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powdery mildew in sugarbeets
Sugarbeets All Locations
Posted on: June 27, 2007 by Jerry Neufeld
The Amalgamated Sugar Company Field Representatives are saying that now is the time to plan your treatments for powdery mildew in sugarbeets. While mildew has not yet been found in the Treasure Valley, White Satin Field staff say the modes of action of the mildew chemistries work best if treatments are applied before mildew is found in the field. They are recommending mildew applications in the west end of the Treasure Valley by July 4, and applications in the east end of the Treasure Valley (Ada/Canyon County line) no later than July 10. Treatments should be made by these dates regardless of whether or not your fields are surface or sprinkler irrigated. THIS WEBSITE DOES NOT CONTAIN A REFERENCE PAGE FOR POWDERY MILDEW IN SUGARBEETS. CONTACT YOUR WHITE SATIN FIELD REPRESENTATIVE FOR INFORMATION REGARDING THEIR TREATMENT RECOMMENDATIONS AND ROTATION OF CHEMISTRIES.
stripe rust
Small Grains Treasure Valley - Idaho
Posted on: June 21, 2007 by Jerry Neufeld
Dr. Brad Brown is reporting some stripe rust on the UI Parma R and E station in some susceptible wheat varieties. Rust was found especially in a hard red winter wheat called Moreland. It would be appropriate to scout for stripe rust in late planted winter wheat and any spring wheat if you aren’t sure of the susceptibility of the varieties to stripe rust. Depending on the growth stage, it may or may not be too late to apply a fungicide.
Haanchen barley mealybug
Small Grains All Locations
Posted on: June 11, 2007 by Jerry Neufeld
Haanchen barley mealybug in north-central Idaho?
Mealybugs infesting spring barley, spring wheat and spring oats have been recovered from four commercial fields near Cottonwood, ID (Lewis and Idaho counties). Specimens additionally were recovered from two grassy weeds, wild oats and rat-tail fescue, at 2 of the 4 fields.
Tentative species identification as Trionymus haancheni, the Haanchen barley mealybug, is based solely on the fact that T. haancheni is the only mealybug known from cereals in Idaho. If expert examination confirms that these insects indeed are the Haanchen barley mealybug, these collections potentially constitute a significant change in host-plant range. Based on the best information currently available (i.e., research conducted by Juan M. Alvarez, University of Idaho), barley is considered the main host plant.
The first specimens were collected 22 May from a direct-seeded barley field that had been planted to winter wheat during 2006 and spring canola during 2005. Based on my 29 May site visit with Mr. Tom Gehring, Manager, Primeland Coop (Cottonwood), we estimated that approximately 5% of the field showed obvious damage in patches up to 50 X 50-feet where plants were stunted, yellowed, spotted or dead.
Mr. Gehring subsequently collected specimens at the other sites during the week of 4 June, and my subsequent visit today (8 June) again confirmed mealybug infestations in spring oats as well as on the weedy rat-tail fescue, Vulpia myuros. At all sites, bugs primarily were feeding on plant stems near the soil surface under field residue, though some also were collected from exposed leaves.
Barley growers in surrounding counties particularly might examine fields showing "wireworm spots" or similar patchy damage. Photos of the insect and pest biology are in University of Idaho Extension Publication CIS 1109, online at http://info.ag.uidaho.edu/pdf/CIS/CIS1109.pdf.
This information was provided by Dr. Ed Bechinski, Professor of Entomology,
Extension IPM & Pesticide Safety Education Coordinator at the University of Idaho.
Coddling Moth and Cherry Fruit Fly Update
Tree Fruits Treasure Valley - Idaho
Posted on: June 7, 2007 by Tony McCammon
As of
June 5th:
Coddling Moth DD
Biofix ACC.DD. 340dd 920dd(END Hatch)
Emmett 25-Apr 510.6 13-May 27-Jun
Fruitland 24-Apr 604.4 19-May 22-Jun
Parma 24-Apr 540.4 20-May 26-Jun
Snake River
Valley 25-Apr 610.0 20-May 21-Jun
Sunny Slope 25-Apr 540.5 20-May 25-Jun
Larval emergence for the first generation of codling moth is 69-79% completed for Southwest Idaho. Keep fruit protected from newly emerging codling moth larvae through the projected end of the 1st generation. Currently, the codling moth model predicts that egg hatch for the 1st generation will end between June 22 and June 26. A critical period for codling moth control is 340-640 DD after biofix (first adult activity). The percentage of egg hatch (larval emergence) for the first generation changes from 12 to 80% during this period. This relatively short 300 DD window of time (approx. 10-15 days in length) will see the greatest amount of codling moth pressure. It is important to have adequate residues of insecticide present on fruit during this period. There will be a 5-7 day “break” between the 1st and 2nd generation where fruit protection is not necessary.
Western Cherry Fruit Fly
Biofix AccDD
Emmett 25-May 228.7
Fruitland 27-May 283.3
Parma 28-May 171.9
Snake River
Valley 27-May 259.7
Sunny Slope 29-May 157.9
Based on numerous years of observation in Idaho, fruit is not susceptible to egg-laying from cherry fruit fly females until it changes from yellow to a salmon or blush color. When the earliest maturing fruit on the tree takes on a blush color, protect cherries with an insecticide application. Based on research, adult females are not ready to lay mature eggs until 7-10 days after first catch of the season. Use these two pieces of information for your location to initiate insecticide sprays to protect fruit from cherry fruit fly. Flies will develope according to temperatures like most insects. Spray timing can also be based on 190 Degree Days. Use the temperatures from the top of this page to time your applications.
Insecticides effective for WCFF:
- Spinosad GF-120 NF (apply with an electric pump sprayer mounted on a 4-wheeler; reapply every 7 days; excellent adulticide; not rainfast)
- Provado (moderate adulticide, excellent larvicide, can kill larvae within fruit; reapply every 14 days; watch for mite flare-up with repeated applications)
- Success and Entrust (reapply every 7 days)
- Dimethoate (Be careful follow instructions closely)
- Guthion (reapply every 14 days; 15 day PHI)
- Sevin (reapply every 7 days; watch for mite flare-up with repeated use)
- Diazinon (reapply every 7-10 days; 21 day PHI)
- Malathion (reapply every 3 days; watch for mite flare-up with repeated use)
Adult Colorado Potato Beetles
Potato Magic Valley
Posted on: June 7, 2007 by Jeff Miller
Adult Colorado potato beetles have been observed the past week. As Mike Thornton mentioned in an earlier alert, the adults do not cause too much damage. Look for eggs on the underside of potato leaves. When eggs begin to hatch a foliar insecticide application may be needed if a systemic insecticide was not used at planting.
Rhizoctonia canker
Potato Magic Valley
Posted on: June 6, 2007 by Jeff Miller
Rhizoctonia canker is developing on some potatoes. While there are no documented control measures that can be recommended at this stage of crop development, growers can look at underground stems to evaluate how severe Rhizoctonia stem canker may be for this season.
Rhizoctonia chemical control is obtained with seed-piece and and in-furrow treatments. It is not known if fungicide applications made at this time or later will have any effect on Rhizoctonia.
Alfalfa weevils and aphids
Alfalfa Magic Valley
Posted on: June 6, 2007 by Jeff Miller
Alfalfa weevils and aphids (species not identified) have been observed in alfalfa fields in the Rupert-Burley area.
Colorado Potato Beetle
Potato Treasure Valley - Idaho
Posted on: June 4, 2007 by Jerry Neufeld
Dr. Mike Thornton, from the UI Parma Research and Extension Center is reporting there are a lot of adult Colorado Potato Beetles in western Idaho potato fields right now. These first adults do not do much feeding damage, but growers should be watching for egg hatch if they want to time a foliar spray for the first generation of larvae.
2007 PNW Potato Insect Management Guidelines
Potato All Locations
Posted on: June 4, 2007 by Jerry Neufeld
The 2007 guidelines for managing insects in potatoes in the Pacific Northwest have been posted to the web. The document is authored by Alan Schreiber, Agriculture Development Group, Inc., Andrew Jensen, Washington State Potato Commission, Keith Pike, Washington State University and Gary Reed, Oregon State University. These guidelines are an update of the 2006 version. Changes include such things as: There are some products that are no longer registered on potatoes (such as Di-Syston and Guthion). There are several new products (such as Acramite and Beleaf) registered on potatoes. There are some changes in use patterns (such as Penncap M is no longer recommended for use on aphids, Assail is recommended for use on beet leafhopper). There are two significant additions to the guidelines. First, with the help of Juan Alvarez (U of Idaho), Idaho is included. Second, because of the surge in generic products, what is in what package is increasingly difficult to track. An attachment is included that lists every insecticide (398) registered for use on potatoes in Washington and Oregon. With the exception of a very small number of 24c registrations, this list should apply equally to Idaho. A list of 24c registrations in Idaho can be found at the following website: http://www.agri.state.id.us/Categories/Pesticides/registration/Section24cmain.php. The products are sorted by active ingredient, and include the product name, manufacturer and whether it is available as a 24c registration.
The document can be accessed by clicking on “Crop Info”, “Potato” and “2007 PNW Potato Insect Management Guidelines” or by going to the following web address: http://www.potatoes.com/Research-IPM.cfm.
Fruitgrower Meeting Wednesday June 6th
Tree Fruits Treasure Valley - Idaho
Posted on: May 31, 2007 by Tony McCammon
Fruitgrower meeting next wednesday 12:00 Marsing Sandbar restaurant. Just over the Bridge driving into marsing take a right.
Tom Tankersly will give us updates on orchard scouting observations
Tony McCammon will lead discussion on drought conditions and Cherry mildew information
For any questions contact Tony McCammon at 642-6022
or email at tonym@uidaho.edu
Western Cherry Fruit Fly
Tree Fruits Treasure Valley - Idaho
Posted on: May 30, 2007 by Tony McCammon
Western Cherry Fruit Fly (Sweet and tart cherry): Western cherry fruit fly adults have been caught in locations of Emmett May 25th and Sunny Slope May 29th. Based on numerous years of observation in Idaho, fruit is not susceptible to egg-laying from cherry fruit fly females until it changes from yellow to a salmon or blush color. When the earliest maturing fruit on the tree takes on a blush color, protect cherries with an insecticide application. Based on research, adult females are not ready to lay mature eggs until 7-10 days after first catch of the season. Use these two pieces of information for your location to initiate insecticide sprays to protect fruit from cherry fruit fly.
Insecticides effective for WCFF:
- Spinosad GF-120 NF (apply with an electric pump sprayer mounted on a 4-wheeler; reapply every 7 days; excellent adulticide; not rainfast)
- Provado (moderate adulticide, excellent larvicide, can kill larvae within fruit; reapply every 14 days; watch for mite flare-up with repeated applications)
- Success and Entrust (reapply every 7 days)
- Dimethoate (Be careful follow instructions closely)
- Guthion (reapply every 14 days; 15 day PHI)
- Sevin (reapply every 7 days; watch for mite flare-up with repeated use)
- Diazinon (reapply every 7-10 days; 21 day PHI)
- Malathion (reapply every 3 days; watch for mite flare-up with repeated use)
Snake River Weed Research Tour
Announcements All Locations
Posted on: May 23, 2007 by Nora Olsen
Mark your calendars now for the Snake River Weed Research Tour. The tour will be held at the Aberdeen R&E Center on June 19 and at the Kimberly R&E Center on June 20. Both locations will start with registration at 8:00 am and the tour begins at 8:30. They will conclude with an industry sponsored lunch at 12:00.
At Aberdeen the tour will focus on weed control research in potatoes.
At Kimberly the tour will feature weed control research in Roundup Ready sugar beets, spring wheat and barley, field corn, and potatoes.
For more information, contact Don Morishita at 736-3600 or Pamela Hutchinson at 423-4691.
Coddling moth and W. Cherry Fruilt Fly
All Crops Treasure Valley - Idaho
Posted on: May 18, 2007 by Tony McCammon
I wanted to update Coddling moth Spray dates. The morning of May 15th was the 250DD or first Hatch Date for coddling moth in Fruitland, Snake River Valley, Parma, and Sunny Slope. Emmett hit first hatch yesturday morning, May 17th. Coddling moth maximum larva hatch will be between May 21 and June 10 applications of insecticide are critical during this time period. Chemical applications
eggs: Horticultural oil, Esteem, Confirm, Intrepid, Azatin
larvae: Assail, Asana, Calypso, Carbaryl, Clutch, Diazanon, Guthion, Codling Moth Granulosis Virus, Imidan, Warrior, Sevin, Malathion
*Reapply insecticides based on the residual period (i.e., protection interval) of the product used, and be sure to rotate among pesticide classes.
Western Cherry Fruit Fly Control
Method 1: Fruit Maturity
Cherry fruits are not susceptible to egg-laying by adult females until they ripen to a salmon blush in color. Green fruits will not be attacked. Consider the maturity of the ripest fruit in an orchard, not the average.
Method 2: Adult Trapping
Adult flies do not use sexual pheromones, but are attracted to certain colors and odors. Yellow sticky panel traps (Pherocon AM®) with an external bait of ammonium carbonate (AC) are a moderately effective monitoring tool; unbaited traps should not be used. Place traps in cherry orchards before the first fly is expected [750-800 degree-days (DD)]in Sunnyslope flies were seen May 10, or by mid-May. Apply the first insecticide treatment 5 - 7 days or (190 DD-May 19) after first catch (females require 5 - 7 days for ovaries to mature.
For home and commercial orchards:
• spinosad (GF-120, Success, Entrust) – reapply every 7
days
• carbaryl (Sevin) – reapply every 7 days
• malathion (Malathion) – best when used just before
harvest as it lasts approximately 3 days
• synthetic pyrethroid insecticides – reapply every 7-14 days
∙ cyfluthrin (Baythroid) – commercial use only
∙ esfenvalerate (Asana, Ortho products)
∙ lambda-cyhalothrin (Warrior) – commercial use only
∙ permethrin (Ambush, Pounce, Ortho products)
For commercial orchards only:
• imidacloprid (Provado) – reapply every 14 days
• azinphosmethyl (Guthion) – reapply every 14 days
(scheduled for phase-out by 2012 by the U.S. Environmental Protection Agency)
• phosmet (Imidan) – reapply every 14 days; do not
use on sweet cherry
• chlorpyrifos (Lorsban) – reapply every 14 days; do
not use on sweet cherry
• diazinon (Diazinon) – reapply every 10-14 days
Western Cherry Fruit Fly
Tree Fruits Treasure Valley - Idaho
Posted on: May 16, 2007 by Jerry Neufeld
Ben Simko, Program Manager from ISDA has prepared a letter showing the predicted emergence dates for Western Cherry Fruit Fly for several areas in the Treasure Valley. To read the letter click on “Crop Info”, “Tree Fruit”, “Cherry”, “Western Cherry Fruit Fly” and lastly the link entitled “Western Cherry Fruit Fly predicted emergence for 2007”.
Approved Section 18 and 24c labels
Announcements All Locations
Posted on: May 10, 2007 by Jerry Neufeld
A complete list of approved section 18 and 24c labels for Idaho and Oregon can be found at the following links:
Idaho
http://www.agri.state.id.us/Categories/Pesticides/registration/Section18.php
http://www.ag.uidaho.edu/ipm/24C%20labels.htm
Oregon
http://www.pnn.wsu.edu/pnnor.html#Section24cs
Fruitgrower Meeting
Tree Fruits Treasure Valley - Idaho
Posted on: May 8, 2007 by Tony McCammon
This is a reminder of Wednesdays May 9th Growers Meeting at Nichols Steak House. High noon!
See you there.
Degree Day Accumulations
Tree Fruits Treasure Valley - Idaho
Posted on: May 8, 2007 by Tony McCammon
Projected Degree days for Coddling Moth as of May 7th 2007.
Coddling Moth DD 150dd 250dd
Emmett May 9 May 20
Fruitland May 9 May 19
Parma May 11 May 22
Snake River Valley May 10 May 20
Sunny Slope May 12 May 22
At 150dd to 200dd apply Esteem 35WP or Intrepid 2F to control Coddling moth at the early egg laying period. For best control during this period supplement this treatment with Pheromone treatments.
Fruitgrower Meeting Fruitland
Tree Fruits Treasure Valley - Idaho
Posted on: May 3, 2007 by Tony McCammon
Universtity of Idaho Extension in Payette County will host a Fruitgrower meeting on May 9th at 12:00 noon at Nichols Steak House in Fruitland. Essie Fallahi will lead a discussion on nutrient management of side blooms on apples, Kelly Henggeler will lead a discussion on labor issues, and Tom Tankersley on an orchard scouting update.
A second meeting will be offered on June 6th in Marsing at the Sand Bar Resturaunt. More information will follow.
Coddling Moth Degree Day Update
Tree Fruits Treasure Valley - Idaho
Posted on: May 3, 2007 by Tony McCammon
Temperatures are estimated days when said Degree days will be achieved.
Coddling Moth DD ActualDD 100dd 150dd 250dd
Snake River Valley 91.3 May 4 May 9 May 19
Fruitland 94.6 May 4 May 10 May 20
Sunny Slope 93.1 May 6 May 12 May 22
Parma 80.3 May 6 May 12 May 22
Approved Section 18 & 24c Labels for Idaho, 2007
Announcements All Locations
Posted on: May 1, 2007 by Jerry Neufeld
To view the current list of Section 18 and 24c labels for Idaho click on the following links: "Crop Info" "Announcements" and "Approved Section 18 and 24c Labels for Idaho, 2007".
Lygus
Alfalfa Seed Treasure Valley - Idaho
Posted on: April 30, 2007 by Jerry Neufeld
Right now the lygus degree day model is predicting that the 1st and 2nd instar lygus populations will peak May 6. Since we are expecting a cool down by mid-weak this may get pushed back some, but you should be getting ready to check seed fields for lygus and other early season pests. Unless you are treating with Rimon alone, you should consider treating if Lygus populations exceed 4 to 5 per sweep. If you are treating with Rimon alone you should treat before large numbers of large lygus nymphs appear. If you have 8 to 10 nabids (damsel bugs) plus geocoris (bigeyed bugs) per sweep, which is not likely this time of year, you may not need to treat. Treatment recommendations (other than Rimon) can be found in the Pacific Northwest Insect Management handbook (online at: http://pnwpest.org/pnw/insects ). We have some fields in the area that show resistance to bifenthrin (Capture/Discipline, etc.), so be sure to rotate chemistries to minimize resistance problems. In fields that have bifentrin resistance problems, bifentrin will tend to work best early season.
Onion Bulb Mites
Onion Treasure Valley - Idaho
Posted on: April 27, 2007 by Jerry Neufeld
Lynn Jensen, Potato and Onion Specialist with OSU at the Malheur County Extension Office is reporting Bulb Mites have been identified in an onion field in the Adrian, Oregon area. At least some stand reduction has occurred because of the mites.
According to the PNW Insect Management Handbook, Bulb mites are shiny, creamy white, bulbous, and about 1⁄32 inch long. They generally occur in clusters, inhabiting damaged areas under the root plate of onion bulbs or garlic cloves. They have a wide host range, feed on many kinds of bulbs, roots, and tubers, and can infest bulbs in storage or in the field. Bulb mites can survive on decaying vegetation in the field until it is completely decomposed.
Bulb mites damage bulbs by penetrating the outer layer of tissue and allowing rot organisms to gain entry. This pest is most damaging when plant growth is slowed by mild, wet weather. Bulb mites can reduce plant stands, stunt plant growth, and promote rot of bulbs in storage. On seeded onions, they can cut off the radicle before the plant becomes established.
Onion Maggot
Onion Treasure Valley - Idaho
Posted on: April 27, 2007 by Jerry Neufeld
Lynn Jensen, Potato and Onion Specialist with OSU at the Malheur County Extension Office is reporting an Onion Maggot infestation has been found in an onion field in the Cairo production area near Ontario. Onion maggot larvae attack germinating seedlings, feeding on the developing roots and epicotyl, and can continue to feed on the expanding bulbs during later stages of growth. This results in increased rot in bulbs held in storage.
ISDA Pesticide Disposal Program
Announcements Treasure Valley - Idaho
Posted on: April 27, 2007 by Jerry Neufeld
IDAHO STATE DEPARTMENT OF AGRICULTURE’S NORTH IDAHO SPRING PESTICIDE DISPOSAL PROGRAM
Collections scheduled for southwestern Idaho are safe, legal and free
NAMPA, Idaho – Southwest Idaho agricultural producers, dealers, applicators and homeowners who are storing unusable pesticides will have a safe, legal and free opportunity to dispose of them this May when the Idaho State Department of Agriculture conducts pesticide disposal collections in Canyon County and Washington County.
Participation is free for the first 1,000 pounds of unusable pesticides per participant. Anyone with unusable herbicides, insecticides, fungicides and rodenticides should bring them to the closest collection site between the hours of 9:00 a.m. and 1:00 p.m. on the date and location listed below (sorry no fertilizer, micronutrients, paint, solvents or motor oil can be accepted):
Date City Location
NAMPA MAY 14, 2007 PICKLES BUTTE LANDFILL
15500 Missouri Ave., Nampa, ID
WEISER MAY 15, 2007 IDAHO DEPARTMENT OF
TRANSPORTATION YARD
550 Indian Head Road, Weiser, ID
“These collections provide a mechanism for disposing of pesticides in an environmentally sound manner,” said Victor Mason II, manager of the department’s pesticide disposal and container recycling programs.
Since 1993, the Idaho State Department of Agriculture has safely disposed of more than three quarters of a million pounds of unusable pesticides. Pesticides become unusable for many reasons, including loss of potency, exposure to temperature extremes, cancellation or suspension by state or federal authorities, or growers’ decisions to change their cropping rotations or practices.
For more information about the collections, please see our website at: http://www.agri.idaho.gov
Or call us at (208) 465-8442, or you may also call us at the Boise office at
(208) 332-8605.
lygus bug
Alfalfa Seed Treasure Valley - Idaho
Posted on: April 23, 2007 by Jerry Neufeld
The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition (http://pnwpest.org/cgi-bin/ddmodel.pl?spp=lyg) shows that we have accumulated about 160 growing degree days (GDD) since January 1, 2007. Peak emergence of lygus bug 1st and 2nd instar nymphs should occur right around 275 accumulated GDD. This usually, but not always, occurs around mid-May and is the time monitoring for lygus bugs in alfalfa seed fields should begin. The model is currently predicting we will hit 275 approximately May 6. In 2006, we hit 275 GDD on May 15, so we are currently running about 9 days ahead of last year.
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 Rimon as a stand-alone spray should treat as soon as early instar nymphs are detected. You can monitor degree day accumulation using the link provided above and selecting:
1) The” lygus bug [alfalfa seed]Ben Simko 2000” degree day model from the drop down box at the top of the form
2) None in the ‘Oregon, Canada, Alaska” and “Montana, Wyoming” location boxes
3) “Parma ID Agrmt” in the “Washington ,Wyoming” location box
4) “Caldwel ID” from the “Forecast”…“weather.com” drop down box
5) The defaults for the other boxes should work fine: just be sure that the start date is January 1, 2007 and the ending date covers the time you are interested in forecasting.
6) Finally, click the “Calc” near the bottom of the form. The degree day accumulation to date plus the forecast extending to whatever ending date you selected will appear in a new window. I will provide additional updates as the 275 degree day accumulation approaches.
Provided by Dr. Jim Barbour from the UI Parma Research and Extension Center.
