew. Depending on the disease pressure and chemistry used, applications with different chemistries should be repeated every 14-21 days. Contact your crop consultant from the Amalgamated Sugar Company if you have any questions.
Click on the link below for the powdery mildew pages in the PNW Plant Disease Management Handbooks.
» https://pnwhandbooks.org/plantdisease/host-disease/sugar-beet-beta-vulgaris-powdery-mildew
UI Ag Talk Tuesday July 2 at 8:00 AM at the Idaho AgCredit Rexburg branch
All Crops All Locations
Posted on: June 27, 2019 by Kasia Duellman
Reminder: The next UI Ag Talk Tuesday will be hosted in Rexburg July 2 at the Idaho AgCredit Rexburg branch, 1586 N. 2nd E., at 8:00 AM.
Join UI Researchers, Extension Personnel, and ag professionals to learn about timely topics in ag production. For this next session on July 2, Jon Hogge will update us on the latest thrips investigations and cereal diseases. Other topics may include potato diseases, weed issues, and other crop challenges currently being faced.
These events are offered on the first and third Tuesdays at 8AM throughout the growing season at different locations in eastern Idaho. Breakfast beverages (coffee, juice) and light breakfast fare (e.g., pastries/donuts/fruits) will be provided. Venue and location differs, so look for the announcements via Treasure Valley Pest Alerts and on the UI Extension Calendar.
» https://webpages.uidaho.edu/extension-seed-potato/ATT.html
UI Dryland Cereals Field Day - THURSDAY June 27th
Small Grains All Locations
Cereal Field Days - Update on varieties, diseases (stripe rust, foot rots, frost damage, etc)
Posted on: June 25, 2019 by Juliet Marshall
Join us for our first field day of the season! (South Eastern Idaho Extension and Wheat Breeding Trials). Catch up on the latest varieties, see the new releases from the UI Wheat breeding program based in Aberdeen and join the discussion on the latest diseases and issues in cereals. Looking forward to seeing you at one of our field days!
June 27, 2019 - THURSDAY
Rockland / Arbon
9:30 AM Rockland, West of Rock Creek Rd on Deeg Rd, Rockland, ID
2:00 PM Arbon on Mink Creek Road, Arbon, ID
» https://www.uidaho.edu/extension/cereals/scseidaho
» UI_Extension_2019_Cereals_Field_Days_For_Southern_Eastern_ID.pdf
Onion Thrips update 6/22/2019
Onion Treasure Valley
Onion thrips
Posted on: June 22, 2019 by Stuart Reitz
Below are the monitoring results for this week. Fields were checked Thursday afternoon, Friday, and a few Saturday morning. There are 7 – 10 fields in each area.
Not surprisingly, there’s been a sharp increase in thrips in some areas. In other areas, numbers have held fairly steady. Some of the difference reflects where people are with their insecticide programs. For example, fields that have already received a second Movento application tend to have few immatures. Some of those that haven’t or just had a recent application tend to have more immatures and a higher proportion of immatures relative to adults. One way to see when the residual effect of Movento is declining is to see if the proportion of immatures is increasing.
I did find two Iris yellow spot infected plants this week so be on the lookout for it.
Despite a couple of brisk days this week, the degree days for June have been about the same as last year. For the season, 2019 is a couple of days behind 2018 but still a few days ahead of the historic average.
Adults per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22
Oregon Slope/Weiser 0.03 0.04 0.06 0.15 2.47 4.41
Vale 0.15 0.55 1.64 2.60 4.79 6.44
Ontario 0.07 0.03 0.78 0.71 1.92 4.35
Nyssa 0.02 0.07 1.32 1.03 3.67 5.20
Adrian 0.02 0.22 1.60 1.67 2.15 2.63
Fruitland 0.05 0.03 0.19 0.94 1.29 6.12
Parma - 0.09 1.60 0.67 2.75 7.89
Overall Average 0.06 0.15 1.03 1.11 2.72 5.29
Immatures per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22
Oregon Slope/Weiser 0.00 0.00 0.00 0.26 5.45 12.55
Vale 0.00 0.41 6.28 4.20 11.16 5.99
Ontario 0.00 0.00 3.60 1.71 8.71 22.81
Nyssa 0.00 0.02 3.56 5.52 8.00 10.58
Adrian 0.00 0.00 8.42 3.64 5.45 1.10
Fruitland 0.00 0.00 0.16 2.20 3.39 7.62
Parma - 0.00 1.97 4.37 1.66 2.90
Overall Average 0.00 0.06 3.43 3.13 6.26 9.08
Total average per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22
Oregon Slope/Weiser 0.03 0.04 0.06 0.42 7.92 16.96
Vale 0.15 0.96 7.92 6.79 15.96 12.43
Ontario 0.07 0.03 4.38 2.42 10.63 27.16
Nyssa 0.02 0.09 4.88 6.55 11.67 15.78
Adrian 0.02 0.22 10.01 5.31 7.61 3.73
Fruitland 0.05 0.03 0.35 3.14 4.68 13.74
Parma - 0.09 3.58 5.03 4.41 10.79
Overall Average 0.06 0.21 4.45 4.24 8.98 14.37
% Plants with Thrips
Growing Area 5/15 5/25 5/31 6/8 6/15 6/22
Oregon Slope/Weiser 0% 4% 6% 14% 68% 81%
Vale 0% 31% 64% 54% 81% 83%
Ontario 0% 3% 34% 35% 73% 89%
Nyssa 0% 5% 73% 56% 70% 87%
Adrian 0% 19% 57% 53% 70% 86%
Fruitland 0% 3% 17% 50% 54% 94%
Parma 0% 7% 54% 41% 89% 84%
Overall Average 0% 10% 43% 43% 72% 86%
Onion Thrips update 6/15/2019
Onion Treasure Valley
Onion thrips
Posted on: June 16, 2019 by Stuart Reitz
With the warmer weather, thrips numbers continue to increase around the valley, with a greater and greater proportion of plants having thrips on them. The sharp increase in abundance in the Slope / Weiser area are from fields that had not been sprayed yet. Similar increases in other areas reflect fields where counts were taken ahead of an insecticide treatment. Keep in mind that adults continue to come into fields from outside sources so their numbers rebound soon after insecticide applications followed by increases in the immatures. Monitoring fields can help you prioritize and schedule fields for applications.
We have not observed Iris yellow spot virus yet in this season’s crop.
Adults per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15
Oregon Slope/Weiser 0.03 0.04 0.06 0.15 2.47
Vale 0.15 0.55 1.64 2.60 4.79
Ontario 0.07 0.03 0.78 0.71 1.92
Nyssa 0.02 0.07 1.32 1.03 3.67
Adrian 0.02 0.22 1.60 1.67 2.15
Fruitland 0.05 0.03 0.19 0.94 1.29
Parma - 0.09 1.60 0.67 2.75
Overall Average 0.06 0.15 1.03 1.11 2.72
Immatures per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15
Oregon Slope/Weiser 0.00 0.00 0.00 0.26 5.45
Vale 0.00 0.41 6.28 4.20 11.16
Ontario 0.00 0.00 3.60 1.71 8.71
Nyssa 0.00 0.02 3.56 5.52 8.00
Adrian 0.00 0.00 8.42 3.64 5.45
Fruitland 0.00 0.00 0.16 2.20 3.39
Parma - 0.00 1.97 4.37 1.66
Overall Average 0.00 0.06 3.43 3.13 6.26
Total average per Plant
Growing Area 5/15 5/25 5/31 6/8 6/15
Oregon Slope/Weiser 0.03 0.04 0.06 0.42 7.92
Vale 0.15 0.96 7.92 6.79 15.96
Ontario 0.07 0.03 4.38 2.42 10.63
Nyssa 0.02 0.09 4.88 6.55 11.67
Adrian 0.02 0.22 10.01 5.31 7.61
Fruitland 0.05 0.03 0.35 3.14 4.68
Parma - 0.09 3.58 5.03 4.41
Overall Average 0.06 0.21 4.45 4.24 8.98
% Plants with Thrips
Growing Area 5/15 5/25 5/31 6/8 6/15
Oregon Slope/Weiser 0% 4% 6% 14% 68%
Vale 0% 31% 64% 54% 81%
Ontario 0% 3% 34% 35% 73%
Nyssa 0% 5% 73% 56% 70%
Adrian 0% 19% 57% 53% 70%
Fruitland 0% 3% 17% 50% 54%
Parma 0% 7% 54% 41% 89%
Overall Average 0% 10% 43% 43% 72%
Potato Psyllids in the Treasure Valley
Potato Treasure Valley
Posted on: June 14, 2019 by Stuart Reitz
Potato psyllids detected in the Treasure Valley.
The potato pest monitoring network in Malheur County found potato psyllids in 45% of checked fields last week (Traps were placed May 31 and collected June 7). A total of 21 psyllids were collected this past week from the 20 fields currently in the monitoring network. The psyllids will be tested for the Zebra Chip bacterium.
For information on psyllid and other pest management in potatoes, please see the 2019 Integrated Pest Management Guidelines for Insects and Mites in Idaho, Oregon and Washington Potatoes, available at http://www.nwpotatoresearch.com/pest-library/pest-management-options/.
» http://www.nwpotatoresearch.com/pest-library/pest-management-options/
Potato herbicide solubility and effects - Spring 2019
Potato All Locations
Posted on: June 12, 2019 by Pamela Hutchinson
Rainfall across southern Idaho this spring has been unusually high in some areas and potato herbicides may have been or are being affected. Soluble herbicides can move downward in soil profile. Availability of herbicides for uptake can increase. What is happening with your potato herbicides and why? What is happening to your weeds and potatoes and why?
» Potato_herbicide_solubility_and_movement_-_Spring_2019.pdf
Stripe rust in wheat continues to spread
Small Grains All Locations
Stripe rust
Posted on: June 11, 2019 by Juliet Marshall
Stripe rust is at low levels or can’t be found in most winter wheat fields except on the susceptible varieties including soft white winter wheat Brundage. Stripe rust is not yet present in spring wheat fields, but I suspect it will be found shortly. Susceptible and moderately susceptible spring wheat varieties should be treated with fungicides at herbicide timing (which may have already passed for many fields). With the weather very favorable for spread and infection, disease pressure in spring wheat will reduce yields and test weight in susceptible varieties!
Winter grain is heading (finishing in the Magic Valley area, mid-heading in south-Eastern Idaho (Aberdeen area), and starting to head in the Idaho Falls area). Diseases that are prevalent include Pythium, Rhizoctonia and straw breaker foot-rot. Stripe rust has been confirmed east of American Falls near the Arbon Valley exit, near the American Falls airport, Aberdeen area on-station and in production fields. Stripe rust is also present in Notus, ID area and Logan, UT. Also found in the Firth area was powdery mildew. Control recommendations for powdery mildew includes propiconazole as well as many other fungicides labeled as good to very good control. (See the fungicide efficacy chart on my website for fungicide efficacy against many of the common wheat diseases).
Ag Talk Tuesday - the latest UI Ag Talk Report
All Crops All Locations
Regional Crop Diseases
Posted on: June 11, 2019 by Juliet Marshall
Here’s what you missed at the June 4 Ag Talk Tuesday in American Falls… and other Hot Topics (See attached PDF):
NEW CALL-IN NUMBER FOR AG TALK TUESDAY SESSIONS
Have instant access to UI ag faculty and other attendees remotely during the Ag Talk Tuesday sessions. You can simply call a phone number to join the meeting, or you can click on the Zoom link below (the needed software will automatically download when you start or join your first Zoom meeting) to ask any questions you have or to share your observations with how crops are progressing and what current issues appear to be in your region.
The next Ag Talk Tuesday will be held 8:00 AM July 2 in Rexburg at Idaho AgCredit, 1586 North 2nd East.
Call-in Number: (669) 900-6833
Meeting ID: 349427773
(Optional) Zoom link: https://uidaho.zoom.us/j/349427773
Onion Thrips update 6/8/2019
All Crops All Locations
Onion thrips
Posted on: June 10, 2019 by Stuart Reitz
Hello Everyone,
There hasn’t been a tremendous increase in thrips abundance this week as insecticide programs are ramping up. The rain and wind has also helped to slow population build up. (Thrips tend not to fly in windy conditions and rain can drown or wash them off plants). Fields were checked this week in between thunderstorms on Thursday and Friday and couple on Saturday.
Highest numbers again were in larger early season varieties and in reds. The highest numbers I saw on individual plants ranged from 50 – 90 thrips. Still, those numbers have been sporadic. Other plants within the same field had as few as 1 and nearby fields with smaller plants may have few if any thrips. The bottom line is to check as many plants as possible when scouting your fields.
I have not seen any plants infected with Iris yellow spot virus (yet). Pink root symptoms have been showing up in some red onion fields. At this point, reducing stress on plants (e.g. good irrigation practices) is the best way to limit the impact of the disease.
Adults per Plant
Growing Area 5/15 5/25 5/31 6/8
Oregon Slope/Weiser 0.03 0.04 0.06 0.15
Vale 0.15 0.55 1.64 2.60
Ontario 0.07 0.03 0.78 0.71
Nyssa 0.02 0.07 1.32 1.03
Adrian 0.02 0.22 1.60 1.67
Fruitland 0.05 0.03 0.19 0.94
Parma - 0.09 1.60 0.67
Overall Average 0.06 0.15 1.03 1.11
Immatures per Plant
Growing Area 5/15 5/25 5/31 6/8
Oregon Slope/Weiser 0.00 0.00 0.00 0.26
Vale 0.00 0.41 6.28 4.20
Ontario 0.00 0.00 3.60 1.71
Nyssa 0.00 0.02 3.56 5.52
Adrian 0.00 0.00 8.42 3.64
Fruitland 0.00 0.00 0.16 2.20
Parma - 0.00 1.97 4.37
Overall Average 0.00 0.06 3.43 3.13
Total average per Plant
Growing Area 5/15 5/25 5/31 6/8
Oregon Slope/Weiser 0.03 0.04 0.06 0.42
Vale 0.15 0.96 7.92 6.79
Ontario 0.07 0.03 4.38 2.42
Nyssa 0.02 0.09 4.88 6.55
Adrian 0.02 0.22 10.01 5.31
Fruitland 0.05 0.03 0.35 3.14
Parma - 0.09 3.58 5.03
Overall Average 0.06 0.21 4.45 4.24
% Plants with Thrips
Growing Area 5/15 5/25 5/31 6/8
Oregon Slope/Weiser 0% 4% 6% 14%
Vale 0% 31% 64% 54%
Ontario 0% 3% 34% 35%
Nyssa 0% 5% 73% 56%
Adrian 0% 19% 57% 53%
Fruitland 0% 3% 17% 50%
Parma 0% 7% 54% 41%
Overall Average 0% 10% 43% 43%
As always, please let me know if you have any questions.
**********************************************
Stuart Reitz
Malheur Experiment Station
Oregon State University
595 Onion Ave.
Ontario, OR 97914
Office: 541-889-2174
Mobile: 208-740-4381
stuart.reitz@oregonstate.edu
**********************************************
Ag Talk Tuesday - American Falls, 8:00 AM June 4, at Idaho AgCredit
All Crops All Locations
Ag Talk Tuesday
Posted on: June 3, 2019 by Juliet Marshall
Good afternoon! We will be having the next ATT meeting tomorrow morning at 8:00 AM at the Idaho AgCredit Office, 2883 ID-39, American Falls, ID.
New Call-in number for Ag Talk Tuesday sessions:
Have instant access to UI ag faculty and other attendees remotely during the Ag Talk Tuesday sessions. You can simply call a phone number to join the meeting, or you can click on the Zoom link below (the needed software will automatically download when you start or join your first Zoom meeting) to ask any questions you have or to share your observations with how crops are progressing and what current issues appear to be in your region.
Call-in: (669) 900-6833
Zoom link: https://uidaho.zoom.us/j/349427773
Attached is the summary of the last ATT discussion - what we are calling the Ag Talk Report.
Date Location Primary Topics
Hosts
June 4
Idaho AgCredit
2883 ID-39
American Falls
Early season potato issues, stand issues
Weed issues
Grain Issues
Kasia Duellman
Pam Hutchinson
Juliet Marshall
2019 Snake River Weed Research Tour, Ontario, OR
All Crops All Locations
Posted on: June 3, 2019 by Jerry Neufeld
Please mark your calendar for the 2019 Snake River Weed Research Tour
Venue: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
Date: Thursday, June 13, 2019
Registration starts at 8:00am with coffee and donuts.
Recertification credits: 3 credits – Oregon and 3 credits – Idaho for full tour attendees.
The tour will start promptly at 8:30AM and end at 12:15PM.
A complementary lunch will be served at the conclusion of the tour.
The tour will feature research studies for weed management in direct-seeded onion, sugar beet, field corn, potato, and wheat. The first stop will be at our yellow nutsedge “field laboratory” along OR Hwy 201 just after crossing the rail tracks (if headed south to Nyssa from Ontario). The stop along Hwy 201 will feature studies on yellow nutsedge control in onion, sugar beet, and field corn. We will then proceed to the station and tour studies on weed control in direct-seeded onion, field corn, potato, and wheat.
This event is open to the public. Please forward the invitation to anybody who will be interested in weed management in the mentioned crops.
We will follow up with a reminder as we get close to the tour date. We are looking forward to seeing you at the tour.
Please call 541-889-2174 or email janet.jones@oregonstate.edu if you need more information.
Kind regards,
Joel Felix
Onion Thrips update
Onion Treasure Valley
Onion thrips
Posted on: June 1, 2019 by Stuart Reitz
We had a sharp increase in thrips numbers in most areas over the past week. Fields were checked on Thursday and Friday (5/30 – 5/31). Thrips were in 90% of the fields checked this week and are being found on more plants per field now. The overall increase was largely a result of thrips beginning to reproduce in fields (as marked by the increase in immature thrips). Numbers tend to be higher in fields with larger plants. The highest numbers have been in red onion fields with plants at the 4-5 leaf stage and in early onion fields (e.g. Spanish Medallion and other early varieties). The highest numbers in the network were about 32 per plant in a red onion field (about 85% being immatures). The lowest numbers have been in fields at the 1-2 leaf stage, especially those in the Oregon Slope/Weiser area.
Expect additional movement of thrips into onion fields as more alfalfa fields get their first cutting and as rangeland weeds begin to dry down and senesce. Populations will increase rapidly with the warmer, drier weather in the forecast.
Adults per Plant
Growing Area 5/15 5/25 5/31
Oregon Slope/Weiser 0.03 0.04 0.06
Vale 0.15 0.55 1.64
Ontario 0.07 0.03 0.78
Nyssa 0.02 0.07 1.32
Adrian 0.02 0.22 1.60
Fruitland 0.05 0.03 0.19
Parma - 0.09 1.60
Overall Average 0.06 0.15 1.03
Immatures per Plant
Growing Area 5/15 5/25 5/31
Oregon Slope/Weiser 0.00 0.00 0.00
Vale 0.00 0.41 6.28
Ontario 0.00 0.00 3.60
Nyssa 0.00 0.02 3.56
Adrian 0.00 0.00 8.42
Fruitland 0.00 0.00 0.16
Parma - 0.00 1.97
Overall Average 0.00 0.06 3.43
Total average per Plant
Growing Area 5/15 5/25 5/31
Oregon Slope/Weiser 0.03 0.04 0.06
Vale 0.15 0.96 7.92
Ontario 0.07 0.03 4.38
Nyssa 0.02 0.09 4.88
Adrian 0.02 0.22 10.01
Fruitland 0.05 0.03 0.35
Parma - 0.09 3.58
Overall Average 0.06 0.21 4.45
% Plants with Thrips
Growing Area 5/15/2019 5/25/2019 5/31/2019
Oregon Slope/Weiser 3% 4% 6%
Vale 15% 31% 64%
Ontario 7% 3% 34%
Nyssa 2% 5% 73%
Adrian 2% 19% 57%
Fruitland 5% 3% 17%
Parma - 7% 54%
Overall Average 6% 10% 43%
A couple of notes unrelated to onion thrips
1 – As a result of the cool, wet spring, downy mildew has shown up in some overwinter onions in the Columbia Basin. I haven’t seen signs of it in the Treasure Valley, but it’s worth keeping an eye out for it. Even with the wet weather, I don’t think the bulb crop is at high risk since the crop is relatively small and doesn’t have a dense canopy yet that keeps moisture levels high on the leaves. It could be a greater risk for seed crops that have a denser canopy now. Please let me know if you have concerns about it in your fields.
Thanks to Carrie Wohleb and Lindsey du Toit for the pictures of downy mildew on onion foliage and flower scapes.
2 – if you have sugarbeets, there have been reports of leafminer and armyworms in beet fields.
3 –June 13 2019: Snake River Weed Research Tour, Malheur Experiment Station, 595 Onion Ave, Ontario, OR, beginning at 8:30 AM
http://www.cropinfo.net/events.php
sugarbeet leafminer and armyworm
Sugarbeets Treasure Valley
leafminer and armyworm
Posted on: May 31, 2019 by Jerry Neufeld
The Amalgamated Sugar Company crop consultants are reporting that pockets of leaf miner and army worm are starting to pop up around various locations in Treasure Valley sugarbeet fields. The links below from the Pacific Northwest Insect Management Handbook describe the damage and also show the damage these pests cause. Please contact your Amalgamated Sugar crop consultant for more details and treatment options.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-leafminer
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-armyworm
Annual University of Idaho Snake River Weed Management Tour - June 25th - Aberdeen R&E Center
Potato All Locations
Posted on: May 30, 2019 by Pam Hutchinson
Greetings;
Please mark your calendars and plan to attend the UI Snake River Pest Management Tour at the Aberdeen R&E Center on Tuesday June 25th.
Time: 8:30 to noon followed by a sponsored lunch.
Credits: Three Idaho pesticide applicator recertification credits will be offered.
Featured will be several weed control trials in potatoes, including tank mixtures, planned vs. rescue postemergence applications, chemigation vs sprinkler incorporation as well as potato variety herbicide tolerance trials, herbicide mechanism of action plots, and Litchi tomato herbicide management.
We hope to see you there.
Thanks,
Pam
p.s. This tour was originally scheduled for June 18th but due to cold rainy conditions, our potato and weed emergence has been slowed considerably
There will be no Snake River Tour at the Kimberly R&E Center this year – we plan to fire it up again in 2020!
Stripe rust in winter wheat and Spot form of net blotch in barley (SFNB)
Small Grains All Locations
stripe rust and spot form of net blotch
Posted on: May 29, 2019 by Juliet Marshall
Stripe rust has been found today in winter wheat east of American Falls. Lesions were found on leaf tips in the upper canopy of the soft white winter wheat variety …. Wait for it……
…. Brundage.
This is likely a spring infection (not overwintering) and not widespread. Yet. With current weather conditions (perfect for stripe rust infection) expect to see the disease spread rapidly. If you have susceptible winter wheat varieties (see the UI Extension Small Grains Reports and the USDA Dr. Xianming Chen’s USDA reports for variety ratings) or susceptible spring wheat varieties, timely application of fungicides should protect vulnerable fields. Fungicide mixed with herbicide applications is recommended for susceptible spring wheat varieties as well.
Please see the attached file for the fungicide efficacy of fungicides for many diseases.
PLEASE report stripe rust occurrences ASAP to me.
Also found were symptoms of spot form of net blotch (SFNB) in spring barley. This field was in barley after barley. Fungicide with herbicide should reduce SFNB impact and stop the spread into the upper canopy.
