Search Results
Your search for "All Alerts" in All Alerts
yielded 2121 results.
Swipe Left or Right to navigate Alerts
Peach Twig Borer
Tree Fruits Treasure Valley
Peach Twig Borer
Posted on: June 15, 2016 by Dian Roberson
It is time to spray for Peach twig borer. This is a major pest of apricots, peaches, plums, and prunes. There are no known hosts outside the orchard. The larvae injure fruit and trees. Feeding on the buds and twigs occurs early in the season, after which the larva bores into the shoots, causing a characteristic "flagging" or wilting of the new growth. Later generations of larvae feed on shoots or fruit, disfiguring the fruit. Flagging of twigs indicates an infestation.
» http://insect.pnwhandbooks.org/tree-fruit/peach-and-nectarine/peach-and-nectarine-peach-twig-borer
» https://climate.usurf.usu.edu/includes/pestFactSheets/Peach-Twig-Borer.pdf
Pacific Northwest 2016 IPM Workshop
All Crops All Locations
Posted on: June 11, 2016 by Pam Hutchinson
Pacific Northwest 2016 IPM Workshop
*IPM Train-the-Trainer Working Group*
WHAT: A 2 1/2 day short course designed to train ag professionals, crop consultants, and university extension and research faculty at all experience levels on identification, management and control of insects, diseases, and weeds as well as need-to-know pest management tactics.
This hands-on learning experience will include field sampling and identification of major pests in the area plus creation of a mounted insect collection and weeds preserved in plant presses for your very own, take-home, information transfer/educational display.
WHEN: June 27-29, 2016.
WHERE: University of Idaho Aberdeen Research and Extension Center
1693 S. 200 W.
Aberdeen, ID 83210
DON’T MISS THIS OPPORTUNITY TO ENHANCE YOUR LEVEL OF EXPERTISE IN MULTIPLE DISCIPLINES!
· Enrollment is limited to 20 individuals at each site.
· There is a charge of $125 for the course. All handouts, most materials, equipment and supplies will be furnished.
· Webinars will be available before the class. USA experts will be presenting relevant material online.
INSTRUCTORS: Pamela Hutchinson, U of I Weed Specialist
Stuart Reitz, OSU Extension
Silvia Rondon, OSU Extension Entomologist Specialist
Steve Van Vleet, WSU Extension Specialist
If interested, please contact Pamela Hutchinson
Email: phutch@uidaho.edu
Phone 208-681-1304 or 397-4181
Funding for this course was provided in part by WSARE
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
Squash Bug
Landscape and Garden All Locations
Squash Bugs
Posted on: June 8, 2016 by Rich Guggenheim
Squash Bugs have been spotted in area home gardens on squash plants. To control, hand picking can be effective if done early. There are chemical control options as well. What works best for nymphs are products that contain spinosad. Adults can be controlled with pyrethrins. When using any pesticide, always read and follow all label instructions.
» https://www.youtube.com/watch?v=3aje4g4S_sY
» http://extension.usu.edu/files/publications/factsheet/ENT-120-08.pdf
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.
Clarification on “New strain of Tomato Late Blight detected in Idaho”
All Crops All Locations
late blight
Posted on: May 26, 2016 by Phillip Wharton
A point of clarification on the announcement that a “New strain of Tomato Late Blight detected in Idaho”: Late blight has NOT been found in Idaho this year yet in either tomatoes or potatoes. The strain of late blight referred to in the announcement is not new as it has been found in tomatoes and potatoes in 2013, 2014 and 2015, with a widespread outbreak in potatoes throughout SE Idaho last year. The purpose of the leaflet linked to in the previous announcement is to make home owner’s and growers aware of the potential threat of tomato late blight in home owners tomatoes to commercial potato fields. This is because the risk of an outbreak of late blight in potatoes this year is high due to the current cool wet weather and the potential that the late blight pathogen was able to over winter in volunteer potatoes due to the very mild winter conditions. For more information see http://bit.ly/1XSWHsS
New strain of Tomato Late Blight detected in Idaho.
Landscape and Garden All Locations
Late Blight in Tomatoes.
Posted on: May 25, 2016 by Rich Guggenheim
Late blight in tomatoes will likely be seen again this year in Idaho. There is a new highly infectious strain in Idaho this year, US23 which is pathogenic both to tomatoes and potatoes, and some research suggests even petunias.
Application of fungicides in the home garden are preventative only and not curative. Best management practices include avoiding water on leaves of plants and removing infected plants which may spread the disease.
Some varieties are resistant to late blight.
For more information, contact your local County Extension Office!
» http://www.ipm.ucdavis.edu/PMG/r783100211.html
» http://extension.oregonstate.edu/gardening/be-lookout-symptoms-tomato-late-blight
» https://extension.umaine.edu/publications/2427e/
» http://www.plantpath.wisc.edu/wivegdis/pdf/2015/Organic%20late%20blight%20control%202015.pdf
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
Paul Castrovillo "First 2016 Western Cherry Fruit Flies Captured in ISDA Monitor Trap"
All Crops All Locations
Western Cherry Fruit Fly
Posted on: May 20, 2016 by Rich Guggenheim
Now is the time to begin treatment for WCFF.
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.
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.
» http://jenny.tfrec.wsu.edu/opm/displaySpecies.php?pn=150
» http://wci.colostate.edu/Assets/pdf/western.cherry.fruit.fly.pdf
» https://extension.usu.edu/files/publications/factsheet/western-cherry-fruit-flies06.pdf
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.
Fire Blight on Apple and Pear Trees
Tree Fruits All Locations
Fire Blight
Posted on: May 18, 2016 by Dian Roberson
We are seeing a lot of fire blight on pears come into the Canyon County Extension Office! Fire blight is a bacterial disease that affects certain species in the rose family (Rosaceae). It is especially destructive to apples (Malus spp.), pears (Pyrus spp.), and crabapples (Malus spp.). It likes warm wet springs like the one we had this year. There is no cure for fire blight. Prevention is the best solution. Purchase resistant varieties, minimize rapid growth and succulent tissue, prune out blighted twigs and cankered branches. Check out the publications and websites below for more information.
» http://pnwhandbooks.org/plantdisease/pear-pyrus-spp-fire-blight
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.
