Crop Alerts
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potato psyllid and ZC update
Potato All Locations
potato psyllids and ZC
Posted on: August 23, 2013 by Erik Wenninger
Today, August 23, at least one plant was observed at the Kimberly Research and Extension Center displaying classic zebra chip foliar and tuber symptoms. Samples are currently being tested for the presence of the Lso bacterium that causes zebra chip. Refer to http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/ for additional information on potato psyllids scouting efforts and zebra chip symptom identification.
Potato psyllid numbers on sticky traps continue to rise across the U-Idaho monitoring program. A few traps remain to be read from this week’s sampling; however, thus far there have been no psyllids found in counties from which we had not previously found psyllids. We are still waiting on Lso test results from last week. Detailed monitoring results and management recommendations can always be found here:
http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
various sugarbeet pests
Sugarbeets All Locations
several insect and disease pests
Posted on: August 20, 2013 by Jerry Neufeld
The Amalgamated Sugar Company Field Consultants are reporting that black bean aphids are widespread in sugarbeet fields in the Eden and Hazleton, Idaho area. The infestation is moderate to very high, depending on the location. They appear to be moving from the east end of the Twin Falls district to the west. In addition, two spotted spider mites are widespread throughout the Treasure Valley and the Twin Falls sugarbeet growing areas.
Cercospera Leaf Spot has also been found in sugarbeet fields in the Wendell area. This disease does not show up very often and is very localized. Powdery mildew has also been found in the Twin Falls area.
Make sure to scout your fields to assess the level of infestation you may, or may not have with these pests. TASCO stresses you should contact your TASCO Field Consultant for treatment recommendations, or if you have any questions.
various sugarbeet pests
All Crops All Locations
several insect and disease pests
Posted on: August 20, 2013 by Jerry Neufeld
The Amalgamated Sugar Company Field Consultants are reporting that black bean aphids are widespread in sugarbeet fields in the Eden and Hazleton, Idaho area. The infestation is moderate to very high, depending on the location. They appear to be moving from the east end of the Twin Falls district to the west.
In addition, two spotted spider mites are widespread throughout the Treasure Valley and the Twin Falls sugarbeet growing areas. TASCO is recommending Lannate and Lorsban as the chemicals of choice to treat these insects. The pre-harvest interval may be an issue to deal with, depending on when you make the treatment. Make sure to read and follow the label instructions.
Cercospera Leaf Spot has also been found in sugarbeet fields in the Wendell area. This disease does not show up very often and is very localized. TASCO is recommending lengthening the interval between irrigations and either Headline or Inspire XT for the fungicide treatment. Powdery mildew has also been found in the Twin Falls area.
Make sure to scout your fields to assess the level of infestation you may, or may not have with these pests. TASCO stresses you should contact your TASCO Field Consultant if you have any questions.
Composting Field Day September 10
Tree Fruits All Locations
Posted on: August 19, 2013 by Tony McCammon
This is a FREE workshop! Join us at Rocky Fence Vineyard at 3770 Fuller Rd., Emmett, ID 83617 for a field day demonstrating three different composting techniques applicable to producers of different sizes, how adding carbon sources affect dairy compost quality, how to reduce air emissions from grape, wine, and dairy production, and how to implement composting on your farm.
Topics to be covered during the field day
•Overview of mechanically turned, forced aerated, and passive aerated windrows composting systems.
•Challenges for handling vine prunings and other carbon rich materials and nitrogen rich manures.
•What to do if the compost process doesn’t work as intended. Can I still use it?
•Preliminary results from a University of Idaho Extension year-long study on composting grape vine prunings and dairy manure.
•Field day features work supported by an Idaho Natural Resources Conservation Service, U.S. Department of Agriculture, CIG grant
Parma Idaho Fruit Field Day 2013
Tree Fruits All Locations
Posted on: August 19, 2013 by Tony McCammon
The University of Idaho Annual Fruit Field Day will be held on Friday September 6, 2013 8:30 am to 1:00 pm at the U of I Parma Research and Extension Center Pomology Orchard and Vineyard site, about 4 miles north of Parma, Idaho. The registration will start at 8:30 am and program will start at 9:00 am (sharp). Several cultivars of new table grapes, peaches, nectarines, apples, plums, quince, Asian pears, and other alternative fruits will be presented during the tour. Participants can taste many of these fruits. Highlights
Potato Progress
Announcements All Locations
Posted on: August 19, 2013 by Jerry Neufeld
Attached please find Volume XIII, Number 8.
In view of the recent finds of late blight in the Columbia Basin, Dennis Johnson (Professor of Plant Pathology at WSU) has offered the enclosed article on late blight management. This article is up-to-date and broadly applicable to irrigated potato production. You will also find in this issue some important announcements.
Andy Jensen, Ph.D.
Regional Research Director
For: Potato Commissions of Idaho, Oregon, & Washington
4032 N Ballantyne Ln.
Eagle, ID 83616
Home Office: 208-939-9965
Cell: 509-760-4859
Web: www.nwpotatoresearch.com
potato psyllid and zc update
Potato All Locations
potato psyllids and ZC
Posted on: August 16, 2013 by Erik Wenninger
Potato psyllids were trapped for the first time in eastern Idaho this week, one each in Power and Bingham counties. Psyllids were also trapped for the first time in Minidoka county. Incidence still remains low (less than 2%), as only six psyllids have tested positive for Lso out of the 300 trapped in our monitoring network throughout southern Idaho. To date, psyllids have now been trapped in Owyhee, Canyon, Ada, Elmore, Gooding, Jerome, Twin Falls, Cassia, Minidoka, Power, and Bingham counties. All psyllids collected last week tested negative for Lso, the bacterium that causes zebra chip disease.
Detailed monitoring results and management recommendations can always be found at the link provided below:
http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
Click on the link(s) below for more information about this pest:
» http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
potato psyllid and zc update
Potato All Locations
potato psyllids and ZC
Posted on: August 9, 2013 by Erik Wenninger
More potato psyllids were trapped this week in potato fields in Owyhee, Canyon, Ada, Elmore, Gooding, Jerome, Twin Falls, and Cassia Counties. Over 200 psyllids have been collected in our monitoring network so far this summer, and only six have tested positive for Lso, the bacterium that causes zebra chip disease. Those six Lso positive psyllids were trapped in Canyon, Jerome, and Twin Falls counties. This is relatively low incidence (less than 3%) compared to last year. All psyllids trapped last week tested negative for Lso.
Detailed monitoring results and management recommendations can always be found at the link provided below:
http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
» http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
Pesticide Disposal Program
Announcements All Locations
Posted on: August 7, 2013 by Jerry Neufeld
Click on the pdf below for information about the Idaho State Department of Agriculture’s Pesticide Disposal Program at various locations across Idaho starting in September.
potato psyllid and zc update
Potato All Locations
potato psyllids and ZC
Posted on: August 2, 2013 by Erik Wenninger
More potato psyllids were trapped this week in potato fields in Canyon, Ada, Elmore, Gooding, Jerome, Twin Falls and Cassia Counties. Results from last week show three more positives for Lso, the bacterium that causes zebra chip, but incidence of Lso remains low (less than 5%).
Detailed monitoring results and management recommendations can always be found at the link provided below:
http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
Click on the link(s) below for more information about this pest:
» http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
2013 Miller Research Pest Management Field Day
Potato All Locations
Posted on: August 2, 2013 by Jeff Miller
Miller Research will be holding a pest management field day on Wednesday, August 14 at the Miller Research facility located near Acequia, ID (426 E 200 N). A short presentation will be given in the office followed by a tour of the research plots.
The presentations will focus on cultural and chemical management of diseases. We will discuss strengths and weaknesses of different management approaches. We have been awarded 2 ISDA pesticide recertification credits and 2.5 CCA (Pest Management) credits for this meeting.
Lunch will be served. Please RSVP so that we can plan for the appropriate number of people. Additional information along with a detailed agenda can be found at the link below. There is no cost to attend.
» http://www.millerresearch.com/alerts/research-news/item/43-mr-pest-management-field-day
Food Safety Modernization Act (FSMA) Meeting
All Crops Treasure Valley
Posted on: August 1, 2013 by Stuart Reitz
There will be a meeting with FDA scientists and administrators and state officials on August 12, 2:30 - 4:30 PM at the Four Rivers Cultural Center, 676 SW 5th Ave, Ontario, OR.
This meeting will be to discuss agricultural water in the Treasure Valley in relation to the proposed FSMA produce Rules. FDA officials will discuss the process for applying for possible exemptions / variances to the rule standards.
Growers and shippers are encouraged to attend.
Please see the attached flyer for details on reserving a seat for the meeting.
***There is no Registration Fee for this event***
Please call Malheur County Extension (541-881-1417) for information.
potato psyllid and ZC update
Potato All Locations
potato psyllids and ZC
Posted on: July 26, 2013 by Erik Wenninger
More potato psyllids were trapped this week in potato fields in Canyon, Ada, Elmore, Gooding, Jerome, and Twin Falls Counties. In addition, we trapped our first potato psyllids this week in Owyhee and Minidoka Counties. In addition to the counties listed above, in a previous week we had also captured a psyllid in Cassia County. All the psyllids tested from last week were negative for Lso, the bacterium that causes zebra chip. So far, over 100 potato psyllids have been collected this year in U-Idaho monitoring programs; of the 64 psyllids tested so far, only 3 have been positive for Lso (less than 5% incidence). In contrast, by this time last year roughly 50% of the psyllids collected were positive for Lso. It is important to note, however, that despite finding only a handful of Lso+ psyllids in the Columbian basin last year, zebra chip was still found.
Detailed monitoring results and management recommendations can always be found at the link provided below:
http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
» http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
Bellevue Organic Farm Offers Tour
Announcements All Locations
Bellevue Organic Farm Offers Tour
Posted on: July 23, 2013 by Nora Olsen
Bellevue Organic Farm Offers Tour
Bellevue – Wood River Organics will host a field day and tour for produce growers and others interested in learning more about the process of organic farming.
Judd McMahan of Wood River Organics grows a variety of salad greens, as well as carrots, beets, tomatoes and cucumbers.
On July 31, McMahan will provide a tour of his greens and vegetable production, organic pest and weed management, cover cropping, specialized equipment for greens production, and his wash station and pack shed.
The tour is co-hosted by the Northwest Center for Alternatives to Pesticides and is being offered as a follow-up to the winter workshop Direct Marketing & Wholesale Success: Post-harvest Handling & Food Safety for Fresh Produce Growers. Attening farms will receive a complimentary 312-page color manual, Wholesale Success: A Farmers Guide to Food Safety, Postharvest Handling, Packing and Selling Produce, produced by FamilyFarmed.org, which is valued at $70 (while supplies last).
The tour is $15 and includes lunch. Check-in is at 9 a.m.
Register by July 26 online at www.pesticide.org or with Jen Miller, jmiller@pesticide.org or 208-850-6504. There is a $5 additional fee for late registration. The farm is located at 26 Townsend Gulch Rd in Bellevue. A map and driving directions are available at www.pesticide.org.
corn earworm
Corn Treasure Valley
corn earworm
Posted on: July 23, 2013 by Jerry Neufeld
The University of Idaho CIS 366 entitled “Timing Corn Earworm Control,”states that summer corn earworm moths will begin laying eggs in fresh corn silk at approximately 1300 growing degree days (GDD). Egg hatch and larvae attack will begin about 73 GDD later.
According to the Oregon State University GDD model for Corn Earworm (http://uspest.org/cgi-bin/ddmodel.us ), we are currently at 1301 GDD in the Caldwell area, 1264 GDD in the Nampa area, and 1140 GDD in the Parma area. We will hit approximately 1373 GDD in the Caldwell and Nampa areas on 7/26, 1373 GDD in the Parma area on approximately 7/31. Those fields with fresh silk at 1373 GDD are most vulnerable to attack from corn earworm larvae.
Stemphylium blight in Lentils
All Crops All Locations
Stemphylium blight of lentil
Posted on: July 22, 2013 by Ronda Hirnyck / Todd Scholz, USA Pea and Lentil Council
The Pulse Pipeline posted a Disease Alert about Stemphylium blight of lentil last week. It was based on observations of July 8.
On July 16, Stemphylium was observed in a lentil field planted to 'Morena' south of Garfield, WA. 'Morena' is considered highly susceptible to Stemphylium by researchers from MT and ND.
Many leaflets under the lush canopy were blighted already, and turned black (please see the attached photo) indicating production of spores which can easily spread the disease. The Stemphylium blight will defoliate the leaves.
USDA-ARS in Pullman, WA is recommending an application with Headline fungicide (6 to 9 fl oz/A) if growers of 'Morena' see the blighted leaflets under the canopy. It is known that the spray will not get under the canopy, but it will protect the leaves on top of the canopy.
Only limited data are available on fungicide applications for Stemphylium control.
Gem SWCD Summer Tour
Announcements Treasure Valley
Posted on: July 22, 2013 by Jerry Neufeld
Attached is a flyer announcing the Gem County Soil and Water Conservation District Summer Tour on August 13, 2013. Click on the pdf below for more details.
potato psyllid and ZC update
Potato All Locations
potato psyllids and ZC
Posted on: July 19, 2013 by Erik Wenninger
More potato psyllids were trapped this week in potato fields in Ada, Canyon, Elmore, and Twin Falls counties. The number of psyllids collected per trap and per field remains relatively low; however, they are in line with trap counts from this time last year. It remains to be seen whether a similar increase will be observed this year, but last year’s sticky trap captures increased dramatically through August and September.
We are still waiting on results from Lso testing from psyllids collected during this and last week. Detailed monitoring results and management recommendations can always be found at the link provided below:
http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
» http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
Lso-positive potato psyllids found in Canyon and Twin Falls
Potato All Locations
potato psyllids and ZC
Posted on: July 16, 2013 by Erik Wenninger
For the first time this year we have found potato psyllids in Idaho that have tested positive for Lso, the bacterium that causes zebra chip. A total of three individual psyllids tested positive from early July: one in each of two fields in Canyon County and one collected at the Kimberly R&E Center.
Detailed monitoring results and management recommendations can always be found at the link provided below:
» http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
U-Idaho potato psyllid and ZC update
Potato All Locations
potato psyllids and ZC
Posted on: July 12, 2013 by Erik Wenninger
Potato psyllids were trapped this week on sticky cards in Canyon, Ada, Elmore, Twin Falls, and Cassia Counties. This was our first potato psyllid captured this year in Cassia County. So far no psyllids tested to date have been positive for the bacterium that causes ZC. We are still waiting on results from psyllids collected during this and last week. For detailed monitoring results and management recommendations, you can always use the link provided below:
http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
» http://extension.uidaho.edu/kimberly/2013/04/2013-psyllid-updates/
corn earworm
Corn Treasure Valley
corn earworm
Posted on: July 12, 2013 by Jerry Neufeld
The University of Idaho CIS 366 entitled “Timing Corn Earworm Control,”states that summer corn earworm moths will begin laying eggs in fresh corn silk at approximately 1300 growing degree days (GDD). Egg hatch and larvae attack will begin about 73 GDD later. Click on the pdf below to view CIS 366.
According to the Oregon State University GDD model for Corn Earworm (http://uspest.org/cgi-bin/ddmodel.us ), we are currently at 1057 GDD in the Caldwell area, 1008 GDD in the Nampa area, and 1134 GDD in the Parma area. We will hit 1300 GDD in the Caldwell area on approximately 7/21, 1300 GDD in the Nampa area on approximately 7/24, and 1300 GDD in the Parma area on approximately 7/18. At each location, we will hit 1373 GDD about 3 to 4 days after reaching 1300 GDD. Those fields with fresh silk at 1373 GDD are most vulnerable to attack from corn earworm larvae. The links below contain management information from the Pacific Northwest Insect Management Handbook.
» http://pnwhandbooks.org/insect/vegetable-seed/corn/corn-seed-corn-earworm-sweet-corn-only
» http://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-and-pests/corn-sweet-corn-earworm
potato tuberworm moths
Potato All Locations
potato tuberworm moths
Posted on: July 12, 2013 by Erik Wenninger
Potato tuberworm moths have been captured in pheromone traps in Malheur Co (Stuart Reitz, Malheur Co. Cooperative Extension). Feeding by tuberworm larvae may cause extensive damage to tubers in the field and in storage. Thus far, we are unaware of current tuberworm infestations in Idaho; however, Mike Cooper, ISDA, in cooperation with Bill Buhrig, Jim Barbour, and Erik Wenninger, University of Idaho, will be deploying some pheromone traps in Idaho to monitor for moths. We encourage growers and crop consultants, especially those in western Idaho, to be aware of this pest. For more information on tuberworm moths, consult the following references:
http://www.agri.idaho.gov/Categories/PlantsInsects/RegulatedAndInvasiveInsects/Insectsformreports.php
http://www.cals.uidaho.edu/edComm/pdf/cis/cis1125.pdf
http://extension.oregonstate.edu/catalog/pdf/pnw/pnw594.pdf
bean aphids in sugar beet
Sugarbeets All Locations
bean aphids
Posted on: July 11, 2013 by Erik Wenninger
Black bean aphids have been observed in sugar beet fields at the U-Idaho Kimberly R & E Center. The bean aphid is a dark-bodied aphid, about 1/16-inch long; individuals may be winged or wingless. Aphids are most abundant on the young leaves within the crown of sugar beets. Infestations usually occur as scattered hot spots or along edges rather than uniformly across the entire field.
Aphids are attacked by a variety of predatory and parasitic insects, including lady beetles. If natural enemies are absent, consider an insecticide application if bean aphid colonies cover 20 to 40 percent of leaf surfaces.
For current information on registered insecticides, consult the Pacific Northwest Insect Management Handbook (http://pnwhandbooks.org/insect/agronomic/sugar-beet).
Iris Yellow Spot in Malheur County
Onion Treasure Valley
Iris yellow spot virus
Posted on: July 9, 2013 by Stuart Reitz
Iris yellow spot virus has been confirmed in onion fields in the Nyssa and Ontario, Oregon areas.
Reducing plant stress will help to reduce the severity of the disease. Try to minimize stress by making sure fields are maintained at an adequate fertility level, and that the soil moisture is kept at about the 20 centibar level.
Maintain good thrips management with insecticide applications to help to reduce further spread of the virus.
Correction to date of Caribou Field day - THURSDAY, the 18th
Small Grains Eastern Idaho
Variety Trials
Posted on: July 9, 2013 by Juliet Marshall
Please join the Caribou County Grain Growers and University of Idaho for a Grain Field Day and Dinner.
3:00 PM
July 18, 2013 - Thursday, starting at the Spring Trials
(Spring Trial Directions: From stop light at Chevron station go north on Government Dam Road to stop sign about 2 miles north. Turn left and go about 1 1/2 miles north of Hooper Springs to crossroad of truck crossing. Turn left and go 1/4 mile to driveway of Sid Cellans house and turn in driveway. Spring Plots are in field in front of Sids house.
Winter Trials (Winter trials are further north on Government Dam Road 4 or 5 miles to 10 mile pass road. Turn left on 10 mile pass road and go about 2 miles west. Look for plots on north side of road or the left. They are marked with flags.)
