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Big Week next week for University of Idaho Extension Cereal Field Days!
All Crops Eastern Idaho
Cereals
Posted on: July 12, 2019 by Juliet Marshall
Get the best, latest information on cereal production and varieties for your area.
Aberdeen Collaborative Field Day next Wednesday morning! Researchers, results, food and door prizes - please come and bring a friend!
Ashton Spring Cereals Field Day next Thursday morning!
Idaho Falls Spring Cereals Field Day next Thursday afternoon!
Earwigs Everywhere
Landscape and Garden Treasure Valley
Forficula auricularia
Posted on: July 12, 2019 by Maria Held
Garden plants commonly injured by earwigs include annual flowers (especially marigolds, dahlias and zinnias), herbs (especially basil), roses, raspberries, strawberries, apricots, peaches, sweet corn tassels and silks. Because earwigs are beneficial due to their predaceous and decomposer feeding habits, they should only be controlled when causing harm. Earwigs are nocturnal. If chewing injury to plants is apparent but no culprit can be found during the day, check the plants at night with a flashlight. If shiny, slime trails are present, snails or slugs are the culprit rather than earwigs. Trapping is an effective way to control the population.
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
Squash Bugs are here!
Landscape and Garden Treasure Valley - Idaho
Anasa tristis
Posted on: June 27, 2019 by Maria Held
Squash bugs and eggs have been found yesterday at the IPM scouting walk at Idaho Veterans Garden in Caldwell. The insects affect cucurbits and vine crops sucking sap from the plants. Check the underside of leaves for egg masses and destroy them. The adults are hard to control. Always follow label instructions.
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%
Peach Twig Borer 2019
Landscape and Garden Treasure Valley
Peach Twig Borer Anarsia lineatella
Posted on: June 17, 2019 by Maria Held
Peach twig borers have been found in a trap in the Payette area. Peach twig borer is the “worm in the peach”.
Peach twig borer larvae prefer to bore into succulent twigs. Later in the season, when twigs become hardened off and unpalatable, larvae feed inside the fruit.
» http://treefruit.wsu.edu/crop-protection/opm/peach-twig-borer/
» https://utahpests.usu.edu/slideshows/ppt/05sh-insects-ptbcontrol.pdf
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
**********************************************
Squoia Pitch Moth
Landscape and Garden Treasure Valley
Synanthedon sequoiae
Posted on: June 6, 2019 by Maria Held
Spitch moth has been found in traps.
The sequoia pitch moth (SMP) is the primary insect that causes large pitch (resin) masses on Austrian, Scotch and other ornamental pines.
SPM is not typically considered a serious pest of pines, but may cause limb dieback, unsightly resin masses, tree stress or tree death in severe cases.
There are no recommended insecticide control options for SPM.
SPM should be managed using cultural controls such as removing resin masses and larvae, proper timing of pruning, eliminating mechanical damage and proper irrigation. Avoid pruning/injuring trees April through August.
» http://ipm.ucanr.edu/PMG/PESTNOTES/pn7479.html
» https://utahpests.usu.edu/ipm/ornamental-pest-guide/arthropods/wood-borers/sequoia-pitch-moth
Western Cherry Fruit Fly 2019 Update
Cherry Treasure Valley
Western Cherry Fruit Fly WCFF
Posted on: June 5, 2019 by Paul Castrovillo
On May 29 the first 2019 Western Cherry Fruit Fly captured in an Idaho State Department of Agriculture WCFF trap was reported from Canyon County. Historically we expect to find WCFF in Gem County about a week after the first one is found in Canyon County.
Online phenology and degree-day models for WCFF predicted first flight on May 26 in Emmett, May 28 in Ontario, Parma and Boise and May 29 in Caldwell and Nampa.
If treatment for WCFF is not already underway it should begin now.
