Crop Alerts
Showing 25 most recent Crops alerts
Swipe Left or Right to navigate Alerts
More psyllids found in Treasure Valley; none in Magic Valley - June 10, 2016
Potato All Locations
potato psyllid
Posted on: June 11, 2016 by Amy Carroll
All of the psyllids collected last week tested negative for Lso, the bacterium that causes zebra chip.
Psyllids were collected this week on sticky traps in potato in the following counties: Payette (3 fields), Owyhee (1 field), Canyon (13 fields), Ada (2 fields), and Elmore (1 field).
We had traps deployed in 82 of the estimated 107 fields (76.6%) that will be monitored this year and found psyllids in 20 of these 82 fields (24.3%).
As always, we urge growers and crop consultants to have an IPM program in place. More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the links below.
http://www.uidaho.edu/extension/news/psyllid-management
Detailed results from the “Light” sites can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
Iris Yellow Spot Virus detected in Onions
All Crops All Locations
Iris yellow spot virus / onion thrips
Posted on: June 5, 2016 by Stuart Reitz
Iris yellow spot virus was detected this week in Malheur County and Payette County.
The early appearance of virus points out the need for onion growers to be vigilant in their thrips control programs.
In addition to thrips management, minimize stress on onion plants by making sure fields are maintained at an adequate but not excessive fertility level, and that the soil moisture is kept at about the 20 centibar level. This will help reduce the severity of virus symptoms.
Please contact Stuart Reitz at Malheur County Extension (541-881-1417 / stuart.reitz@oregonstate.edu) if you have questions about your onion fields or would like assistance with virus diagnosis.
First potato psyllid found in Magic Valley potato field this season
Potato All Locations
potato psyllids
Posted on: June 3, 2016 by Erik Wenninger
We collected our first potato psyllid from the Magic Valley this year, on a sticky card deployed in potato. In addition, we collected psyllids from several fields in the Treasure Valley. Psyllids were collected this week on sticky traps in potato in the following counties: Malheur (Oregon), Canyon (4 fields), Ada (2 fields), and Twin Falls.
We know from previous years that psyllids tend to occur earlier and in greater numbers in the Treasure Valley, and patterns observed thus far this year are consistent with this.
We had traps deployed in 68 of the estimated 107 fields (63.6%) that will be monitored this year and found psyllids in 4 of these 68 fields (11.8%).
On another note, of five potato psyllids collected in vacuum samples from bittersweet nightshade on May 17 from Shoshone Falls Park, three were positive for liberibacter (Lso), the bacterium that causes zebra chip.
As always, we urge growers and crop consultants to have an IPM program in place. More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the links below.
http://www.uidaho.edu/extension/news/psyllid-management
Detailed results from the “Light” sites (from which the two psyllids were found) can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
Volunteer Potato Management
Potato All Locations
Volunteer potatoes
Posted on: June 3, 2016 by Pam Hutchinson
Here’s an update to the recent article by Pamela Hutchinson, Potato Cropping Systems Weed Scientist at the University of Idaho Aberdeen R&E Center in SE Idaho, on methods for controlling volunteer potatoes. As previously mentioned, due to the mild winter experienced in the Pacific Northwest, tubers left after the 2015 harvest can and did survive. At this point in time (first week of June), volunteer plants may be past the tuber initiation, which has been shown to be the best stage for application of many herbicides for effective control, and to prevent re-sprouting and tuber production. However, that is not the case for all fields.
In addition, there are reports of newly emerging sprouts/plants after fields appear to have been sprayed. Fields should be monitored closely after an application in order to determine if further actions are needed!
Thanks,
Pam
First Lso-positive potato psyllids found in Idaho potato fields this season
Potato All Locations
potato psyllids
Posted on: June 2, 2016 by Erik Wenninger
Both of the potato psyllids found last week (one in each of two potato fields in Canyon County) tested positive for liberibacter (Lso; the bacterium that causes zebra chip).
A more detailed update of trapping results from the past week will be posted on Friday.
We continue to urge growers and crop consultants to implement IPM programs for zebra chip. 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/extension/news/psyllid-management
Idaho Wheat Commission and UI-CALS wireworm survey
Small Grains All Locations
wireworm
Posted on: June 1, 2016 by Jerry Neufeld
Dr. Cathy Wilson (Director of Research Collaboration) from the Idaho Wheat Commission and Dr. Arash Rashad from the UI-CALS Department of Plant, Soil, and Entomological Sciences are conducting a survey about the impact of wireworm in cereals production. Wireworm has been a serious pest in cereals due to limited management options. The only registered chemistry in cereals, i.e. neonicotinoid seed treatment, has provided limited protection and wireworms continue to be a major challenge to Idaho producers. The pest is wide spread and is present across southern and northern Idaho. Previous research conducted in Canada has shown that fipronil causes considerable mortality in wireworms and the IWC and UI-CALS need this survey information to initiate a section 18 application for growers that are greatly suffering from this pest. Results from this survey will also be used to highlight producers/industry concerns about this pest, and will assist in approaching various sources of funding to support research on wireworm management in the PNW and intermountain regions. Please take a few minutes to complete this survey about an important pest in cereals. Start by clicking on the link below.
» http://www.surveygizmo.com/s3/2742917/Economic-impact-of-wireworm
Malheur Experiment Station Weed Research Tour on June 9th
All Crops All Locations
Posted on: May 31, 2016 by Bill Buhrig
The Malheur stop of the Snake River Weed Research Tour will be in Ontario, OR on June 9th starting @ 8AM at the Experiment Station. Please see the attachment for more information. This is free to the public and pesticide recertification credits are going to be available. There will even be lunch!
Potato Psyllids in Malheur County
Potato All Locations
Potato Psyllid
Posted on: May 29, 2016 by Stuart Reitz
We collected our first potato psyllids of the season from sticky cards in Malheur County potato fields. Two psyllids were found – one in each of two potato fields.
For information and resources on potato psyllids and zebra chip, including management and scouting recommendations, please see the following article: http://www.nwpotatoresearch.com/IPMStuff/PDFs/PotatoPsyllid.pdf.
Additional information on pest management in potatoes in the PNW is available at:
http://www.nwpotatoresearch.com/IPMStuff/PDFs/NorthwestInsectGuidelines.pdf
» http://www.nwpotatoresearch.com/IPMStuff/PDFs/PotatoPsyllid.pdf
» http://www.nwpotatoresearch.com/IPMStuff/PDFs/NorthwestInsectGuidelines.pdf
Iris yellow spot virus in Volunteer Onions
Onion All Locations
Iris yellow spot virus / onion thrips
Posted on: May 28, 2016 by Stuart Reitz
Iris yellow spot virus (IYSV) was detected in volunteer onions in the Ontario, OR area. Characteristic necrotic, diamond-shaped lesions were found on flower scapes. Volunteer onions can serve as a source of virus-infected thrips to move into this season's onion crop.
Although the virus has not yet been found in this season's bulb fields, please continue to monitor fields carefully for thrips. Thrips populations have grown substantially over the past week, and the high temperatures forecast for later next week will further increase thrips development and population growth.
Reducing overall stress on onions will help reduce the severity of damage from thrips and virus
If you see potentially symptomatic plants that you would like tested for virus or have questions about thrips and the virus, please contact Stuart Reitz, Malheur County Extension, 541-881-1417.
First potato psyllids found in Idaho potato fields this season
Potato All Locations
potato psyllids
Posted on: May 27, 2016 by Erik Wenninger
May 27, 2016 – First potato psyllids found in Idaho potato fields this year
We collected our first potato psyllids of the season from sticky cards in Idaho potato fields. Two psyllids were found – one in each of two potato fields in Canyon County. We found our first potato psyllids at a similar time last year.
Sticky cards have now been deployed in 66 of the estimated 97 fields that will be included in the monitoring program this year.
We urge growers and crop consultants to have an IPM program in place. 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/extension/news/psyllid-management
Detailed results from the "Light" sites (from which the two psyllids were found) can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the "Intense" sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
“Heads up” for Volunteer Potato Control in other crops.
All Crops All Locations
Posted on: May 26, 2016 by Phillip Wharton
With the very mild winter weather conditions this year a lot of volunteer potatoes survived over winter. Growers are now seeing a lot of problems with volunteer potatoes in other crops such as corn, sugar beet, wheat and onions. Volunteer potatoes can be very hard to eliminate if the correct control measures are not taken at the most appropriate time. The potato tuber initiation stage has been shown to be the best time for herbicide application in order to kill the volunteer potato plant, prevent re-sprouting, and prevent tuber production. Attached, Dr. Pamela Hutchinson, Potato Cropping Systems Weed Scientist, has put together a great article on methods for controlling volunteer potatoes in other crops.
Update of potato psyllid monitoring in Idaho - 20 May 2016
All Crops All Locations
potato psyllids
Posted on: May 20, 2016 by Erik Wenninger
This week we collected our first sticky cards of the season from potato fields. No potato psyllids were found in potato fields this week. Sticky cards had been deployed in only 27 of the estimated 96 fields that will be included in the program this year, but quite a few more sites were established this past week.
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/extension/news/psyllid-management
First 2016 Western Cherry Fruit Flies Captured in ISDA Monitor Trap
Cherry All Locations
Western Cherry Fruit Fly
Posted on: May 20, 2016 by Paul Castrovillo
Four specimens of Western Cherry Fruit Fly (Rhagoletis indifferens) were found in an Idaho State Department of Agriculture WCFF survey trap in Canyon County that was checked on May 16. These were the first specimens captured in 2016. Our traps in Gem County, checked the same day, contained no WCFF, however, historically we expect to find them there about a week after the initial catch in Canyon County.
Now is the time to begin treatment for WCFF.
Please check with your local county extension educator or crop consultant for the situation in your area and for proper chemical recommendations and application methods if necessary.
2016 Potato psyllid monitoring program underway in Idaho
Potato All Locations
potato psyllids
Posted on: May 13, 2016 by Erik Wenninger
The University of Idaho, in collaboration with Miller Research and several crop consultants across the state will continue our monitoring program for potato psyllids, zebra chip, and liberibacter (Lso), the bacterium that causes zebra chip. The monitoring program covers commercial potato fields throughout southern Idaho and is funded in part by IPC, USDA, and generous in-kind contributions by our collaborators.
The first deployment of sticky cards on several of our sites occurred during the past week. More details on the program will be forthcoming, but it will be similar to what we’ve done over the last three years.
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/extension/news/psyllid-management
Stripe rust in wheat and barley
Small Grains All Locations
stripe rust of wheat
Posted on: May 13, 2016 by Juliet Marshall
Stripe rust continues to spread and is now affecting susceptible spring wheat (UI Pettit) as well as winter wheat. From Oregon to Eastern Idaho, be prepared to apply fungicides to susceptible and moderately susceptible varieties. The fungi infect, take a week or two to develop, and suddenly stripe rust pustules appear seemingly overnight. The application of triazole fungicides are critical in reducing the impact on crops that are already infected, so triazoles and mixed mode of action fungicides are needed to stop the fungi in fields that already have infections. Click on the Cereals Project link to access a Fungicide Efficacy Table and more information about this disease.
Stripe rust in barley has been reported - but at low levels and in one field. This is a different strain, and stripe rust of wheat does not cause stripe rust in barley. Scout fields of wheat and barley, and report occurrence, location and variety to me at jmarshall@uidaho.edu. Thank you to all who have sent me pictures and outbreaks!
Stripe rust in Malheur County
Wheat Northern Idaho
Stripe Rust
Posted on: May 12, 2016 by Bill Buhrig
Stripe rust is being observed in wheat fields between Nyssa and Ontario. This falls in line with previous discoveries of stripe rust in neighbors areas including at the Parma R and E Center. As Juliet Marshall (U of I Aberdeen) suggests, weekly scouting is key and working with your crop consultant is important. Please see the link to the PNW Disease Handbook for more information.
» http://pnwhandbooks.org/plantdisease/wheat-triticum-aestivum-stripe-rust-yellow-rust
Stripe Rust in Parma Area
Wheat Treasure Valley
stripe rust
Posted on: May 11, 2016 by Jerry Neufeld
Dr. Oliver Neher (AMSCO Pathologist) and Dr. Olga Walsh (UI Parma Research and Extension Center) have found and confirmed stripe rust in the winter wheat nursery plots at the University of Idaho, Parma R&E Center.
Below is information Dr. Juliet Marshall (University of Idaho Cereals Extension Specialist) posted on this website regarding stripe rust a few days ago.
I highly recommend that anyone with a field of Brundage examine it closely for stripe rust, looking especially at lower leaves that could have been infected last fall. Snow cover protects wheat as well as the stripe rust from freezing temperatures. Fields that have been under snow will serve as good reservoirs for stripe rust to carry into our spring wheat.
All susceptible varieties should be scouted weekly from now on. Please report infected fields (the approximate location) and send pictures so I can keep alerts updated as the season progresses (jmarshall@uidaho.edu). This helps everyone!
Strobilurin fungicides are excellent preventative fungicides, as are triazoles. Triazoles (or triazole and strobilurin mixes) are more effective if there is a field with established infections. The attached table is (not a complete) list of fungicides put together by a group of pathologists belonging to the NCERA-184, with ratings for degree of control of several wheat diseases.
At this point:
1) Spray fungicides at herbicide timing on susceptible varieties of winter wheat.
2) Select resistant spring varieties, if possible.
3) Be prepared to spray susceptible winter and spring varieties as needed to protect from yield loss - this may be two or more applications of fungicides during the growing season.
4) Scout ALL varieties as there are sometimes changes in the fungal strains, and those varieties that are currently resistant may become susceptible if there are race changes in the fungi.
The use of resistant varieties is the most sustainable and economically viable method of stripe rust control. Breeders work hard to develop resistant varieties in order to help growers save input costs. It is not necessary to spray resistant varieties – in fact, not spraying resistant varieties will contribute to longer-term effectiveness of available fungicides.
» http://www.uidaho.edu/extension/cereals/scseidaho
» http://pnwpestalert.net/uploads/Stripe_Rust_Alert_4-5-16.pdf
» http://pnwpestalert.net/uploads/NCERA_184_Wheat_fungicide_table_2016_V1.pdf
May 9th Tree Fruit Pest Advisory
Tree Fruits All Locations
Codling Moth, Aphids, Fire Blight, Thinning
Posted on: May 9, 2016 by Tony McCammon
Codling moth is in early hatch for most of Southwestern Idaho. Southern and Eastern Idaho are not far behind. open the attached pest advisory for more information on Codling moth management.
Wildflower Day is May 12th at the Malheur Experiment Station!
All Crops All Locations
Posted on: May 2, 2016 by Bill Buhrig
Everyone is invited to attend the Native Wildflower Seed Production Field Day at the Malheur Experiment Station on May 12. Registration starts at 8am and lunch will be served. The flier is attached with more details. It is requested that attendees RSVP so we can get a head count for lunch. Call 541-889-2174 to RSVP or ask any questions you may have. It will be a good time!
sugarbeet root maggot, 2017
Sugarbeets Treasure Valley
sugarbeet root maggot
Posted on: April 26, 2016 by Jerry Neufeld
The degree day calculator (hosted by the Integrated Plant Protection Center at Oregon State University; http://uspest.org/cgi-bin/ddmodel.us) for the sugar beet root maggot fly shows that—depending on your location in the Treasure Valley—we have accumulated nearly 360 growing degree days since January 1, 2017. Peak flight of root maggot flies should occur after 360 accumulated growing degree days when the maximum high temperature exceeds 80 degrees F. In the Treasure Valley this will be very soon.
Root maggot flies will lay eggs near sugarbeet plants. After the larvae hatch they will begin feeding on the young sugarbeets. Look for these pests to appear in the western end of the Treasure Valley first. If you haven’t applied a treatment for sugarbeet root maggot, now is the time to do so. The link below from the 2017 PNW Insect Management handbook contains additional information. Visit with your field consultant from AMSCO for treatment options.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-sugar-beet-root-maggot
» http://uspest.org/cgi-bin/ddmodel.us
» sugarbeet root maggot larvae
Parma/Malheur Cropping Systems Agronomy Field Day - JUNE 20, 8:30 AM
All Crops Treasure Valley
Posted on: April 25, 2016 by Olga Walsh
Contact information: Olga Walsh (University of Idaho, Parma R&E Center): owalsh@uidaho.edu; Bill Buhrig (Oregon State University, Malheur ES): William.Buhrig@oregonstate.edu
LOCATION: University of Idaho, Parma R&E Center, 29603 U of I Lane, Parma, ID, 83660.
Time Activity
8:30 am – 9:00 am Registration
9:00 am – 12 noon Touring the experimental plots/demos
12:00 noon – 1 pm Lunch/indoor presentations
Crops/topics covered: winter & spring wheat, beans, corn, fresh peas/mustard/wheat rotations, nutrient management, water management, weed management, unmanned aerial vehicles, crop sensors. Detailed information will follow shortly.
Please consider to attend/present and spread the word about the field day.
Weevil in Forage Alfalfa
Alfalfa Northern Idaho
Weevil
Posted on: April 20, 2016 by Bill Buhrig
Weevil are being found in forage alfalfa fields in Malheur County. They are more likely to be approaching damage thresholds in older stands. Please refer to the attached link for more information and work with your crop consultants to determine if a treatment is necessary. Be aware of pre-harvest intervals and how they may interfere with your timing when swathing first cutting. In some instances, swathing may make more sense than applying a plant protectant product.
» http://insect.pnwhandbooks.org/hay-pasture/alfalfa/alfalfa-hay-alfalfa-weevil
Lygus Emergence in Alfalfa Seed
Alfalfa Seed Treasure Valley
lygus bug
Posted on: April 19, 2016 by Jerry Neufeld
Thanks to Dr. Jim Barbour, IPM Specialist at the University of Idaho, SW Idaho Research and Extension Center (Parma) for providing this information about Lygus emergence in alfalfa seed.
The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition (http://pnwpest.org/cgi-bin/ddmodel.pl?spp=lyg) shows that, depending on your location in the Treasure Valley, we have accumulated 137 degree days between January 1, 2016 and April 19, 2016. Peak emergence of lygus bug 1st and 2nd instar nymphs should occur right around 272 accumulated degree days: this usually occurs around mid-May, and is the time monitoring for lygus bugs in alfalfa seed fields should begin. Right now peak emergence is predicted to occur about the first week of May ( ~May 5). This is about 8 days ahead of the 30 year average.
When using most insecticides, fields should be treated when numbers of lygus bugs reach 4-5 lygus bug nymphs per 180 degree sweep. Growers using Assail, or Beleaf, as stand-alone sprays probably should treat before 4th instar nymphs are detected. You can monitor degree day accumulation using the link provided above as follows:
1) Select the location nearest you by selecting the appropriate pin in the map at the top of the page. The above data are for the Parma location. Results likely will vary depending on the location selected.
2) Select “insects” in the category drop down box under the map, then select the “Lygus bug [alfalfa seed] Ben Simko 2000” model from the “model Parma” drop down box.
3) The predicted date for the 275 degree day accumulation for peak 1st and 2nd instar lygus nymphs will be listed in the “DDs Event” text box. You also can view the full model output by selecting the button labeled “Click here to CALC/ RUN model w/daily output.”
FSMA (Food Safety Modernization Act) Outreach Meeting - April 26
All Crops All Locations
Posted on: April 18, 2016 by Stuart Reitz
FSMA outreach/informational meeting
Tuesday, April 26, 6-8 p.m.
Clarion Inn, 1249 Tapadera Avenue, Ontario, Oregon
The Idaho State Dept Agriculture (ISDA) will host an informational meeting for growers on the status of the FSMA (Food Safety Modernization Act) rules.
This session will focus on the Produce Safety Rule, which relates to on-farm activities for raw agricultural commodities, and the Preventative Controls for Human Food Rule, which covers food manufacturing.
Onions and tree fruits are examples of commodities that are subject to the FSMA Produce Safety Rule.
Please plan to attend if you have questions regarding FSMA in relation to your farm or processing facility operation.
RSVP by April 22 to: Candi Fitch, Idaho Fruit and Vegetable Association, Executive Director, at (208) 722-5111, or candif@cableone.net.
ISDA Pesticide Disposal Program 2016
All Crops All Locations
Posted on: April 18, 2016 by Jerry Neufeld
Idaho State Department of Agriculture is conducting a pesticide disposal program May 9 and 10, at Nampa and Weiser. The pdf below has detailed information.
