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Chloryrifos (Lorsban) Uses
All Crops Northern Idaho
Posted on: December 22, 2021 by Stuart Reitz
We are working to survey additional minor crop uses of
chlorpyrifos (Lorsban) in Oregon, and working to systematically make sure that we have
information on all commodities in Oregon which have a chlorpyrifos label.
A very quick 3-question survey is available here: https://beav.es/U6w
Currently, we have no responses at all on sweet potato, carrot seed or beet seed, and very
few for sugar beet. Responses from growers with those crops would be especially appreciated.
2022 Miller Research Potato Pest Management Meeting
Potato All Locations
Posted on: December 17, 2021 by Jeff Miller
After meeting virtually in 2021, Miller Research will be
holding its annual Potato Pest Management Meeting in person on February 10,
2022, at the Historic Wilson Theater in Rupert, ID. The meeting will run from
8:30 am to 12:00 pm with a 30-minute break at 10:00 am. Three CCA (integrated
pest management) credits and three ISDA pesticide recertification credits have
been awarded for the meeting. Oregon and Washington credits have been requested.
We are working on making a virtual option available. If this
works, virtual attendees will still need to pay the registration fee and answer
questions during the presentation as proof of attendance.
Registration is $20 to cover the cost of the meeting.
Additional proceeds will be donated to the 4-H program.
Meeting agenda:
8:00 am – 8:30 am: Registration
8:30 am – 9:00 am: Seed treatments for Fusarium dry rot
management
9:00 am – 9:30 am: The impact of anastomosis group on
Rhizoctonia canker management
9:30 am – 10:00 am: Verticillium wilt control
10:00 am – 10:30 am: Break
10:30 am – 11:00 am: Control options for powdery scab and
potato mop-top virus
11:00 am – 11:30 am: PVY and Seed Health (Dr. Jonathan
Whitworth, USDA)
11:30 am – 12:00 pm: Managing pesticide resistance
» https://millerresearch.com/event/2022-miller-research-potato-pest-management-meeting/
2021 Annual Survey Winners
All Crops All Locations
Posted on: December 10, 2021 by Jerry Neufeld
Thanks to everyone that completed a 2021 annual survey for the PNWPestAlert.net website. The winners of the Texas Roadhouse gift cards are Ron Y, Mike M, and Kevin K.
Register for the in-person 2022 Idaho Potato Conference
Potato All Locations
Posted on: November 29, 2021 by Nora Olsen and Mike Thornton
Registration
is now OPEN!
The 54th
annual Idaho Potato Conference and Eastern Idaho Ag Expo presented by the
University of Idaho and Spectra Productions will be live and in-person in 2022.
Set your calendars to attend the 2022 Idaho Potato Conference January 19 and 20
in Pocatello, ID. Attend your choice of educational presentations and workshops
from three concurrent sessions over the one and half-day conference and take
some time to visit the adjoining trade show that features over 70 booths and
displays highlighting agricultural products and services.
Seminars and workshops in Spanish will
be held both days and include a wide variety of topics from beneficial insect
identification to farm safety discussions.
Earn CCA (CEU) and pesticide
recertification credits at seminars and workshops throughout the in-person
conference.
Select presentations will be recorded
and available at the conference website after the conference. Registration for the
conference will be required to gain access to the recorded presentations.
Cost for pre-registration is $40 per person ($50 at the
door). We strongly encourage everyone to pre-register and avoid the lines at
the conference. Additional details regarding the agenda, topics, and
registration can be found at https://www.uidaho.edu/cals/potatoes/news/idaho-potato-conference.
2021 Idaho Association of Plant Protection registration now available online
All Crops All Locations
Posted on: October 25, 2021 by Jeff Miller
The agenda has been set and registration is now available for the 2021 Annual Idaho Association of Plant Protection (IAPP) annual meeting.
For those who want to attend by Zoom, you must register for the Zoom meeting (a separate registration for each day) and then you must also register at the following link:
https://millerresearch.com/event/2021-idaho-association-of-plant-protection/
After registering at the link, you will receive an email allowing you to pay online via PayPal. Registration in person will be available at 12:30 pm on Wednesday and can be paid by check or cash.
Three ISDA pesticide recertification credits and 3.5 CCA Pest Management credits are available each day. The $15 registration fee covers both days and the cost is the same if you attend one or both days.
» https://millerresearch.com/event/2021-idaho-association-of-plant-protection/
Pesticide Fall Recertification Webinar Series
All Crops All Locations
Posted on: October 22, 2021 by Kimberly Tate
The UI Extension Pesticide Safety Education Program (PSEP) will be conducting 6-webinars on Tuesdays from Nov. 2 - Dec. 14. Completed webinars receive one-pesticide credit*. These webinars are synchronous and held from 10 AM - 11:15 AM (MST). The cost is $10 per applicator/webinar. Enroll now on our UI Marketplace HERE. Check out the details in the attached UIPSEP Fall Recertification Webinars poster. For more information, contact Kimberly Tate at ktate@uidaho.edu.
*For pesticide credit: Pesticide applicators must answer questions throughout the webinar session. This requires individual computer and internet access for each user. Answers will be collected to confirm attendance was maintained for the entire webinar.
Bird cherry-oat aphids on the move; time to inspect fields
Small Grains All Locations
Bird Cherry Oat Aphids
Posted on: October 8, 2021 by Jerry Neufeld
The winged from of bird cherry-oat aphids has been observed in winter wheat in Twin Falls County, Idaho; the wheat was planted in late-September.
The observed aphid numbers were relatively low (averaging one per young seedling), but it indicates that the aphids are on the move, and that the numbers could increase, if the mild weather continues.
Although bird cherry-oat aphids rarely cause significant damage to small grains by direct feeding, they are efficient vectors of Barley yellow dwarf virus (BYDV).
See below publication for more information on BYDV symptoms and the aphid vectors.
» https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1210.pdf
Artificial Intelligence for Insect Identification
All Crops All Locations
Posted on: September 30, 2021 by Jerry Neufeld
As a component of a USDA-funded project, Harnessing
artificial intelligence for implementing integrated pest management in
small-grain production systems, the University of Idaho is developing a system
to automatically identify insects in wheat and other crops based on submitted
cellphone images.
To develop this system, we need your help with collecting a
large number of photographs of pests and beneficial insects observed in cereal
cropping systems
(cereals and rotation crops) throughout the region. To date,
we have received more than 1300 insect photos- Thank you for your continuing
support!
We will need thousands of photos to train our computer
algorithm to enable the system to generate the most accurate identifications of
unknown samples.
To help us develop this tool, please upload insect
photographs through this link: https://cerealpestaid.net/
2021 Idaho Association of Plant Protection Agenda - Nov. 3-4, Burley Best Western
All Crops All Locations
Posted on: September 28, 2021 by Jeff Miller
The agenda has now been posted for the 2021 Idaho Association of Plant Protection annual meeting on Nov. 3-4 in Burley, ID. See the attached files for more information. ISDA pesticide recertification credit and CCA Pest Management credits have been requested.
» https://millerresearch.com/event/2021-idaho-association-of-plant-protection/
Psyllid Update September 17, 2021
Potato All Locations
potato psyllid
Posted on: September 17, 2021 by Erik Wenninger
This is the final report of the 2021 Idaho psyllid monitoring program.
From our samples from last week, we found our first Lso-positive psyllid of the season, on a site in Owyhee County. All other psyllids tested from last week were negative for Lso, the bacterium associated with zebra chip disease (ZC). The total percent positive among all sites for the season was 0.08%, which is the lowest incidence of Lso we have observed during the past decade.
During mid- to late July, it appeared that overall psyllid captures would be relatively high this year; however, captures were lower during August, which is the time of year that our psyllid captures are often highest. It is possible that the high temperatures during June to July contributed to higher captures and the more moderate temperatures in August contributed to more modest captures. In the end, overall captures across the season were relatively modest compared to other seasons, and similar to overall captures last year.
Greater abundance of psyllids earlier during the season should generally contribute to greater risk of ZC disease development over the season. However, risk of ZC is a function of both psyllid abundance over the season and Lso incidence. The extremely low incidence of Lso observed in psyllids coupled with relatively modest captures overall, suggests relatively low risk of ZC in the crop this season.
To dive more deeply into the capture data over the season, you can view contour maps that illustrate relative psyllid abundance across the landscape each week here: https://potatoes.decisionaid.systems/
More details can also 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.
Psyllid Update September 9, 2021
Potato All Locations
potato psyllid
Posted on: September 9, 2021 by Erik Wenninger
This week we had traps deployed in 48 fields, though we are still waiting for traps from one Treasure Valley field. We found a total of 66 psyllids across 15 (32%) of the 47 fields for which we have data. With many fields undergoing vine kill, this is our last week of retrieving sticky traps. We will, however, report on Lso results and a season recap next week.
Overall psyllid captures this week were similar to the last two weeks, with considerably lower captures than for most recent weeks. We recorded moderate captures in parts of the Treasure Valley and Owyhee to Elmore counties as well as near Twin Falls. We recorded low captures elsewhere.
Psyllids were captured in the following counties: Canyon (3 fields), Owyhee (3 fields), Elmore (1 field), Twin Falls (5 fields), Minidoka (2 fields), and Cassia (1 field).
All psyllids tested from last week were negative for Lso, the bacterium associated with zebra chip disease (ZC). Testing of late-arriving psyllids from one field in Canyon County is pending. Thus far, all of our psyllid samples have been negative.
With harvest season upon us, it is worth remembering that our studies in Russet Burbank showed that ZC can develop during storage if infection occurs as late as two weeks before vine kill. Please consider this in your late-season IPM programs.
To view contour maps that illustrate relative psyllid abundance across the landscape, set up a free account here: https://potatoes.decisionaid.systems/
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.
Psyllid Update September 2, 2021
Potato All Locations
potato psyllid
Posted on: September 3, 2021 by Erik Wenninger
This week we had traps deployed in 58 fields, though we are still waiting for traps from one Treasure Valley field. We found a total of 72 psyllids across 13 (23%) of the 57 fields for which we have data. Many fields have undergone vine kill and will no longer be sampled.
Overall psyllid captures this week and last week have been considerably lower than for recent weeks. Contour maps (see links below) graphically reflect relatively high abundance of psyllids collected in Elmore County. We recorded moderate to low captures in other parts of the state and zero captures in eastern Idaho.
Psyllids were captured in the following counties: Canyon (3 fields), Owyhee (3 fields), Elmore (2 fields), Gooding (1 field), and Twin Falls (4 fields).
We expect to get Lso results tomorrow, and we will post them on our sites (below) as soon as they are available. Thus far, all of our previous psyllid samples have been negative for Lso, the bacterium associated with zebra chip disease (ZC).
With harvest season upon us, it is worth remembering that our studies in Russet Burbank showed that ZC can develop during storage if infection occurs as late as two weeks before vine kill. Please consider this in your late-season IPM programs.
To view contour maps in more detail, set up a free account here: https://potatoes.decisionaid.systems/
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.
2021 Spider Mites
General Landscape and Garden Treasure Valley
Spider Mites (Tetranychidea)
Posted on: September 1, 2021 by Nic Usabel
Idaho Master Gardeners observed a spider mite infestation on zucchini during a recent integrated pest management walk. Spider mites are small (1/60 inch) and cause leaves to appear dirty due to their abundant webbing and adhering of dust. Symptoms include stippling on upper surface of leaves, bronzing and scorching of leaves, and death of foliage when damage is severe.
If you suspect a mite infestation, shake infested leaves over a white sheet of paper. If the small dots that fall to the paper move around, you likely have spider mites. For additional identification or confirmation, reach out to your local Extension office. Most spider mite activity peaks during dry conditions.
Management:
- Spider mites have a number or predatory mites and insects that can provide a high level of control. Avoid insecticides that are nonselective to help preserve predatory insects and mites. Examples include carbaryl, malathion, pyrethroid.
- Periodic hosing of plants with a forceful jet of water can physically remove spider mites and reduce dry dusty conditions favored by spider mites.
- If using a chemical control, select miticides that are specifically developed for spider mite control.
References:
- Pumpkin & Squash Spider Mite, PNW Handbook
- Spider Mites, Colorado State University
- Vegetable Crop Pest: Spider Mite, PNW Handbook
2022 Idaho Potato Conference Call for Topics
Potato All Locations
Posted on: August 31, 2021 by Nora Olsen and Mike Thornton
This the first call for
topics for the 2022 Idaho Potato Conference that will take place in Pocatello,
ID on January 19th and 20th. Please provide your ideas for potential
workshops and presentations for this year's conference to Nora Olsen (norao@uidaho.edu) or Mike Thornton (miket@uidaho.edu) by September 30th so that we can put together
a preliminary list for the program planning meeting. Please also suggest
a speaker if you have someone in mind that would do a good job of covering the
topic.
Psyllid Update August 26, 2021
All Crops All Locations
potato psyllid
Posted on: August 26, 2021 by Erik Wenninger
This week we had traps deployed in all 73 fields, though we are still waiting for traps from two fields in eastern Idaho. We found a total of 64 psyllids across 22 (31%) fields.
Overall psyllid captures were considerably lower than for recent weeks. Contour maps (see links below) graphically reflect relatively high abundance of psyllids collected in some fields in the western Treasure Valley and in Elmore County, but this abundance is markedly lower than in previous weeks. Moderate to low captures were recorded in the Magic Valley and very few captures were recorded east of the Magic Valley.
Psyllids were collected on sticky traps in potato in the following counties: Canyon (9 fields), Payette (1 field), Owyhee (2 fields), Elmore (2 fields), Twin Falls (6 fields), Cassia (1 field), and Bingham (1 field).
Once again, all psyllids tested from last week were negative for Lso, though testing of a single psyllid from last week is still pending. We have yet to find any Lso-positive psyllids this season.
With harvest season upon us, it is worth remembering that our studies in Russet Burbank showed that ZC can develop during storage if infection occurs about two weeks before vine kill. Please consider this in your late-season IPM programs
To view contour maps in more detail, set up a free account here: https://potatoes.decisionaid.systems/
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.
» https://potatoes.decisionaid.systems/
2021 Idaho Association of Plant Protection - Nov. 3-4, Burley Best Western
All Crops All Locations
Posted on: August 25, 2021 by Jeff Miller
The 2021 Idaho Association of Plant Protection Annual Meeting will be held Wednesday, November 3 at 1:00 pm to Thursday, November 4 at 1:00 pm at the Best Western Inn & Convention Center, Burley, Idaho. Registration will begin at 12:30 PM on Wednesday. The conference will cover all aspects of plant protection including entomology, nematology, weed science, and plant pathology.
Please consider contributing to the meeting research results, observations, unusual pest and disease occurrences, and topics that could be discussed as a group. Each presentation will be allotted a 20-minute time slot. A final program will be advertised in October. Registration begins at 12:30 p.m. on Wednesday and the program will begin at 1:00 p.m. Registration costs $15.00 and can only be made by check or cash. Certified Crop Advisor (CCA) and Pesticide Recertification credits (ISDA) will be available.
Hotel reservations must be made on your own. Special hotel rates have been negotiated for the participants: $89.00 per night for the Burley Inn (www.burleyinn.com or 208-678-3501) and $65.00 for the Budget Motel nearby (www.burleybudgetmotel.com or 208-678-2200). Please refer to the attached hotel flyer.
Please complete the attached form if you want to participate and reply by email to Alexander Karasev (akarasev@uidaho.edu). If you are not attending this meeting but would like to be notified of future meetings, please send us your updated contact information. Responses can be sent to:
Alexander Karasev: akarasev@uidaho.edu
University of Idaho, Dept. of EPPN
Moscow, ID 83844-2329
(208) 885-2350
Please respond by September 17th, 2021. Also, please share with any who may have an interest.
» https://millerresearch.com/event/2021-idaho-association-of-plant-protection/
Psyllid Update August 19, 2021
Potato All Locations
potato psyllid
Posted on: August 19, 2021 by Erik Wenninger
This week we had traps deployed in all 73 fields, though we are still waiting for traps from one field. We found a total of 115 psyllids across 25 (35%) fields.
Overall psyllid captures were slightly lower than last week. Contour maps (see links below) still graphically reflect relatively high abundance of psyllids collected in some fields in the western Treasure Valley. The Elmore County “hot spot” is slightly diminished. Moderate to low captures were recorded in the Magic Valley. We captured two psyllids in Cassia County, but recorded no psyllid captures further east.
Psyllids were collected on sticky traps in potato in the following counties: Canyon (7 fields), Payette (1 field), Gem (1 field), Owyhee (2 fields), Elmore (2 fields), Gooding (1 field), Jerome (2 fields), Twin Falls (7 fields), Cassia (2 fields), and Power (1 field).
Once again, all psyllids tested from last week were negative for Lso, though tests of psyllids from six fields in the western Treasure Valley that arrived late to us last week are still pending. We have yet to find any Lso-positive psyllids this season.
Nevertheless, we urge growers to watch psyllid numbers closely during the coming weeks and to have their IPM programs in place.
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.
--To view contour maps in more detail, set up a free account here: https://potatoes.decisionaid.systems/
UI Ag Talk Tuesday August 17 11:00 AM- last one for 2021
All Crops All Locations
General announcment
Posted on: August 16, 2021 by Kasia Duellman, Pam Hutchinson, Juliet Marshall
The final University of Idaho Ag Talk Tuesday session is Tuesday, August 17 at 11 AM (MT).
Join and listen to or actively participate in round table crop updates, followed by featured topics.
The Featured topics and presenters for the 8/17 session are:
Seed potato germplasm update — Jenny Durrin, Director, Seed Potato Germplasm Program
Fungicide resistance management and fungicide resistance in Fusarium species — Kasia Duellman, Christy Christian
Registration is required. Please visit our website for more information and to register: www.uidaho.edu/ag-talk
» https://www.uidaho.edu/extension/news/ag-talk-tuesday
» https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz
2021 Miller Research Potato Pest Management Field Day this Thursday
All Crops All Locations
Posted on: August 16, 2021 by Jeff Miller
The Miller Research Potato Pest Management Field Day will be on Thursday, August 19 from 10:00 am to 12:00 noon. Details can be found at the link below. Two ISDA and two CCA credits are available.
» https://millerresearch.com/event/2021-miller-research-potato-pest-management-field-day/
Psyllid Update August 12, 2021
Potato All Locations
potato psyllid
Posted on: August 12, 2021 by Erik Wenninger
This week we had traps deployed in all 73 fields. However, we are still waiting to receive traps from 8 fields in the Treasure Valley (mostly in Canyon County). Of the 65 fields included in this update, we found a total of 93 psyllids across 19 (29%) fields. Updated data from the 8 missing fields will be added to our sites as soon as possible; almost certainly the overall psyllid tally for the week and especially for Canyon County will tick up a bit.
Overall psyllid captures were similar to last week. Contour maps (see links below) still graphically reflect relatively high abundance of psyllids collected in some fields in Elmore County (though slightly lower than in recent weeks) and the western Treasure Valley, but a small “hot spot” is also developing near Twin Falls. Otherwise, modest captures were recorded elsewhere in the Magic Valley, and we continue to see very few psyllids in the Upper Snake region.
Psyllids were collected on sticky traps in potato in the following counties: Canyon (2 fields), Owyhee (3 fields), Elmore (2 fields), Gooding (1 field), Jerome (2 fields), Twin Falls (7 fields), Cassia (1 field), and Power (1 field).
Once again, all psyllids tested from last week were negative for Lso. We have yet to find any Lso-positive psyllids this season.
Nevertheless, we urge growers to watch psyllid numbers closely during the coming weeks and to have their IPM programs in place.
Contour maps or “heat maps” are included on the UI website (see link below). These maps describe predicted psyllid densities across the landscape, based on our trap counts and on predictive models developed in collaboration with colleagues at Washington State University from our many years of data on psyllids in Idaho. We include just a screenshot of the contour maps on our site, so we encourage stakeholders to visit the Decision Aid Systems site and create a free account to view each week’s maps and other pest data in more detail: https://potatoes.decisionaid.systems/
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.
Psyllid Update August 5, 2021
Potato All Locations
potato psyllid
Posted on: August 5, 2021 by Erik Wenninger
This week we had traps deployed in all 73 fields monitored this year. We found a total of 94 psyllids across 30 (42%) of the 73 fields.
Overall psyllid captures declined again from last week. Contour maps (see links below) still graphically reflect relatively high abundance of psyllids collected in some fields in Elmore County and the western Treasure Valley, but at least in the Treasure Valley tend to show more moderate incidence of psyllids than last week. Modest captures were recorded in the Magic Valley, and we continue to see very few psyllids in the Upper Snake region.
Psyllids were collected on sticky traps in potato in the following counties: Canyon (9 fields), Owyhee (3 fields), Elmore (2 fields), Gem (1 field), Gooding (2 fields), Jerome (4 fields), Twin Falls (6 fields), Cassia (1 field), Minidoka (1 field), and Bingham (1 field).
All of the psyllids tested from last week and all previous weeks have been negative for Lso.
Nevertheless, we urge growers to watch psyllid numbers closely during the coming weeks and to have their IPM programs in place.
Contour maps or “heat maps” are included on the UI website (see link below). These maps describe predicted psyllid densities across the landscape, based on our trap counts and on predictive models developed in collaboration with colleagues at Washington State University from our many years of data on psyllids in Idaho. We include just a screenshot of the contour maps on our site, so we encourage stakeholders to visit the Decision Aid Systems site and create a free account to view each week’s maps and other pest data in more detail: https://potatoes.decisionaid.systems/
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.
Corn Earworm Counts - 8/4/21
Corn Treasure Valley
corn earworm
Posted on: August 4, 2021 by Jerry Neufeld
Below are the corn earworm moth counts from this morning, August 4. The counts are increasing in certain areas, as you can see below. If you have corn with fresh silk you may want to increase your scouting in areas where the counts are increasing.
Location Date
23-Jul 28-Jul 4-Aug
South of Nampa 2 2 9
Melba 1 0 0
Homedale 4 12 21
Wilder 3 3 29
Roswell 0 4 22
Middleton 2 0 3
Total 12 21 84
UI Ag Talk Tuesday August 3 11:00 AM (MT)
All Crops All Locations
General announcment
Posted on: August 3, 2021 by Kasia Duellman
The next University of Idaho Ag Talk Tuesday session is Tuesday, August 3 at 11 AM (MT).
Join and listen to or actively participate in round table crop updates, followed by featured topics.
The Featured topics and presenters for the 8/3 session are:
Teff: benefits, production practices, and current market situation — Ms Ritika Lamichhane, MS student (advised by Olga Walsh, Extension Cropping Systems Agronomy)
Potato cropping systems trials at Aberdeen R&E Center - Pam Hutchinson (Extension Specialist — Potato Cropping Systems Weed Scientist
Selected research projects aimed at managing tuber-borne diseases - Kasia Duellman, seed potato specialist
Registration is required. Please visit our website for more information and to register: www.uidaho.edu/ag-talk
Psyllid Update July 29, 2021
Potato All Locations
Potato Psyllid
Posted on: July 29, 2021 by Lucy Standley
This week we
had traps deployed in all 73 fields monitored this year. We found a total of 126
psyllids across 36 (49%) of the 73 fields.
Psyllids were
collected on sticky traps in potato in the following counties: Canyon (11
fields), Owyhee (2 fields), Elmore (2 fields), Payette (1 field), Gem (1
field), Gooding (2 fields), Jerome (4 fields), Twin Falls (6 fields), Cassia (2
fields), Minidoka (3 field), and Power (2 fields).
Psyllid
captures overall declined a bit from last week. Contour maps (see links below)
still graphically reflect relatively high abundance of psyllids collected in
some fields in the western Treasure Valley and Elmore County, but both areas
show more moderate incidence of psyllids than last week. Moderate captures were
recorded in the Magic Valley, and we continue to see very few psyllids in the
Upper Snake region.
All of the
psyllids tested from previous weeks have been negative for Lso. Samples tested
from last week so far show no evidence of Lso; however, we only have results
from one of the two primers used to test for Lso. Results from the first primer
were all negative, which was sufficient to confirm a negative result in almost all
of our tests during that past ten years. We should have results from the second
primer tomorrow to confirm these results, and we will post another update if
any samples are positive.
We urge growers
to watch psyllid numbers closely during the coming weeks and to have their IPM
programs in place.
Contour maps or
“heat maps” are included on the UI website (see link below). These maps
describe predicted psyllid densities across the landscape, based on our trap
counts and on predictive models developed in collaboration with colleagues at
Washington State University from our many years of data on psyllids in Idaho.
We include just a screenshot of the contour maps on our site, so we encourage
stakeholders to visit the Decision Aid Systems site and create a free account
to view each week’s maps and other pest data in more detail: https://potatoes.decisionaid.systems/
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.
Corn Earworm Counts - 7/28/21
Corn Treasure Valley
corn earworm
Posted on: July 29, 2021 by Jerry Neufeld
Below are the corn earworm
moth counts from this morning, July 28. At
this time counts are still low, except they are rising a little bit in the
Homedale area. I will check the traps
again in a few days to see if the numbers are increasing.
Location | Date | |
23-Jul | 28-Jul | |
South | 2 | 2 |
Melba | 1 | 0 |
Homedale | 4 | 12 |
Wilder | 3 | 3 |
Roswell | 0 | 4 |
Middleton | 2 | 0 |
Total | 12 | 21 |
