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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.
First Lso-positive potato psyllid found in Idaho this season
Potato All Locations
potato psyllids
Posted on: June 1, 2017 by Erik Wenninger
One psyllid collected last week from a yellow sticky card deployed at the Kimberly Research & Extension Center tested positive for Lso (liberibacter), the bacterium associated with zebra chip disease. No psyllids collected from commercial fields tested positive.
On Friday we will post details on our monitoring results from this week.
We continue to urge growers and crop consultants to implement IPM programs for zebra chip.
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.
May 26, 2017 First potato psyllids found in Idaho potato fields this season
Potato All Locations
Potato Psyllid
Posted on: May 26, 2017 by Lucy Standley
We retrieved our first set of sticky traps from potato fields this season and found on these cards our first potato psyllids for the 2017 potato season.
Potato psyllids were collected on sticky traps in potato in the following counties: Twin Falls (1 field), Minidoka (2 fields).
This week, we collected 3 psyllids from sticky cards (2 from Light sites and 1 from Intense sites).
We had traps deployed in 17 of the estimated 73 fields (23%) that will be monitored this year and found psyllids in 3 of the monitored fields (17.6%).
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.
Lygus Bug emergence in Alfalfa Seed
All Crops All Locations
Lygus bug
Posted on: May 25, 2017 by Jerry Neufeld
The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition shows that, depending on your location in the Treasure Valley, we have accumulated 257 degree days between January 1, 2017 and May 23, 2017. This is 18 days behind compared to this date in 2016 and 12 days behind the 30-year average. 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 that is predicted to occur about May 26.
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 or just as 4th instar nymphs are detected. We will plan to put out another alert as we approach 272 degree days in Parma. You can follow the degree accumulation yourself by using the web link at the bottom of this announcement. If all works correctly the location will be set to Parma and the correct model already will be listed. You can adjust the location and other information using the instructions below:
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 “Select model” link to the right of the Model box. It should be model 61 in the list.
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”
Thanks for Dr. JIm Barbour for providing this information.
U of Idaho Parma Field Day
Announcements Treasure Valley
Posted on: May 25, 2017 by Jerry Neufeld
The University of Idaho will be hosting a Field Day at the Parma R and E Center on June 21, 2017. Lunch and refreshments will be provided. Please RSVP by calling 722-6701 or emailing laphillips@uidaho.edu to let them know you plan to attend. For additional information click on the pdf below.
Potato Sustainability Audit Manual
All Crops All Locations
None
Posted on: May 24, 2017 by Nora Olsen
Manual and resources now available to help navigate the Potato Sustainability Initiative (PSI) survey and audit
Announcements recently went out on whether you will be audited in person for your 2016 responses to the Potato Sustainability Initiative (PSI) survey. Most process growers are requested to participate in the PSI sustainability survey and approximately 20% of the growers who completed the survey will be audited each year. The audit involves an interview between the grower and auditor with specific questions and an inspection of documents. A manual has been developed to help growers to methodically and successfully gather required documents for the audit, with examples of standard operating procedures, and resources to help answer interview questions. The manual is posted at www.uidaho.edu/cals/potatoes. Changes to this manual will be done periodically to adjust for changes to the PSI survey. The manual was developed by IACI, University of Idaho, and Washington State University with funding from the NW Potato Research Consortium.
Turf Buster Plant Sale
Announcements All Locations
Posted on: May 19, 2017 by Rich Guggenheim
The Canyon County Master Gardeners has plants for sale for your garden. Many 4 inch pots and 4 packs with tomatoes, peppers, onions, and more are only $1 beginning Monday. Seedling trees in 1 gal pots are $2.50 each. Stop by the office for more information or to purchase. Sale runs through Friday or until we run out of plants.
2017 Potato psyllid monitoring program underway in Idaho
Potato All Locations
potato psyllids
Posted on: May 18, 2017 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 occurred this week in 12 Treasure Valley sites and 21 Magic Valley sites. Next week we expect to initiate sampling in 15 and 20 additional fields in the Treasure and Magic valleys, respectively.
More details on the program will be forthcoming as we continue to ramp up sampling efforts. 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/cals/potatoes/news/psyllid-management
» http://www.uidaho.edu/cals/potatoes/news/psyllid-management
sugarbeet root maggot 2017
All Crops All Locations
https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-sugar-beet-root-maggot
Posted on: May 16, 2017 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
Lygus Bug in Alfalfa Seed, 2017
All Crops All Locations
Lygus Bug
Posted on: May 16, 2017 by Jerry Neufeld
The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition shows that, depending on your location in the Treasure Valley, we have accumulated 201 degree days between January 1, 2017 and May 15, 2017. This is 17 days behind compared to this date in 2016 and 10 days ahead of the 30-year average. 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 that is predicted to occur about May 25.
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. We will plan to put out another alert as we approach 272 degree days in Parma.
Below are the instructions for using the degree day calculator.
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 “Select model” link to the right of the Model box. It should be model 61 in the list.
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”
Native Wildflower Seed Production Field Day
Announcements Treasure Valley
Posted on: May 11, 2017 by Bill Buhrig
The Annual Malheur Experiment Station Native Wildflower Seed Production Field Day is only one week away!
You are welcome to attend on Thursday, May 18, 2017 at the Experiment Station located at 595 Onion Ave just a few miles out of Ontario.
Registration begins at 8:30 AM, Event begins at 9:00 AM and complimentary lunch will be served. Please reserve lunch by calling Janet Jones at (541) 889-2174 or by emailing her at janet.jones@oregonstate.edu.
Check out the link for more info!
Western Cherry Fruit Fly (WCFF) Anouncement
Cherry Treasure Valley
Western Cherry Fruit Fly
Posted on: May 8, 2017 by Dian Roberson
This week the Idaho State Department of Agriculture set out traps for its annual Western Cherry Fruit Fly (WCFF) survey in Canyon and Gem counties. They will be monitoring the traps for first capture of WCFF as an indication that the flies are emerging in those locations and that treatment should begin.
Online phenology and degree-day modeling for WCFF predicts first flight on May 25 in Ontario/Parma, May 26 in Nampa, May 27 in Caldwell/Emmett and
May28 in Boise.
For more information contact Paul Castrovillo at paul.castrovillo@isda.idaho.gov or call 208-332-8627
Master Gardener Scholarship Fundraiser
Announcements Treasure Valley - Idaho
Posted on: May 8, 2017 by Rich Guggenheim
The Master Gardeners in Canyon County are having a fundraiser to help raise money for scholarships. They are selling plants at the Extension Office Monday-Friday from 8-5 and also at Nampa Farmers Market on Saturday from 9-1 and the Caldwell Farmers Market on Wednesday from 3-7 during the month of May.
Prices are 4 Inch pots and 4 packs are $3 each or 2 for $5. We have many tomatoes, peppers, zinnia's, eggplant, okra, marigold, and other stuff for sale too in these sizes. Mix and match.
We have one gallon pots of seedling trees (Austrian Pine, Scots Pine, Blue Spruce, Rocky Mountain Juniper, Catalpa, Poplar, and Honey Locust) for $5 each.
Call 459-6003 or stop by the office at 501 Main St. in Caldwell.
Fire Blight (Erwinia sp.)
All Crops All Locations
Posted on: May 8, 2017 by Dian Roberson
Conditions have been in the extreme category over the last week for fire blight. This bacterial infection can attack anything in the rose family (Rosaceae). It is especially destructive to apples (Malus spp.), pears (Pyrus spp.), and crabapples (Malus spp.). 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.
» https://pnwhandbooks.org/plantdisease/host-disease/apple-malus-spp-fire-blight
Codling Moth (Cydia pomonella)
Apple All Locations
Lepidoptera: Tortricidae
Posted on: May 3, 2017 by Rich Guggenheim
Codling moth has been trapped in Sunny slope orchards.
To successfully control codling moth in fruit trees, larvae must
be prevented from entering fruit. Controls must be applied
at a specific time. Once the eggs hatch and larvae enter the fruit, control
measures are ineffective.
Management includes a rigorous and routine schedule of spray insecticides, both organic and traditional, every 10 to 14 days depending on label instructions.
» http://jenny.tfrec.wsu.edu/opm/displayspecies.php?pn=5
» http://ipm.ucanr.edu/PMG/r4300111.html
» http://ipm.ucanr.edu/PMG/PESTNOTES/pn7412.html
» http://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1664&context=extension_curall
Spring 2017 edition of Dig In Newsletter
Announcements All Locations
Posted on: May 2, 2017 by Rich Guggenheim
The Spring 2017 edition of the Dig In Newsletter is now available. To pick up a print copy, stop by the University of Idaho Extension Office at 501 Main St. in Caldwell.
ISDA Pesticide Disposal Program, 2017
Announcements Treasure Valley - Idaho
Posted on: April 27, 2017 by Jerry Neufeld
ISDA will be hosting unusable pesticide collections in southwest and north Idaho in May 2017. Click on the pdf below for more information.
Yes, It is Robigalia, April 25th. The rust god is not appeased
Small Grains All Locations
Stripe rust in wheat
Posted on: April 26, 2017 by Juliet Marshall
BYD is being found on winter wheat and winter barley planted early in the fall 2016, and was worse in field planted without insecticidal seed treatments.
Stripe rust is starting in Idaho and the weather is very conducive to spread. Reports so far came Friday from Parma (on volunteer), yesterday from Twin Falls county on Everest hard red winter, and today - Power County on SY Ovation.
Parma (western Idaho) SR was found on lower and middle leaves. In Twin Falls county and Power county, SR was on middle to younger leaves. Crop is early jointing to late tillering.
The following is the report on stripe rust sent to my cereal pathology pest alert email group:
Did the the subject line catch your attention? Good.
Today is April 25th.
Robigalia!
from Anne Delgehausen, St. Paul, MN:
Screen Shot 2016-04-25 at 7.48.18 AM.png (SEE picture)
https://en.wikipedia.org/wiki/Robigalia An ancient Roman festival held to appease the God of rust (Robigus or Robigo). The Roman’s celebrated Robigalia, an annual festival that, through sacrifices and feasting, and hoped to prevent rust from destroying the upcoming crop.
May the evidence of your victory over the
Puccinia
be abundant in your fields!
AS I did last year on this date, I am sending this reminder of the devastating diseases caused by the rust fungi (Puccinia) - specifically in this case, as usual, stripe rust, also called yellow rust
While we no longer sacrifice red dogs (or sheep or goats) to stop stem rust, we battle another Puccinia (Puccinia striiformis), stripe rust almost every year now. While I am not suggesting you switch to sacrificing YELLOW dogs, however, I am suggesting that you remain vigilant in your battles against the yield-robbing fungi that affect so many wheat varieties.
So Yes, this email is a reminder that stripe rust is continuing to spread in irrigated and dryland crops.
This weather is very conducive to the spread of stripe rust. With susceptible varieties of winter wheat, it is highly recommended that you add fungicides in with the herbicides. But there are legitimate concerns about phytotoxicity associated with tank mixing.
Some general recommendations:
1) Application of tank mixes of herbicides and fungicides may result in phytotoxicity when cold (frosty) temperatures follow application. The same applies, more for spring wheat, when hot temperatures follow applications.
2) High pressure applications (40 psi) may result in increased phytotoxicity over lower pressure applications (30 psi).
3) No additional surfactant should be used when wild oat herbicides (Axial XL, Axial Star, Discover) are mixed with fungicides.
4) Bromoxynil herbicides (such as Bronate Advanced, Starane NXT, Maestro Advanced) should not be mixed with strobilurin fungicides.
5) READ and follow all label directions.
Last year I called some of our reps from various companies, who offered the following information:
From Kelly Luff of Bayer Crop Science:
Stratego (4-5 oz rate) can be tank mixed with herbicides, but leave out NIS. (Absolute is not recommended in this market due to potential phytotoxicity. Stratego YLD is not recommended.)
Do not spray prior to high risk of frost or freezing temperatures. Optimum performance comes when applications are made when frost isn’t occurring for a few days after application. Herbicides mixed with MSO increases burn especially with frost after application.
From Allan Landon of Syngenta:
Quilt, Headline and Twinline can be mixed with herbicides, but do not add surfactants with the mix. Wild oat herbicides (Axial XL, Axial Star or Discover) are higher in risk for phytotoxicity when mixed with these fungicides. (On the label: Twinline demonstrates phytotoxicity when mixed with EC formulated herbicides or insecticides and/or fertilizers.)
Actively growing, non-stressed crops fare better than stressed crops. Yellowing may occur, but crop should grow out of the symptoms.
From Joe Yennish of Dow:
Avoid mixing strobilurin fungicides with bromoxynil herbicides. PropiMax fungicide is a propiconizole and can be tank mixed with herbicides.
For Winter Wheat:
Stripe rust has been found where Brundage soft white winter wheat is grown. Reports so far came Friday from Parma (on volunteer), yesterday from Twin Falls county on Everest hard red winter, and today - Power County on SY Ovation.
For Spring wheat:
Choose resistant spring wheat varieties. Susceptible varieties should be protected with fungicides, including at herbicide timing.
Scout wheat for stripe rust, even resistant varieties. Changes in stripe rust races will mean that resistance may no longer be effective. PLEASE send reports and photos to me so we can keep track!
Cheers! I’ll be drinking red wine tonight, not white (yellow). Here’s to controlling rust!
Juliet
Diseases in Cereals - Stripe Rust confirmed in western Idaho
All Crops All Locations
Stripe rust in wheat
Posted on: April 24, 2017 by Juliet Marshall
Stripe rust on volunteer wheat was found by an observant colleague in western Idaho near Parma. Lower leaves are seen with stripe rust indicating it is likely that it overwintered. I will be receiving the sample and checking to be sure that it is wheat. Please scout fields of susceptible varieties in all areas of southern Idaho. So far, we have not seen stripe rust in our variety trial plots in Brundage, known to be very susceptible to stripe rust. Our plots were not planted early, and could have possibly missed an early fall infection. The current weather is very conducive for spread and infection.
Please report stripe rust to your local Extension county educator, specialist or to Juliet Marshall so we can track the progress and warn producers to promote timely fungicide application.
Bur Buttercup
All Crops All Locations
Bur Buttercup
Posted on: April 20, 2017 by Rich Guggenheim
Chemical control of Bur Buttercup (Ceratocephala testiculata) can be effective when weeds are extremely young. Mowing and burning is an effective cultural control as is hand pulling. The weed is now beginning to reach flowering and has entered the reproductive state. Bur Buttercup is also toxic to livestock. Always follow label instructions. Rotating pesticide mode of action can reduce the occurrence of pesticide resistance.
» http://extension.usu.edu/rangeplants/htm/bur-buttercup
» http://oregonstate.edu/dept/coarc/sites/default/files/june_2013_article-_weeds.pdf
Malheur County Weed Advisory Board White-top Program
Announcements Northern Idaho
Posted on: April 20, 2017 by Bill Buhrig
The annual white-top and perennial pepperweed focus days are quickly approaching for Malheur County residents. Please check out the attached flier and link for more information. This is a good program and we thank County Weed Supervisor Gary Page and Co. for their hard work on this!
» http://extension.oregonstate.edu/malheur/sites/default/files/controlling_white_top.pdf
Apple Aphid
Landscape and Garden All Locations
Aphis Pomei
Posted on: April 17, 2017 by Rich Guggenheim
Nymphs of the Apple aphid, which overwinters as an egg has been detected on ornamental landscape varieties of apple and crabapple. Although they rarely cause economic loss to trees, control may be desired in the home landscape for cosmetic purposes.
The best timing for woolly apple aphid control is petal-fall with a systemic insecticide, or during the summer with an effective contact insecticide. Application of dormant oil plus an insecticide at delayed dormant stage (half-inch-green) may
provide season-long control of green and rosy apple aphids.
» http://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1663&context=extension_curall
