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corn earworm counts from July 25
Corn Treasure Valley
corn earworm
Posted on: July 25, 2017 by Jerry Neufeld
Corn earworm traps with pheromone lures were set out at 7 locations last week. Below are the moth counts taken from these traps on July 25. I have not seen moth counts this high for several years. I have also talked with industry people that say they are seeing a lot of moths this year.
Location 7/25/17/
Melba 51
South Nampa 3
South Caldwell 12
Huston 15
Homedale 10
Wilder 41
Middleton 5
Total 137
Psyllid monitoring update, 21 July 2017
Potato All Locations
Potato Psyllid
Posted on: July 21, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (4 fields), Gooding (1 field), Jerome (2 fields), Twin Falls (3 fields), Minidoka (1 field), Cassia (4 fields), Bingham (1 field), and Power (6 fields).
This week, we collected 33 psyllids from sticky cards (22 from Light sites and 11 from Intense sites).
We had traps deployed in 94 of the 95 fields that are being monitored this year and found psyllids in 22 of these 94 fields (23.4%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Overall psyllid numbers have been increasing during the past few weeks, which is not surprising given that psyllids tend to become more abundant later during the season. We continue to urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
Corn Earworm might be a bit early
Corn Treasure Valley
corn earworm
Posted on: July 17, 2017 by Jerry Neufeld
After I posted the forecasting alert about corn earworm a few days ago, I received an email stating that the summer generation of corn earworm moths has already made an appearance in the MIddleton area. The grower stated they have never had corn earworm before, but they have them this year. It could be that the models are off by a few days, regardless, with this information it would be wise to start scouting for corn earworm now.
Lso-positive psyllids in Jerome and Twin Falls counties
Potato All Locations
Potato Psyllid
Posted on: July 14, 2017 by Lucy Standley
Three psyllid collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. Two of these psyllids were found in Jerome County, the other was found in Twin Falls County.
Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (1 field) Elmore (1 field), Gooding (2 fields), Jerome (3 fields), Twin Falls (6 fields), Minidoka (2 fields), Cassia (4 fields), Bingham (1 field), and Power (7 fields).
This week, we collected 58 psyllids from sticky cards (31 from Light sites and 27 from Intense sites).
We had traps deployed in 93 of the 96 fields that are being monitored this year and found psyllids in 27 of these 93 fields (29%).
Overall psyllid numbers have been increasing during the past few weeks, which is not surprising given that psyllids tend to become more abundant later during the season. It is a little unusual that we are finding more psyllids in the Magic Valley than the Treasure Valley, which is opposite of the pattern we have observed over the last four years. Given the slight uptick in psyllid numbers and Lso incidence, we continue to urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
Corn Earworm 2017
Corn Treasure Valley
corn earworm
Posted on: July 12, 2017 by Jerry Neufeld
I am once again collaborating with Charter Seed Co. and Crookham Seed Co. on a project to trap corn earworm moths. Traps will be set out in corn fields at various locations near Dry Lake, Kuna, Melba, Middleton, Wilder, Homedale, and Caldwell. I will check the traps every few days and post the moth counts to this website.
The online Phenolgy and Degree Day Model (GDD) from Oregon State University is being used to estimate when the summer generation of corn earworm moths will emerge. This is the generation of moths that lay eggs in corn that is silking at the time when they emerge. The link to the GDD calculator for Corn Earworm is below.
The GDD model uses January 1 as a biofix, 55 and 92 as the temperature parameters and predicts the summer moths will emerge after 1300 GDD. These moths will then begin laying eggs in fresh corn silk. This model also estimates the eggs will hatch and larvae will begin feeding on corn ears 73 GDD later. According to this model, we will reach 1300 GDD in the Caldwell area about July 22, and will reach 1300 GDD in the Parma area about July 31. Egg laying in most, if not all, Treasure Valley locations will take place in this time frame. Larval feeding will begin 3 to 4 days later.
Traps will go out next week. The first moth counts will be posted a few days after the traps are set out.
The links below will take you to the websites where you can use the growing degree day model and also view various treatment methods based on the type of corn that you are growing.
» https://pnwhandbooks.org/insect/vegetable-seed/corn/corn-seed-corn-earworm-sweet-corn-only
» https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/corn-sweet-corn-earworm
» https://pnwhandbooks.org/insect/agronomic/field-silage-corn/field-silage-corn-corn-earworm
Iris yellow spot virus in Onion bulb fields
Onion Treasure Valley
Iris yellow spot virus / Onion thrips
Posted on: July 10, 2017 by Stuart Reitz
Iris yellow spot virus was detected at the end of last week in commercial onion fields in Malheur County, Canyon County, Payette County and Washington County. So far, only a few infected plants were found but no widespread outbreaks were found.
Maintaining good thrips management will help limit the spread and severity of the disease. Infective adult thrips spread the virus from plant to plant as well as within a plant. Infective juveniles also can spread the virus within a plant.
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.
2017 Summer Farm Festival and Malheur Experiment Station Field Day
All Crops All Locations
Posted on: July 10, 2017 by Janet Jones
Wednesday July 12, 2017
8:00 AM - 9:00 AM
Registration - All events and tours are open to the public
8:30 AM—9:30 AM
Tour A. Drone demonstration
9:30 AM - 10:20 AM
Tour B. Onion and potato drip irrigation tour. We will show case a study evaluating the response of multiple onion cultivars to the recently registered method of applying Outlook (dimethenamid-p) through drip irrigation. Evaluation of drip irrigation and comparison to sprinkler irrigation for potato in an attempt to lower the comparative cost of drip irrigation. Latest work on internal rot in onion.
10:30 AM - 11:50 AM
Tour C. Onions, Spuds, and More. Control of onion thrips. Control of potato psyllids. Weed control for onions, potatoes, corn, and sweet potatoes.
Tour D. Alternative Crops
This tour will highlight quinoa and wildflower seed production.
Tour E. Tour for youth. Wildlife, Solar Eclipse, Water, Soils, and Drones! A fun tour designed to educate young people about sage grouse, animal tracking and capture, the solar eclipse, the importance of water and soils, and modern drones.
12:00 Free Lunch
12:20 PM Update on GMO Creeping Bentgrass, Danielle Posch
12:30 PM Honoring our community members
UI Extension Cereals Field Days are this week in Rupert, Idaho Falls, and Aberdeen
Small Grains All Locations
Posted on: July 10, 2017 by Juliet Marshall
The southern / eastern Idaho Cereals Extension Field days will be
Tuesday (Rupert/Minidoka) July 11th
Wednesday (Idaho Falls) July 12th
Thursday (Aberdeen) July 13th
We will be speaking about varieties, diseases, insects and management issues. Hope to see you there!!
For times and locations, please see the attached PDF files.
First Lso-positive psyllid found in Power County this year
Potato All Locations
potato psyllids
Posted on: July 7, 2017 by Erik Wenninger
One psyllid collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. This psyllid was found in a field in Power County.
Psyllids were collected this week on sticky traps in potato in the following counties: Gooding (1 field), Jerome (5 fields), Twin Falls (2 fields), Minidoka (3 fields), Cassia (5 fields), and Power (4 fields).
This week, we collected 31 psyllids from sticky cards (21 from Light sites and 10 from Intense sites).
We had traps deployed in 95 of the 96 fields that are being monitored this year and found psyllids in 20 of these 95 fields (21.1%).
As always, we urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
Three Cereal Extension Field Days next week - Rupert / Minidoka, Idaho Falls and Aberdeen
Small Grains All Locations
Cereals Extension Field Days
Posted on: July 6, 2017 by Juliet Marshall
The southern / eastern Idaho Cereals Extension Field days will be
Tuesday (Rupert/Minidoka) July 11th
Wednesday (Idaho Falls) July 12th
Thursday (Aberdeen) July 13th
We will be speaking about varieties, diseases, insects and management issues. Hope to see you there!!
For times and locations, please see the attached PDF file.
Powdery Mildew and Spider MItes in Sugarbeets
Sugarbeets All Locations
powdery mildew and spider mites
Posted on: July 6, 2017 by Jerry Neufeld
Powdery mildew and spider mites have been found by Amalgamated Sugar Company Crop Consultants in the Roswell, Weiser and Adrian, Oregon areas. There are several fungicides available for use to treat powdery mildew. Depending on the disease pressure and chemistry used, applications with different chemistries should be repeated every 7 to 14 days. Contact your crop consultant from the Amalgamated Sugar Company if you have questions about treatment options for these pests.
Click on the links below for the powdery mildew and spider mite pages in the PNW Plant Disease and Insect Management Handbooks.
» https://pnwhandbooks.org/plantdisease/host-disease/sugar-beet-beta-vulgaris-powdery-mildew
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-spider-mite
June 30, 2017 – More psyllids found in Treasure and Magic Valleys
Potato All Locations
Potato Psyllid
Posted on: June 30, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Jerome (1 field), Cassia (1 field), Canyon (2 fields), and Minidoka (1 field).
This week, we collected 9 psyllids from sticky cards (3 from Light sites and 6 from Intense sites).
We had traps deployed in 93 of the estimated 96 fields (96.8%) that will be monitored this year and found psyllids in 5 of these 93 fields (5.3%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
Armyworms, Loopers and False Celery Leaftier in Sugarbeets
Sugarbeets Treasure Valley
army worms, loopers, False Celery Leaftier
Posted on: June 29, 2017 by Jerry Neufeld
Kevin Foulger, Crop Consultant with Amalgamated Sugar Company is reporting that loopers, armyworms and False Celery Leaftier have been found in sugarbeet fields on the west end of the Treasure Valley, mostly in the Adrian area. These pests will defoliate leaves, leaving only the leaf veins and petioles if left untreated. The links below will take you to the PNW Insect Management Handbook for control measures. I have also attached a couple of images provided by Kevin. If you have any questions, contact your Crop Consultant from Amalgamated Sugar Company for more information.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-armyworm
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-looper
» http://www.cals.uidaho.edu/edcomm/keys/plates/plate66.htm
» Armyworm
Malheur Experiment Station Field Day July 12
All Crops All Locations
Posted on: June 29, 2017 by Janet Jones
You are invited to the Malheur Experiment Station Summer Farm Festival and Annual Field Day!
Place: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
Date: Wednesday July 12, 2017
Registration starts at 8:00am with coffee and donuts
Click on the PDF below for the tour descriptions and schedule.
Also featured:
- Agricultural trade show booths!
- Events and contests with prizes!
A complimentary lunch will be served at noon.
Please RSVP for lunch or if you need more information call Jan Jones at (541) 889-2174 or email janet.jones@oregonstate.edu.
First potato psyllid found in Eastern Idaho during 2017 monitoring
Potato All Locations
Potato Psyllid
Posted on: June 23, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Twin Falls (2 fields), Cassia (1 field), Power (1 field), and Minidoka (1 field).
This week, we collected 7 psyllids from sticky cards (6 from Light sites and 1 from Intense sites).
We had traps deployed in 93 of the estimated 96 fields (96.8%) that will be monitored this year and found psyllids in 5 of these 93 fields (5.3%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
June 16, 2017 – More potato psyllids found in Magic Valley
Potato All Locations
Potato Psyllid
Posted on: June 16, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Twin Falls (1 field) and Jerome (1 field).
This week, we collected 2 psyllids from sticky cards (1 from Light sites and 1 from Intense sites).
We had traps deployed in 78 of the estimated 96 fields (81.2%) that will be monitored this year and found psyllids in 2 of these 78 fields (2.5%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
Thrips
All Crops Treasure Valley
Thrips
Posted on: June 16, 2017 by Dian Roberson
We have confirmed thrips on grapes and many other landscape ornamentals.Thrips are very tiny, skinny, insects, less than 0.05 inch long. Color varies from reddish-yellow to mid-dark brown. Thrips have rasping mouthparts and damage plants by sucking out the contents of plant cells and depositing tiny specks of honeydew. Damaged leaves look bleached and/or silvered and speckled with shiny "tar-spot" excreted by thrips during feeding. They can damage flower buds, opened flowers, leaf buds and leaves.
» https://pnwhandbooks.org/insect/hort/landscape/common/landscape-thrips
National Pollinator Week!
All Crops Treasure Valley
Posted on: June 16, 2017 by Dian Roberson
Join us for a week full of fun events in Canyon County!
Saturday, June 17 – Kick off the week at the Nampa Farmers Market 9:00 am – 1:00 pm. Kids of all ages can get free flower seeds to attract pollinators!
Monday, June 19 - Join us at 1904 E Chicago Ave from 7:00 – 9:00 pm Rich Guggenheim will talk about Pollinator Gardens.
Tuesday, June 20 - Backyard Honey Bees 7:00 – 9:00 pm. 1904 E Chicago Ave in Caldwell. 208-459-6003.
Wednesday, June 21 –Caldwell Farmers Market 3:00 – 7:00 pm kid’s activities and information about attracting pollinators. 4:30 City of Caldwell Pollinator Proclamation!
Thursday, June 22 –Nampa Library 1:00 – 3:00 pm Pollinators all a Buzz!! Create a flower seed bomb.
Friday, June 23 –West Park in Nampa with Canyon County Master Gardeners make insect hotels. Construct and take home a mini bee board. We will dedicate our Bee-Inn 7-9 PM
Saturday, June 24 – Join us at 9 AM for the Grand Finale at the Northern Lights Theatre in Nampa for a showing of Disney’s “Wings of Life!” Contact Northern Lights Theatre for ticket information. 208- 475-2999
U of Idaho Parma Field Day - 2017
All Crops All Locations
Posted on: June 16, 2017 by Jerry Neufeld
This is a reminder that the University of Idaho Parma R and E Center will be hosting a Field Day on the morning of June 21, 2017. Stop by and visit with our faculty and staff about our 2017 research projects, see our facility and have lunch and refreshments with us. Please RSVP by calling 722-6701 or emailing laphillips@uidaho.edu to let them know you plan to attend. Idaho Pesticide Applicator Recertification and CCA credits will be issued. For additional information visit our web site, http://www.uidaho.edu/cals/parma-research-and-extension-center , or click on the pdf below.
Cereal Field Days - Schedule for Southern / Eastern Idaho
All Crops All Locations
Pests and Varieties of Wheat and Barley
Posted on: June 12, 2017 by Juliet Marshall
Attached is the schedule for the Southern / Eastern Idaho Cereal-related Field Days hosted by the UI Extension and Agricultural Experiment Stations.
First potato psyllids found in Treasure Valley
Potato All Locations
Potato Psyllid
Posted on: June 9, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Cassia (1 field) and Canyon (2 fields).
This week, we collected 3 psyllids from sticky cards (1 from Light sites and 2 from Intense sites).
We had traps deployed in 67 of the estimated 96 fields (69.7%) that will be monitored this year and found psyllids in 3 of these 67 fields (4.4%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
Western Cherry Fruit Fly (WCFF) Announcement 2017
Cherry Treasure Valley
Western Cherry Fruit Fly
Posted on: June 9, 2017 by Paul Castrovillo
On May 26 the first Western Cherry Fruit Fly captured in an Idaho State Department of Agriculture WCFF trap in Nampa, ID was reported. Two more WCFF were found today (June 7) in traps set up in Emmett, ID during early May. If treatment for WCFF is not already underway it should begin now.
For more information contact Paul Castrovillo at paul.castrovillo@isda.idaho.gov or call 208-332-8627
» https://pnwhandbooks.org/insect/tree-fruit/cherry/cherry-western-cherry-fruit-fly
Snake River Weed Research Tour at the Malheur Experiment Station on June 14
Announcements Treasure Valley
Posted on: June 7, 2017 by Bill Buhrig
It is time for the annual Weed Research Tour at the Malheur Experiment Station! The public is invited to attend. Read on for more information!
Place: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
Date: Wednesday, June 14, 2017
Registration starts at 8:00am with coffee and donuts
The tour will start promptly at 8:30AM and end at 12:00PM.
A complementary lunch will be served at the conclusion of the tour.
Pesticide recertification credits for Idaho and Oregon will be available
The tour will feature research studies for weed management in direct-seeded onion, sugar beet, field corn, sweetpotato, wheat, and potato. The first stop will be at our yellow nutsedge “field laboratory” along Hwy 201 just before crossing the rail tracks (if headed north to Ontario from Nyssa). The stop along Hwy 201 will feature studies on yellow nutsedge control in onion, sugar beet, and field corn. We will then proceed to the station and tour studies on weed control in direct-seeded onion, sweetpotato, field corn, and potato.
Please call 541-889-2174 or email janet.jones@oregonstate.edu if you need more information. Please check out the link for more events coming your way from the good folks at the Malheur Experiment Station.
Seed Piece Decay Due to Soft Rot
Potato Eastern Idaho
Pectobacterium spp.
Posted on: June 5, 2017 by Kasia Kinzer and Phillip Wharton
In the past few weeks we received three separate unrelated calls regarding poorly performing and rotting potato seed pieces in fields in eastern Idaho. Based on field visits and samples that were brought in to the extension seed potato lab in Idaho Falls, the predominant problem appears to be soft rot. The common theme of these samples were that they were from fields which were waterlogged, and most of the seed pieces that we looked at had enlarged lenticels.
Soft rot is caused by bacteria that produce pectolytic enzymes that break down pectin (polysaccharides found in plant cell walls). The soft rot pathogens can also grow and reproduce in environments where oxygen levels are low, a situation that can occur in wet soil. Soft rot pathogens need wounds or enlarged lenticels to gain entry into the potato tuber. They are not able to breach an intact, healthy, uncompromised tuber, which is why soft rot often appears after seed piece decay caused by Fusarium species. More rarely in Idaho, soft rot may follow seed piece decay caused by Pythium leak or late blight. Another important note about soft rot pathogens is that, although they can be tuber-borne, they can also be found in soil and water in the environment.
The seed pieces had been treated with a fungicide dust treatment immediately after cutting, and consequently, low levels to no Fusarium dry rot were observed on the samples. In all three cases, the fields were planted within 48 hours of seed being cut, which means the wounds from cutting were not fully healed. Our spring was particularly wet in most locations across Idaho. The combination of the enlarged lenticels, likely due to wet field conditions, and unhealed wounds on seed pieces planted in wet soils seems to have created the perfect environment for soft rot to thrive.
Unfortunately, there are few measures that can be taken to control soft rot after planting apart from drying out the soil to the extent possible, such as by shutting off or reducing irrigation. In some cases, if soft rot has affected over 50% of the field, and there is sufficient seed available, the grower may want to consider plowing up the field waiting for it to dry out sufficiently and the soil temperature to rise above 55F and then re-planting.
For more information see the attached links or visit www.idahopotatodiseases.org
» http://www.idahopotatodiseases.org/bacterial_soft_rot.html
More potato psyllids found in Magic Valley
Potato All Locations
Potato Psyllid
Posted on: June 2, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Gooding (1 field), Jerome (1 field), and Minidoka (1 field).
This week, we collected 6 psyllids from sticky cards (2 from Light sites and 4 from Intense sites).
We had traps deployed in 57 of the estimated 83 fields (68.6%) that will be monitored this year and found psyllids in 3 of these 57 fields (5.2%).
As always, we urge growers and crop consultants to have an IPM program 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 in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
