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Late blight found in southwestern Minidoka County
Potato All Locations
Late Blight
Posted on: August 19, 2019 by Jeff Miller
Late blight has been found in southwest Minidoka County near the town of Paul in multiple potato fields. Late blight sporulation was observed on diseased tissue. The University of Idaho will be checking for additional confirmation by PCR.
Weather conditions are not favorable for pathogen spread, but the blight is extensive in some of these fields. Risk of spread would be very high if thunderstorms develop. It is recommended that growers maintain an effective fungicide program to protect against late blight. Additional information on late blight fungicides can be found at the website below. The article was written in 2018, but the information is still applicable for this year.
Miller Research is interested in mapping the extent and severity of the blight. If you find late blight, please let us know. Locations will be kept confidential.
Tomato Fruit Issues
Landscape and Garden All Locations
Posted on: August 19, 2019 by Maria Held
Are you experiencing issues with you tomato fruit like blossom end rot, catfacing, splitting, zippering and such? Below are some links to help you determine what is going on with your tomatoes. Remember that variety selection and consistent watering are important in preventing some of these problems.
» http://vegetablemdonline.ppath.cornell.edu/NewsArticles/Tom_ComDis.htm
» http://blogs.cornell.edu/livegpath/gallery/tomato/zippering-fruit-disorder-on-tomatoes
» http://blogs.cornell.edu/livegpath/gallery/tomato/thrips-and-their-feeding-injury/
» http://blogs.cornell.edu/livegpath/gallery/tomato/feeding-injury-caused-by-stink-bugs/
First call for topics for the 2020 Idaho Potato Conference
Potato All Locations
Posted on: August 19, 2019 by Jerry Neufeld
This the first call for topics for the 2020 Idaho Potato Conference that will take place in Pocatello on January 22nd and 23rd. Please provide your ideas for potential workshops and presentations for this year's conference to Kasia Duellman (kduellman@uidaho.edu), Nora Oslen (norao@uidaho.edu) or Mike Thornton (miket@uidaho.edu) by September 16th so that we can put together a preliminary list for a program planning meeting. Please also take the time to survey your stakeholders for any input and indicate whether you would be interested and willing to present a workshop or seminar.
Thank you, and we look forward to seeing your responses.
Sincerely,
Kasia Duellman, Nora Olsen and Mike Thornton
Co-Chairs 2020 UI Potato Conference
UI Ag Talk Tuesday August 20 at 8:00AM in Rupert
All Crops All Locations
General announcment
Posted on: August 16, 2019 by Kasia Duellman
Join us for the last scheduled UI Ag Talk Tuesday of 2019 on Tuesday, August 20 at 8:00 AM at the University of Idaho Minnidoka County Extension Office (85 E Baseline Rd, Rupert, ID).
Invited Speakers:
Jason Thomas - Utilizing Barn Owl Boxes to Manage Voles
Steve Hines - Cover Crops
Other Topics are determined by YOU. Interaction and input from all attendees are welcomed and encouraged.
You can join in person, or by phone by dialing the following number and meeting ID:
Call-in Number: (669) 900-6833
Meeting ID: 349427773
You can also join the meeting by using Zoom on your computer:
Zoom link: https://uidaho.zoom.us/j/349427773
2019 Organizers: Kasia Duellman (kduellman@uidaho.edu), Pam Hutchinson (phutch@uidaho.edu), and Juliet Marshall (jmarshall@uidaho.edu)
Previous newsletters related to these sessions are available here: https://webpages.uidaho.edu/extension-seed-potato/ATT.html
August 15, 2019 Psyllid Monitoring Update
Potato All Locations
Potato Psyllid
Posted on: August 15, 2019 by Lucy Standley
This week we had traps deployed in 76 of the 79 fields (96.2%) monitored this year, and we found a total of 55 psyllids across 24 (30.4%) of the 79 monitored fields. One of the 79 total fields that we were sampling has been vine-killed.
Psyllids were collected on sticky traps in potato in the following counties: Payette (2 fields), Canyon (11 fields), Owyhee (1 field), Elmore (1 field), Gooding (1 field), Twin Falls (5 fields), Jerome (1 field), Cassia (1 field) and, Minidoka (1 field).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Overall psyllid captures have remained relatively steady over the last few weeks. However, we continue to urge growers to maintain their IPM programs.
“Heat maps” of this week’s results can be found on the UI and WSU websites linked below. We continue to observe a “hot spot” in the western Treasure Valley.
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.
--WSU site: https://potatoes.decisionaid.systems/idaho
» http://www.uidaho.edu/cals/potatoes/news
Corn Earworm Counts - 8/14/19
Corn Treasure Valley
corn earworm
Posted on: August 14, 2019 by Jerry Neufeld
Click on the pdf below to see the corn earworm counts taken this morning. It appears there are still CEW moths in the valley; however, the threat of damage should be getting smaller since the CEW moths lay eggs in fresh silk, and there is less and less fresh silk around each day.
Malheur Experiment Station Onion Variety Day August 27
All Crops All Locations
Posted on: August 14, 2019 by Janet Jones
You are invited to the Malheur Experiment Station Onion Variety Day!
Place: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
in the field off Onion Avenue under the canopy.
Date: Tuesday, August 27, 2019
Registration starts at 9:00am with donuts and refreshments in the onion field.
A complimentary lunch will be served at noon in the barn.
Click on the PDF below for the Flyer.
Please RSVP for lunch or if you need more information call
Jan Jones at (541) 889-2174 or email janet.jones@oregonstate.edu.
August 8, 2019 First psyllid in eastern Idaho this year
Potato All Locations
Potato Psyllid
Posted on: August 8, 2019 by Lucy Standley
This week we had traps deployed in 78 of the 79 fields (98.7%) monitored this year, and we found a total of 73 psyllids across 27 (34.2%) of the 79 monitored fields. However, we are still waiting to receive traps from 3 sites in the Magic Valley. One of the 79 total fields that we were sampling has been vine-killed.
Psyllids were collected on sticky traps in potato in the following counties: Payette (3 fields), Canyon (9 fields), Elmore (2 fields), Gooding (1 field), Twin Falls (6 fields), Jerome (1 field), Cassia (2 fields), Minidoka (2 fields), and Bingham (1 field). This was our first capture of a potato psyllid this year in eastern Idaho, which consistently has shown later first incidence of psyllids and lower abundance overall.
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Psyllid captures have fluctuated only a bit over the past three weeks, and thankfully we have not observed hot psyllids since mid-July.
“Heat maps” of this week’s results can be found on the UI and WSU websites linked below. “Hot spots” continue to be observed in the western Treasure Valley.
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.
--WSU site: https://potatoes.decisionaid.systems/idaho
» http://www.uidaho.edu/cals/potatoes/news
Corn Earworm Counts - 8/6/19
Corn Treasure Valley
corn earworm
Posted on: August 6, 2019 by Jerry Neufeld
Below are the corn earworm moth counts from this morning, August 6. There may be a few more moths this week, but the counts are still not real high. I am also including moth counts taken from the Grandview area. There are corn earworm moths around the valley, scouting on a more localized basis is still probably a good thing to do. I do not like the way the table displays in this box, so click on the pdf below to see the moth counts.
August 1, 2019 Psyllid captures declined a bit this week
Potato All Locations
Potato Psyllid
Posted on: August 1, 2019 by Lucy Standley
This week we had traps deployed in 81 of the 82 fields (98.7%) monitored this year, and we found a total of 67 psyllids across 27 (32.9%) of the 82 monitored fields. However, we are still waiting to receive traps from 19 sites in eastern Idaho. One of the 82 total fields that we were sampling has been vine-killed.
Psyllids were collected on sticky traps in potato in the following counties: Payette (3 fields), Canyon (12 fields), Owyhee (1 field), Elmore (3 fields), Twin Falls (6 fields), Cassia (1 field), and Minidoka (1 field).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Psyllid captures dropped a bit relative to last week; however, we continue to urge growers to maintain their IPM programs, especially given that we have historically seen an increase in captures during August.
“Heat maps” of this week’s results will soon be included on the UI and WSU websites (see links below), pending resolution of technical difficulties we are currently having with them.
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.
--WSU site: https://potatoes.decisionaid.systems/idaho
Blossom End Rot on Summer Squash and Tomato
Landscape and Garden Treasure Valley
Blossom End Rot on Squash and Tomato
Posted on: July 31, 2019 by Maria Held
Blossom end rot is showing up on summer squash. Tomatoes, peppers, eggplant and even watermelon may be affected. It occurs in the first fruits formed on the plants and is caused by a lack of calcium in the fruit. Most garden soils a sufficient supply of calcium; refer to your soil test results. However, uneven watering may cause symptoms in fast growing plants.
» https://pender.ces.ncsu.edu/2013/05/why-are-my-squash-rotting/
» https://www.canr.msu.edu/resources/blossom_end_rot_tip_sheet
Corn Earworm Counts - 7/31/19
Corn Treasure Valley
corn earworm
Posted on: July 31, 2019 by Jerry Neufeld
Below are the corn earworm moth counts from this morning. The greatest number of moths were found south of Lake Lowell and near Melba. Still, the numbers are fairly low. I am not aware of any thresholds in Idaho for this pest. According to a Purdue Extension publication entitled CORN INSECT CONTROL RECOMMENDATIONS – 2016, “control is only economically justified on seed, sweet, or popcorn. Treat if 10 or more moths for several consecutive nights are captured in an earworm pheromone trap just before or during silking.” You may want to scout cornfields for this pest, especially south of Lake Lowell and near Melba.
Location Date 7/31/19
South of Caldwell 5
South of Lake Lowell 18
South of Nampa 3
Melba 12
South of Melba 13
SouthWest of Homedale 7
West of Wilder 1
Between Parma & Wilder 3
West of Caldwell 7
UI Ag Talk Tuesday August 6 at 8:00AM in Pocatello
All Crops All Locations
General announcment
Posted on: July 30, 2019 by Kasia Duellman
Join U of I Extension personnel next Tuesday, August 6, for another UI Ag Talk Tuesday session, held this time at 8:00 AM at the Bannock County Extension office, 10560 Fairgrounds Rd, Pocatello.
The featured topic will be presented by U of I Extension specialist Ben Eborn, UI Extension Ag Economist. He will talk about economics/cost of production/markets forecast. Other topics are determined by YOU and those who attend, either in person or by Zoom.
To attend by Zoom,
Call-in Number: (669) 900-6833
Meeting ID: 349427773
(Optional) Zoom link: https://uidaho.zoom.us/j/349427773
See you there!
The UI Ag Talk Tuesday sessions are held first and third Tuesdays during the growing season (May through August) unless otherwise indicated, at different locations across southeastern Idaho. Following the sessions, a newsletter is made available that summarizes the topics discussed and provides articles on other timely topics.
Blossom Drop on Tomatoes and Peppers
Landscape and Garden Treasure Valley
Blossom Drop
Posted on: July 29, 2019 by Maria Held
Gardeners are experiencing blossom drop on their tomatoes and other vegetables. This is due to high daytime > 90 F and low nighttime <55 F temperatures we have been experiencing. Pollen becomes sterile during hot weather. Fertilizer high in nitrogen and lots of water lead to growth of leaves instead of fruit set.
» https://extension.oregonstate.edu/news/why-vegetables-drop-blossoms
July 25, 2019 One more Lso-positive psyllid found in Idaho
All Crops All Locations
Potato Psyllid
Posted on: July 25, 2019 by Lucy Standley
This week we had traps deployed in 83 of the 83 fields (100%) monitored this year and we found a total of 107 psyllids across 32 (35.9%) of the 83 monitored fields.
Psyllids were collected on sticky traps in potato in the following counties: Payette (3 fields), Canyon (11 fields), Owyhee (2 fields), Elmore (4 fields), Twin Falls (9 fields), Jerome (2 fields), and Cassia (1 field).
From last week’s samples, 1 psyllid tested positive for Lso (liberibacter), the bacterium associated with zebra chip disease (ZC). This hot psyllid was collected from one field in Twin Falls County.
Given the recent incidence of Lso observed in psyllids, we strongly urge growers and crop consultants to maintain their IPM programs.
The uptick in psyllid abundance this week is not surprising given that we historically have seen an increase in captures during late July through August. Abundance of psyllids so far has been higher this year than during the last two, but still not as high as during 2016 when hundreds of psyllids were captured each week during this time.
“Heat maps” of this week’s results are included on the UI and WSU websites (see links below). “Heat maps” describe predicted psyllid densities across the landscape, based on our trap counts and on predictive models developed over six years of psyllid monitoring in Idaho. These maps, developed in collaboration with WSU, should be used as a guideline, but not a definitive count of the number of insects in any given field at any given point in time. “Low,” “Moderate,” “High,” and “Very High” designations are arbitrary categories that illustrate relative abundance and should not be used as “thresholds.” More details on the “heat maps” can be found in Potato Progress Volume XVII, Number 2, 15 February 2017.
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.
--WSU site: https://potatoes.decisionaid.systems/idaho
Corn Earworm near Hammett, ID
Corn Treasure Valley
corn earworm
Posted on: July 25, 2019 by Jerry Neufeld
Sweet corn in the Hammett Idaho area has been found with earworm larvae. It is time to start scouting for this pest is you haven't already done so.
Corn Earworm - 2019
Corn Treasure Valley
corn earworm
Posted on: July 23, 2019 by Jerry Neufeld
I am once again collaborating with Charter Seed Co. on a project to trap corn earworm moths. Traps will be set out in corn fields at various locations near Dry Lake, Kuna, Melba, Middleton, Wilder, Homedale, and Caldwell. I will check the traps every few days and post the moth counts to this website.
The online Phenology and Degree Day Model (GDD) from Oregon State University is being used to estimate when the summer generation of corn earworm moths will emerge. This is the generation of moths that lay eggs in corn that is silking at the time when they emerge. The link to the GDD calculator for Corn Earworm is below.
The GDD model uses January 1 as a biofix, 55 and 92 as the temperature parameters. Summer moths will emerge after 1300 GDD have accumulated. These moths will then begin laying eggs in fresh corn silk. This model also estimates the eggs will hatch and larvae will begin feeding on corn ears 73 GDD later. According to this model, we will reach 1300 GDD in the Caldwell area about July 28, and will reach 1300 GDD in the Parma area about July 30. This is 6-10 days later than 2018. Egg laying in most, if not all, Treasure Valley locations will take place in this time frame. Larval feeding will begin 3 to 4 days later.
Traps will go out in a couple of days. The first moth counts will be posted a few days after the traps are set out.
The links below will take you to the websites where you can use the growing degree day model and also view various treatment methods based on the type of corn that you are growing.
» https://pnwhandbooks.org/insect/vegetable-seed/corn/corn-seed-corn-earworm-sweet-corn-only
» https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/corn-sweet-corn-earworm
» https://pnwhandbooks.org/insect/agronomic/field-silage-corn/field-silage-corn-corn-earworm
Powdery Mildew in Sugarbeets - 2019 - Twin Falls District
Sugarbeets All Locations
Powdery Mildew
Posted on: July 23, 2019 by Jerry Neufeld
Powdery mildew has been found by The Amalgamated Sugar Company Crop Consultants in sugarbeet fields in the Twin Falls District. 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
2019 Miller Research Potato Pest Management Field Day
Potato All Locations
Posted on: July 22, 2019 by Jeff Miller
Miller Research will be holding their annual potato pest management field day on Thursday, August 15 at the Miller Research facility located near Acequia, ID (426 E 200 N). The event is open to the public and there is no cost to attend.
Topics addressed on the tour will include:
• Susceptibility of varieties to disease with and without fungicide management.
• Fungicides for the control of early blight, brown spot, white mold, and black dot.
• Rhizoctonia management
• Fungicide programs for managing pink rot and Pythium leak
• Spore trapping for managing foliar diseases of potato
The presentations will focus on chemical management of diseases and will highlight research which has been funded by the Pacific Northwest Potato Research Consortium. ISDA pesticide recertification credits (2) and CCA Pest Management credits (2) have been awarded for this meeting.
In order to plan appropriately for lunch, please RSVP to by August 6 to Cheryn Clayton at 208-531-5124 or by email at cheryn@millerresearch.com.
» http://millerresearch.com/event/2019-miller-research-potato-pest-management-field-day/
Beet Leafminer in Gardens
Landscape and Garden Treasure Valley
Posted on: July 20, 2019 by Maria Held
Are you noticing papery areas or tunneling on you beets, Swiss Chard or spinach? The leafminer fly lays white eggs on the underside of leaves. The resulting larvae burrow inside the leaves to feed. See the links below for management options.
False Chinch Bug Migration
Landscape and Garden Treasure Valley
Nysius raphanus
Posted on: July 19, 2019 by Maria Held
The Caldwell Extension office has received multiple calls of masses of false chinch bugs. They may aggregate in large numbers on buildings or driveways especially if hosts are harvested or managed with herbicide. See the attached photo of a false chinch bug aggregation on a driveway.
Insecticides will have little, if any, effect for limiting this situation and are not recommended. False chinch bug migrations resulting in nuisance problems in buildings usually are of short duration and rarely last more than a week.
» http://ipm.ucanr.edu/PMG/PESTNOTES/pn74153.html
» https://extension.colostate.edu/topic-areas/insects/false-chinch-bugs-5-603-2/
» https://utahpests.usu.edu/ipm/ornamental-pest-guide/arthropods/plant-lace-seed-bugs/false-chinch-bug
July 18, 2019 First Lso-positive psyllids found in Idaho
Potato All Locations
Potato Psyllid
Posted on: July 18, 2019 by Lucy Standley
This week we had traps deployed in 83 of the 83 fields (100%) monitored this year and we found a total of 59 psyllids across 29 (34.9%) of the 83 monitored fields.
Psyllids were collected on sticky traps in potato in the following counties: Payette (1 field), Canyon (11 fields), Elmore (3 fields), Twin Falls (10 fields), Jerome (3 fields), and Cassia (1 field).
From last week’s samples, 5 psyllids tested positive for Lso (liberibacter), the bacterium associated with zebra chip disease (ZC). These hot psyllids were collected from one field in Payette County and two fields in Twin Falls County. In addition, one psyllid collected from a field in Canyon County in mid-June (before our monitoring program had officially started) tested positive for Lso.
Given the incidence of Lso observed in psyllids, we strongly urge growers and crop consultants to maintain their IPM programs.
We apologize for not having “heat maps” yet this week. We hope to have them generated before next week and posted on our website.
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.
Black Bean Aphid -2019
Sugarbeets All Locations
Black Bean Aphid
Posted on: July 17, 2019 by Jerry Neufeld
The Amalgamated Sugar Company personnel are reporting that Black Bean Aphids have been found in sugarbeet fields in the Magic Valley. Insecticides for Black Bean Aphid and Fungicides for Powdery Mildew can be tank mixed; however, TASCO has some concerns about the amount of water carrier used when these products are applied by air. TASCO asks that you contact your crop consultant if you have any application questions. Click on the link below for more information about Black Bean Aphid in the Pacific Northwest Insect Management Handbook.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-aphid
Getting Started with Cover Crops Workshop
All Crops Treasure Valley
Posted on: July 15, 2019 by Christy Tanner
If you are thinking about trying cover cropping this year, this workshop is designed to help you get started. We will cover species selection, planting, timing and termination. The course is designed for first time cover croppers, but those with more experience are welcome.
Time: 6 pm on Wednesday July 17th
Location: Malheur County Extension Office
710 SW 5th Ave Ontario, OR
Contact: 541-881-1417
christy.tanner@oregonstate.edu
Rupert Cereals Field Day - University of Idaho Cereal Extension Variety Trials
All Crops Magic Valley
Stripe rust, FHB, Take-all, Strawbreaker, Pythium, Rhizoc, Scald and any thing else you can think of
Posted on: July 12, 2019 by Juliet Marshall
JULY 16th. Rupert / Minidoka
Get the latest information on new releases of wheat and barley - both public and private varieties!
Bring your disease samples for diagnoses!
Join us for a great field day in Rupert next Tuesday morning!
Starting at Winter trials: Meridian Road north of Rupert at junction with 500 North on east side of road.
Spring trials ~700 N, 825 E
Lunch provided.
Contacts: Jason Thomas jasont@uidaho.edu 208-406-3571 or Jon Hogge (jhogge@uidaho.edu) or Juliet.Marshall@uidaho.edu
