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Temperatures and psyllid abundance decrease
Potato All Locations
Potato Psyllid
Posted on: September 22, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (3 fields) Gooding (1 field), and Power (1 field).
This week, we collected 50 psyllids from sticky cards (all from Intense sites).
Many of the 95 fields that were in the monitoring program are being vine killed or harvested. We had traps deployed in 19 of the remaining fields and found psyllids in 5 of these 19 fields (26.3%). However, we are waiting to receive cards from an additional 21 Light sites.
Thus far, all psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip. However, with the increased trap captures during the last two weeks, some psyllids remain to be tested.
The dip in psyllid captures is almost certainly related to the cooler, rainy weather (in addition to the fact that fewer fields are still being monitored). Despite the rise in psyllid abundance during the previous 2-3 weeks, Lso incidence remains far lower than we’ve ever recorded for a season. Risk of ZC continues to appear relatively low as the season winds down.
We expect all of the remaining fields being monitored to undergo vine kill within the next two weeks.
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.
Psyllid captures continue to rise, but season Lso incidence still remains low
Potato All Locations
Potato Psyllid
Posted on: September 15, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Payette (1 field), Canyon (9 fields), Elmore (1 field), Gem (1 field), Gooding (1 field), Twin Falls (5 fields), Jerome (2 fields), Minidoka (1 field), Cassia (7 fields), and Power (2 fields).
This week, we collected 243 psyllids from sticky cards (94 from Light sites and 149 from Intense sites).
Many of the 95 fields that were in the monitoring program are being vine killed or harvested. We had traps deployed in all 70 of the remaining fields and found psyllids in 30 of these 70 fields (42.8%).
This week we found 39 nymphs in leaf samples from one site in Canyon county.
Thus far, all psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Although psyllid abundance is rising, Lso incidence remains far lower than we’ve ever recorded for a season.
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.
Psyllid captures continue to rise, but season Lso incidence remains low
Potato All Locations
Potato Psyllid
Posted on: September 8, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Payette (1 field), Canyon (10 fields), Elmore (2 fields), Gem (1 field), Gooding (1 field), Twin Falls (5 fields), Jerome (3 fields), Cassia (3 fields), Power (1 fields), and Bingham (1 field).
This week, we collected 126 psyllids from sticky cards (70 from Light sites and 56 from Intense sites).
Many of the 95 fields that were in the monitoring program are being vine killed or harvested. We had traps deployed in all 67 of the remaining fields and found psyllids in 28 of these 67 fields (41.8%). However, we are still waiting to receive cards from 10 light sites.
This week we found 3 nymphs in leaf samples from Canyon county and 4 adults in vacuum samples from Gooding and Twin Falls counties. This is the first incidence of immature psyllids in our samples this year, which is not surprising at this point in the season.
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
The late-season rise in psyllid captures is consistent with the general pattern we’ve observed for the last five years. However, overall psyllid abundance is still only about 5-10% of what we saw last year at this time, and Lso incidence so far is lower than we’ve ever recorded for a season (1.33%).
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.
Fall 2017 Dig In Newsletter
Announcements All Locations
Posted on: September 5, 2017 by Rich Guggenheim
Dig into some great tips on fall gardening in this year's fall edition of Dig In.
2017 Treasure Valley Tomato Taste off
Announcements All Locations
Posted on: September 5, 2017 by Rich Guggenheim
Join us on September 16th from 10 am to 2 pm for the Treasure Valley Tomato Taste off.
Uptick in psyllid abundance as season winds down
Potato All Locations
Potato Psyllid
Posted on: September 1, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (9 fields), Gem (1 field), Gooding (1 field), Twin Falls (7 fields), Jerome (2 fields), Cassia (1 field), Power (2 fields), and Bingham (1 field).
This week, we collected 59 psyllids from sticky cards (39 from Light sites and 20 from Intense sites).
As the season winds down, some of the 95 fields that were in the monitoring program are being vine killed or harvested. We had traps deployed in all 88 of the remaining fields and found psyllids in 24 of these 88 fields (27.2%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Typically we see a spike in psyllid abundance during late August to September, which may explain the uptick in psyllid numbers this week. However, overall psyllid abundance is still only about 5-10% of what we saw last year at this time.
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.
Unusable pesticide disposal
All Crops All Locations
Posted on: September 1, 2017 by Jerry Neufeld
Idaho State Department of Agriculture is announcing their fall schedule for collecting unusable pesticides. Click on the pdf below for more information.
Psyllid monitoring update, 25 August 2017
Potato All Locations
Potato Psyllid
Posted on: August 25, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Payette (1 field), Canyon (6 fields), Gem (1 field), Gooding (1 field), Twin Falls (5 fields), Jerome (2 fields), Minidoka (1 field), and Power (1 field).
This week, we collected 32 psyllids from sticky cards (22 from Light sites and 10 from Intense sites).
As the season winds down, some of the 95 fields that were in the monitoring program are being vine killed or harvested. We had traps deployed in 91 of the 92 remaining fields and found psyllids in 18 of these 91 fields (19.8%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Typically we see a spike in psyllid abundance during late August to September, but this continues to be a relatively “quiet” year for potato psyllids. We will have to wait and see what the coming weeks bring.
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.
No Late Blight in Potatoes yet in 2017
All Crops All Locations
Late Blight
Posted on: August 20, 2017 by Kasia Duellman Kinzer
No confirmed reports of late blight in Idaho as of August 17, 2017 – But
Don’t let your guard down
We have received no confirmed reports of late blight on potatoes in Idaho as
of August 18, 2017. However, it’s important that we don’t let our guard
down. Over the years, when outbreaks do occur in Idaho they tend to come at
this time of the year when the nights are getting longer and dew and
humidity lingers in the canopy later into the morning. The appearance of
late blight this time of year puts tubers at greater risk of infection, and
as long as plants have green tissue, diligent monitoring for this disease
should continue.
Late blight has been reported in the Columbia Basin in Washington, but there
have been no reports of late blight in Oregon.
The strain of the late blight pathogen (Phytophthora infestans) that is
prevalent in Idaho, US-23, can infect tomatoes as easily as it infects
potatoes. With the recent cool wet weather we have experienced in south
eastern Idaho, growers who have potato fields near housing subdivisions
should consider scouting for symptoms of late blight in low lying areas or
areas which stay wet longer next to the subdivisions, since late blight may
spread from garden tomatoes to surrounding potato fields. Timely diagnosis
of late bight is vital for successful management of this disease.
If you happen to grow tomatoes, it’s critically important to monitor your
garden tomatoes, too. We encourage samples of potato or tomato suspected to
be infected with late blight to be sent to University personnel for
confirmation.
If you think that you have late blight in your potato field or garden
tomatoes, please submit a sample to the University of Idaho for
confirmation. For southwestern Idaho (and Malheur Co. Oregon), contact
University of Idaho personnel at the Parma Research and Extension Center at
208-722-6701; for south central Idaho, contact the Kimberly Research and
Extension Center at (208) 423-4691; and for southeastern Idaho, contact the
Idaho Falls Research and Extension Center at (208) 529-8376 or the Aberdeen
Research and Extension Center at (208) 397-4181.
This information provided by Drs. Kasia Duellman and Phillip Wharton, University of Idaho
Psyllid monitoring update, 18 August 2017
Potato All Locations
Potato Psyllid
Posted on: August 18, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Owyhee (1 field), Canyon (5 fields), Gooding (1 field), Twin Falls (5 fields), Jerome (2 fields), Minidoka (1field), Cassia (1 field), and Power (2 fields).
This week, we collected 33 psyllids from sticky cards (23 from Light sites and 10 from Intense sites).
We had traps deployed in 93 of the 95 fields that are being monitored this year and found psyllids in 18 of these 93 fields (19.3%).
Thus far, all psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
This continues to be a relatively “quiet” year for potato psyllids. For perspective, during August last year we were collecting hundreds of psyllids per week with similar sampling effort.
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.
Contaminated Azadirachtin Organic Insecticides - Recall Notice
All Crops All Locations
Posted on: August 18, 2017 by Ronda Hirnyck
University of Arizona Extension Faculty put together the attached IPM Short on the topic of contaminated organic insecticide products with the active ingredient azadirachtin, some of which are subject to a national voluntary recall. Please share this information with growers, PCAs, distributors, Master Gardeners, or others who may use or have an interest in these products. Please share with you Master Gardeners also.
Click on the pdf below for more information.
corn earworms counts for August 16
Corn Treasure Valley
corn earworm
Posted on: August 16, 2017 by Jerry Neufeld
Below are the corn earworm counts by location taken this morning, August 16. The counts are the highest they have been this year, but remember, University of Idaho CIS 366 entitled "Timing Corn Earworm Control" states that corn earworm moths lay eggs in freshly silking corn.
Weekly Corn Earwom Counts, 2017
Location 7/25, 8/1, 16-Aug
Melba 51, 3, 1
South Nampa 3, 17, 26
South Caldwell 12, 15, 51
Huston 15, 6, 7
Homedale 10, 22, 38
Wilder 41, 23, 29
Middleton 5, 12, 27
totals 137, 98, 179
Potato psyllid monitoring update, 11 August 2017
Potato All Locations
potato psyllids
Posted on: August 11, 2017 by Erik Wenninger
Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (9 fields), Elmore (1 field), Twin Falls (2 fields), Jerome (1 field), Minidoka (1field), and Power (1 field).
This week, we collected 26 psyllids from sticky cards (22 from Light sites and 4 from Intense sites).
We had traps deployed in 91 of the 95 fields that are being monitored this year and found psyllids in 15 of these 91 fields (16.5%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
This continues to be a relatively “quiet” year for potato psyllids. For perspective, during August last year we were collecting hundreds of psyllids per week with similar sampling effort.
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.
Malheur Experiment Station Onion Variety Day August 22
All Crops All Locations
Posted on: August 9, 2017 by Janet Jones
Malheur Experiment Station Onion Variety Day August 22
You are invited to the Malheur Experiment Station Onion Variety Day!
Place: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
in the field off Onion Avenue under the canopy.
Date: Tuesday, August 22, 2017
Registration starts at 9:00am with donuts and refreshments.
A complimentary lunch will be served at noon.
Click on the PDF below for the Flyer.
Please RSVP for lunch or if you need more information call Jan Jones at (541) 889-2174 or email janet.jones@oregonstate.edu.
First Lso-positive psyllid collected in Treasure Valley this year
Potato All Locations
Potato Psyllid
Posted on: August 4, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (5 fields), Gem (1 field), Elmore (1 field), Twin Falls (4 fields), Jerome (2 fields), Minidoka (2 fields), Cassia (4 fields), and Bannock (1 field).
This week, we collected 35 psyllids from sticky cards (23 from Light sites and 12 from Intense sites).
We had traps deployed in 92 of the 95 fields that are being monitored this year and found psyllids in 20 of these 92 fields (21.7%).
One psyllid collected last week in Canyon County tested positive for Lso (liberibacter), the bacterium that causes zebra chip. This is our first hot psyllid in the Treasure Valley this year and our fifth hot psyllid collected this year on sticky traps in commercial potato fields. Thus far this year, 2.3% of the psyllids we have collected on sticky traps have tested positive for Lso. This percentage is higher than last year, though the total number of psyllids collected this year has been far lower than last.
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.
Curly Top confirmed in Peppers and Beets!
Landscape and Garden Treasure Valley
Posted on: August 4, 2017 by Dian Roberson
We have confirmed cases of Beet Curly Top Virus in both peppers and sugar beets. It also infects a wide range of crops such as tomatoes, beans, beets, cucurbits, spinach, and squash. The virus is spread by the beet leafhopper, Circulifer tenellus. Read the articles below for identification and control information!
» https://pnwhandbooks.org/plantdisease/host-disease/tomato-lycopersicon-esculentum-curly-top
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-beet-leafhopper
corn earworms counts for August 1
Corn Treasure Valley
corn earworm
Posted on: August 1, 2017 by Jerry Neufeld
Corn earworm traps with pheromone lures were set out at 7 locations two weeks ago. Below are the moth counts taken from these traps as of August 1. Moth counts are higher this year than they have been for several years.
Location 7/25, 8/1
Melba 51, 3
South Nampa 3, 17
South Caldwell 12, 15
Huston 15, 6
Homedale 10, 22
Wilder 41, 23
Middleton 5, 12
Totals 137, 98
Psyllid monitoring update, 28 July 2017
Potato All Locations
Potato Psyllid
Posted on: July 28, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (5 fields), Gem (1 field), Elmore (1 field), Twin Falls (5 fields), Gooding (1 field), Jerome (1 field), Cassia (2 fields), Power (1 field), and Bannock (1 field).
This week, we collected 24 psyllids from sticky cards (19 from Light sites and 5 from Intense sites).
We had traps deployed in 94 of the 95 fields that are being monitored this year and found psyllids in 24 of these 94 fields (25.5%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
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 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
