Crop Alerts
Showing 25 most recent Crops alerts
Swipe Left or Right to navigate Alerts
Stripe (Yellow) rust found in Filer / Buhl area
All Crops All Locations
Stripe rust (yellow rust) in wheat
Posted on: June 17, 2022 by Juliet Marshall
With the spring weather perfect for small grain production, it is no surprise that stripe rust was finally confirmed in southern Idaho. Thanks and a free lunch goes to Trenton Stanger, Westbred, for the first reported sighting in breeding plots near Buhl. The breeding line was significantly infected, but isolated (that is, infections were not widespread in the field). Most of the plots were just past flowering, and there is a long way to go for the winter crop to finish. We are about 10-14 days behind the previous years according to growing degree day estimates. (Be sure to check plant growth stage prior to shutting off irrigation. You don't want to shut off irrigation too soon or too late - remember the general rule of thumb of "Full soil profile of moisture at soft dough before water shut off.")
We are past the window of application for fungicides for winter wheat, and the stripe rust disease pressure is low.
The greatest threat will be for susceptible spring wheat varieties. Scout spring wheat fields for infection, and report infections to University personnel in order for us to track and report new occurrences. Fungicide applications will likely not be required for moderately resistant and resistant varieties. Fungicides on the market are equally effective as stripe rust protectants, but as the flag leaves emerge, do not use strobilurin fungicides as that increases risk for DON contamination in grain from FHB or scab infection.
Remember to read and follow all label directions.
Lygus Bug in Alfalfa Seed - 2022
Alfalfa Seed Treasure Valley, Treasure Valley - Idaho, Northern Idaho
lygus
Posted on: May 16, 2022 by Jerry Neufeld
The western tarnished plant bug (Lygus hesperus) degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition shows that, depending on your location in the Treasure Valley, we have accumulated 240 growing degree days between January 1, 2022 and May 16, 2022. Peak emergence of lygus bug 1st and 2nd instar nymphs occurs around 277 accumulated growing degree days. Using the predicted degree day model, peak emergence is predicted to occur on approximately May 22. We suggest growers monitor for lygus bugs in alfalfa seed fields starting very soon.
When using insecticides, fields should be treated when the numbers of lygus bugs reach a management threshold of 4-5 lygus bug nymphs per 180-degree sweep. Follow all insecticide labels and recommendations, including targeting the correct life stage.
The link below will take you to the PNW Insect Management Handbook for lygus.
» https://pnwhandbooks.org/insect/legume-grass-field-seed/alfalfa/alfalfa-seed-lygus-bug
Ag Talk Tuesdays resume for 2022
All Crops All Locations
General announcment
Posted on: April 19, 2022 by Kasia Duellman
We are excited to announce that the University of Idaho Extension's Ag Talk Tuesday sessions resume May 3 for the 2022 season.
Each session starts at 11:00 AM (MDT) on the first and third Tuesdays, May through August.
These live events begin with crop updates where all participants are invited to contribute, followed by a featured presentation. You can find a schedule of featured topics and speakers (subject to change) and more information on our website:
https://www.uidaho.edu/ag-talk
Registration is required to attend. You only need to register once to attend all sessions. Once you register, information on how to attend via Zoom or by calling in by phone will be sent to you in a separate email.
To register, click this link (or copy and paste the following into your web browser):
https://uidaho.zoom.us/meeting/register/tZElce6uqTwpH9CuQSsCTa_7B01HC8gfuGXn
Please join us starting May 3 at 11:00 AM (MDT) for these live, online sessions that focus on agriculture - current season issues related to pests, diseases, weeds, diagnostics, soil health, irrigation/water, agronomy & more along with featured topics and guest speakers.
For questions, please contact one of the organizers:
Kasia Duellman (kduellman@uidaho.edu)
Doug Finkelnburg (dougf@uidaho.edu)
Pam Hutchinson (phutch@uidaho.edu)
Juliet Marshall (jmarshall@uidaho.edu)
Olga Walsh (owalsh@uidaho.edu)
Seeking help for a research project
Potato All Locations
Posted on: April 7, 2022 by Jeff Miller
A research project funded by the tri-state (ID, WA, and OR) research consortium is looking for some help (see below). If you are able and interested, please contact David Wheeler (contact info below).
Good luck with planting!
Jeff
A team of scientists at Washington State University, Oregon State University and USDA-ARS received a second year of funding from the Northwest Potato Research Consortium to characterize so called “virgin” soils that have never been planted with potato. Growers have long observed yield increases (14-26%) when planting potato in virgin soils compared to nearby non-virgin soils that have been planted in potato. Our short term goal is to document the properties (e.g. biological, physical, and chemical) in the soil associated with these yield increases. Long term we want to use this information to reproduce these yield increases in commercial fields. To do this we need your help!
Can you please reach out to us if you know any pairs of potato fields that will be planted with potato this year and were either (i) planted with potatoes within the past 5 years (non-virgin fields) or (ii) never planted with potato (virgin fields)? With your permission we can then visit each field, sample soil from each field before planting, and sample soil from nearby “native soil” that has never been planted with any crop. Once we have these three types of samples we will characterize the soil pathogen loads, nematode diversity and abundance, and soil biological, physical, and chemical properties. Lastly, we will bring the soils to a common location and plant potatoes in each soil to quantify potato performance in each soil type.
Please contact David Wheeler via email (David.wheeler@wsu.edu) or mobile (215-880-3024). Thank you all in advance for your time and attention. We look forward to working together this year.
David Wheeler, Cynthia Gleason, Ken Frost, Deirdre Griffin LaHue, and Tim Paulitz
Potato soil health survey - your help is requested!
Potato All Locations
Posted on: February 18, 2022 by Jeff Miller
Researchers from the University of Idaho, Montana State University, and the University of Minnesota would like your feedback on potato production and soil health. The results of this survey will influence the important research done by these teams. They'll ask questions about crop rotations, soil health management practices, and fumigation in this brief survey. As a token of their appreciation, you'll be eligible to enter into a drawing for a $100 Cabela's (or equivalent) gift card after you've completed the survey. If you have any questions, please contact Alex Maas at alexmaas@uidaho.edu.
» https://uidaho.co1.qualtrics.com/jfe/form/SV_8bQye9iBZ5UHI0K
UI Extension Pesticide Safety Education Program
All Crops All Locations
Posted on: February 2, 2022 by Jerry Neufeld
The UI Extension Pesticide Safety Education Program will be offering pre-license trainings ONLINE, via Zoom. This 4-day class is designed to be both with live instructors and work on your own, at your own pace. Students are required to have a computer or smart tablet with internet access. You will learn core pesticide safety practices and prepare for the following Idaho State Department of Agriculture pesticide exams; Private Applicator, Professional Applicator: Law and Safety; Agricultural Herbicide; Agricultural Insecticide; Ornamental Herbicide; Ornamental Insecticide; General Pest; Right of Way; and Chemigation.
Classes meet twice daily Monday through Thursday. Choose one of the following weeklong sessions:
1. March 14-17, 2022, from 9-11:30 am (MST) and 1:30-4 pm (MST). Registration closes, March 9, 2022.
2. March 28-31, 2022, from 9-11:30 am (MST) and 1:30-4 pm (MST). Registration closes, March 23, 2022.
Click on the pdf below for more information.
2022 Miller Research Potato Pest Management Meeting Final Notice
Potato All Locations
Posted on: January 31, 2022 by Jeff Miller
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 credits have been awarded for CCA (integrated pest management), Idaho, Oregon, and Washington pesticide recertification.
For those not able to attend in person, a virtual option will be available. If you want to participate by Zoom, contact Cheryn Suarez (cheryn@millerresearch.com) after registration and she will send you the link to attend. Virtual attendees will need to answer questions on Zoom to verify participation. Thus, each person desiring credits needs to be logged in. Contact us if you need to make other arrangements.
Registration is $20 to cover the cost of the meeting. After covering meeting costs, 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/
Treasure Valley Virtual IPM Meeting
All Crops All Locations
Posted on: January 25, 2022 by Jerry Neufeld
The Treasure Valley Virtual IPM Meeting is being held on Tuesday February 8th at 9 am. After registering (only requires name and email) you will receive information about joining the meeting. The meeting is free to attend and two ISDA credits, two ODA (core) credits and two CCA IPM Credits are available. Click on the pdf below for the registration link and more program information.
Idaho Potato Conference
Potato All Locations
Posted on: January 13, 2022 by Nora Olsen and Mike Thornton
Early
registration ends tomorrow Friday January 14th. Register Now!
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.
2022 highlights of the Idaho Potato
Conference:
· There
will be several seminars and workshops on the impact of the 2021 season
including heat impact on potatoes, soil health, storage losses, and irrigation
efficiency.
· Invited
speaker Dr. Carrie Wohleb from Washington State University will present on the Impacts
of Wildfire Smoke on Potatoes.
· Current
outlooks on water, economics, labor and sustainability from industry leaders
will bring us up to date on major topics for the potato industry.
· Special
guests from the National Potato Council, Potatoes USA, Idaho Potato Commission
will provide industry updates.
· Multiple
pest protection presentations and workshops including tank mixing
considerations, rotational crops and herbicide carryover issues, pollinators
and potatoes, Fusarium dry rot aggressiveness, managing Rhizoctonia, diagnosing
crop injury, pesticide resistance management, alternatives to fumigation,
rotation and potato cyst nematode control, and comprehensive disease and weed
management workshops.
· Economists
will present a workshop on the profitability implications of fertilizer cost
increases in addition to a discussion on the seasonality of retail rejections.
The latter discussion will dovetail with a one-hour workshop on the impact of
bruise on quality.
· A
workshop dedicated to ‘Everything you wanted to know about potato viruses, but
were afraid to ask.’ Come with questions to ask a panel of experts on the topic
of tuber necrotic diseases.
· 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
theater 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. Pre-registration will close at 5 pm MT on
January 14. After that time, please plan to register in-person at the
conference (cost increase to $50). 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.
» https://www.uidaho.edu/cals/potatoes/news/idaho-potato-conference.
2022 Idaho Potato Conference
Potato All Locations
Posted on: January 6, 2022 by Nora Olsen and Mike Thornton
Register
Now!
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.
2022 highlights of the Idaho Potato
Conference:
· There
will be several seminars and workshops on the impact of the 2021 season
including effect of the weather on soil fertility, heat impact on potatoes,
soil health, storage losses, and irrigation efficiency.
· Invited
speaker Dr. Carrie Wohleb from Washington State University will present on the Impacts
of Wildfire Smoke on Potatoes.
· Current
outlooks on water, economics, labor and sustainability from industry leaders
will bring us up to date on major topics for the potato industry.
· Special
guests from the National Potato Council, Potatoes USA, Idaho Potato Commission
will provide industry updates.
· Multiple
pest protection presentations and workshops including tank mixing
considerations, rotational crops and herbicide carryover issues, pollinators
and potatoes, Fusarium dry rot aggressiveness, managing Rhizoctonia, diagnosing
crop injury, pesticide resistance management, alternatives to fumigation, rotation
and potato cyst nematode control, and comprehensive disease and weed management
workshops.
·
Economists will present a workshop on
the profitability implications of fertilizer cost increases in addition to a
discussion on the seasonality of retail rejections. The latter discussion will
dovetail with a one-hour workshop on the impact of bruise on quality.
·
A workshop dedicated to ‘Everything
you wanted to know about potato viruses, but were afraid to ask.’ Come with
questions to ask a panel of experts on the topic of tuber necrotic diseases.
·
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.
» https://www.uidaho.edu/cals/potatoes/news/idaho-potato-conference
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/
