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corn earworm
Corn Treasure Valley - Idaho
Posted on: August 11, 2005 by Jerry Neufeld
The next generation of corn earworm moths will lay eggs in the silk of corn between 1450 and 1650 growing degree days (GDD). GDD accumulations for Caldwell, Nampa and Parma respectively are 1424, 1374 and 1462. If you have late silking corn you will want to continue scouting for earworm eggs.
Corn earworm
All Crops Treasure Valley - Idaho
Posted on: August 11, 2005 by Jerry Neufeld
The next generation of corn earworm moths will lay eggs in the silk of corn between 1450 and 1650 growing degree days (GDD). GDD accumulations for Caldwell, Nampa and Parma respectively are 1424, 1374 and 1462. If you have late silking corn you will want to continue scouting for earworm eggs.
Corn Earworm
Corn Treasure Valley - Idaho
Posted on: July 29, 2005 by Jerry Neufeld
According to the Oregon State University Growing Degree Day (GDD) model for Corn Earworm (http://pnwpest.org) we are currently at approximately 1110 GDD in the Treasure Valley. Summer moths will begin laying eggs in fresh corn silk at approximately 1300 GDD. The GDD model is predicting egg hatch will begin on August 4. Those fields silking at this time are most vulnerable to attack. University of Idaho CIS 366 entitled “Timing Corn Earworm Control” states that “no chemical control will control worms in the ears, so sprays must be timed to control the larvae on the silk before the worms enter the ears. Make the first application when the plants are 50 percent silk, and repeat in 5 to 7 days or as necessary.”
Iris Yellow Spot Virus
Onion Treasure Valley - Oregon
Posted on: July 27, 2005 by Jerry Neufeld
Lynn Jensen from the Oregon State University, Malheur County Cooperative Extension Office is reporting that Iris Yellow Spot Virus has been identified in onion fields in the Treasure Valley area including fields in Weiser, Fruitland, Ontario and Nyssa. There are currently no known fungicide treatment options for this virus. The virus is transmitted by onion thrips. Growers should keep their fields as stress free as possible by keeping thrips populations in check and by maintaining good irrigation practices.
Organic Potato Field Day August 8
Announcements All Locations
Posted on: July 25, 2005 by Nora Olsen
******* FIELD DAY ANNOUNCEMENT ********
Organic Potato Field Day
Monday, August 8, 2005
Sunset Butte Organics near Buhl, Idaho
10 am - 3 pm
******** FIELD DAY ANNOUNCEMENT ********
Potato Growers of Idaho, the Northwest Coalition for Alternatives to Pesticides and Rural Roots invite you to attend a tour of Sunset Butte Organics' potato farm on August 8 near Buhl, Idaho. Mike Heath of Sunset
Butte Organics, along with other organic potato growers, will discuss rotation crops, fertility and pest management and marketing. John O'Connor, an organic grower and former organic inspector, will speak about the organic certification process and on-farm inspection. Mir Seyedbagheri, Juan Alvarez and Nora Olsen from the University of Idaho will share their work on organic potato fertility, beneficial insects and organic sprout inhibitors. Enjoy a delicious meal of organic beef and freshly picked fruits and vegetables.
Please RSVP by August 3, 2005 with Keith Esplin at 785-1110 or pgike@cableone.net or Jen Miller at 850-6504 or millerjen12@aol.com. Support for this field day also comes from the following businesses: Frontier Natural Products Co-op, Magic Valley Compost, Mountain States Oilseeds and Pillar Butte Seed.
DIRECTIONS TO THE FIELD DAY: From Boise - Exit I-84 at Bliss. Travel south on Hwy 30 through Hagerman. After leaving the canyon, head south to the first 90°
curve and go straight (leave Hwy 30) onto 1000 E Rd. The road will wind around. At first T intersection, turn left onto 4200 North Rd. After 200 yards, take a right onto 1000 East Rd and travel 1 mile. At next T
intersection, turn left onto 4100 North Rd. After 200 yards, take a right onto 1000 East Rd and travel 3 miles. Turn right onto 3800 North Rd and travel 1 mile. Meet at house with shady front yard and Sunset Butte Organics sign (3800 N 912 E). From Twin Falls - Take Hwy 30 (truck route) towards Buhl. Travel west through Buhl on Burley Ave, which becomes Deep Creek Rd and then 4100 North Rd) for 4 miles. Turn left onto 1000 East Rd and travel 3 miles. Turn right onto 3800 North Rd and travel 1 mile. Meet at house with shady front yard and Sunset Butte Organics sign (3800 N 912 E).
Late blight found in southern Idaho
Potato All Locations
Posted on: July 19, 2005 by Jeff Miller
Late blight was confirmed in Canyon County this morning (July 19, 2005). The blight appeared to have started in a spot that looked like a drowned-out spot. Further investigation showed that lesions were scattered throughout the field. A second field nearby was found to have a very light infestation.
The typical light-green halo that usually surrounds late blight lesions was not present on the infected leaves early in the morning when the leaves were wet. As the leaves dried out, the characteristic halo did appear. However, white sporulation was visible on leaves in the early morning dew.
Growers in the Treasure Valley who do not have late blight should spray immediately if no applications have been made and continue on a weekly basis with a protectant fungicide. As long as the weather remains hot and dry, spread of the pathogen will be slow. If late blight has been confirmed in a field, stronger products such as Curzate®, Acrobat®, and Previcur® can be mixed with the protectants (TanosTM is a combination of the active ingredient in Curzate® and famoxate, which is similar in activity to strobilurins). Stand alone products like Omega® and Gavel® have also shown good protection against tuber blight. If you have any question about fungicide usage please contact the University of Idaho personnel listed at the end of this email.
As long as the weather remains hot and dry, growers in other regions of the state can stay on a 10-14 day program. However, fields need to be scouted intensively. The weather in Canyon County has been hot and dry. The late blight has most likely been present for a while, but was limited in expression due to the hot dry weather. Spring conditions were extremely favorable for the late blight pathogen to get established. The threat of late blight is high for all areas of the state and most likely will appear in other areas soon. Scout wet areas in fields 2-3 times each week.
If you find any suspicious symptoms, please contact University of Idaho personnel:
Mike Thornton (Treasure Valley): 722-6701
Nora Olsen (Magic Valley): 736-3600
Phil Nolte (Idaho Falls): 529-8376
Bill Bohl (Blackfoot): 785-8060
Jeff Miller (Aberdeen): 397-4181
All field specific information will be held strictly confidential.
Withdrawal of the SLN registration for Eminent on Sugar Beet
All Crops Magic Valley
Posted on: July 19, 2005 by Jerry Neufeld
Dr. John Gallian, Sugarbeet Specialist and Plant Pathologist at the University of Idaho Twin Falls R&E Center posted this message to the UIsugarbeet-INFO digest regarding registration for Eminent Fungicide.
Today the US EPA has ordered the Idaho Department of Agriculture to withdraw the Special Local Needs registration 24(c) for Eminent fungicide for use on sugarbeets for powdery mildew and Cercospora leafspot control that was issued on June 3, 2005. We will not be able to use the material this year.
Eminent is in a different class of fungicides than either our currently registered strobilurins or the benzimidazole. We attempted the registration because it was an important tool for fungicide resistance management.
corn earworm
Corn Treasure Valley - Idaho
Posted on: July 19, 2005 by Jerry Neufeld
According to the Oregon State University Growing Degree Day (GDD) model for Corn Earworm (http://pnwpest.org) we are currently at 941 GDD in Caldwell and 954 GDD in the Parma area. We are currently accumulating about 22 GDD each day. First generation summer moths will begin laying eggs in fresh corn silk at approximately 1300 GDD. Eggs will hatch a few days after reaching 1300 GDD and the larvae will then begin feeding on the ears. Those fields silking after 1300 are most vulnerable to attack.
The GDD model is predicting we will reach 1300 GDD on July 31 or August 1 and that earworm eggs will begin hatching about August 4 or 5 in both the Parma and Caldwell areas respectively. As we approach the start of egg hatch you will want to step up your field scouting and take the appropriate control measures to treat the larvae before they enter the corn ears.
Powdery Mildew in Sugarbeets
Sugarbeets Treasure Valley - Idaho
Posted on: July 13, 2005 by Steven Reddy
Powdery Mildew has been identified by Amalgamated Sugar Company Field Staff in the Middleton and Notus areas of the Treasure Valley.
In addition, Black Bean Aphid has been identified in the same fields. In many cases, an insecticide can be tank mixed with your Powdery Mildew treatment. Consult with your field representative for recommendations.
Malheur Experiment Station Field Day Wednesday, July 13th
Announcements All Locations
Posted on: July 12, 2005 by Clint Shock
The Malheur Experiment Station Field Day will be held this Wednesday, July 13th.
The schedule for this year is as follows:
8:30 (am) - 9:00
9:00 - 10:30
10:30 - 12:00
12:00 - 1:00
1:30 - 4:00
We'll also be showing off the new Mid-Snake River Watershed Vegetation Database after lunch.
Late blight
Potato All Locations
Posted on: July 12, 2005 by Jeff Miller
Late blight has been found in northern Idaho. Based on the pattern of disease in the field, it originated from seed.
This outbreak does not pose a threat to potato producers in southern Idaho. However, it does underscore the potential for blight development given the weather we have experienced this year. Conditions prior to the last few weeks were ideal for the establishment of an epidemic.
Scout wet areas twice weekly. An initial fungicide application be made just prior to row closure. An interval of 14 days is justified under our current hot, weather. If thundershowers develop, however, intervals will need to be shortened.
Crop Production Challenge
Announcements All Locations
Posted on: June 30, 2005 by Nora Olsen
The University of Idaho and USDA/ARS invite you to join us for the First Annual Crop Production Challenge on July 7, 2005 at the University of Idaho Kimberly R & E Center (3806 N. 3600 E.).
Registration from 8 to 8:30 am. The challenge will run from 8:30 to 3 pm with lunch provided for those who RSVP by July 5.
This is an educational event to test and increase the knowledge of crop advisors, consultants, extension educators, and other agricultural professionals; and have fun at the same time.
Pesticide applicator recertification credits and Certified Crop Advisor credits available.
Topics to include: Entomology, Plant Pathology, Weed Science, Potato Physiology, Soil Fertility, Irrigation Management, and Water Quality.
Call 736-3600 (Mary) to register or if you have any questions.
Powdery Mildew
All Crops Treasure Valley - Idaho
Posted on: June 22, 2005 by Jerry Neufeld
Amalgamated Sugar Company Field Representatives are saying that now is the time to plan your treatment for powdery mildew in sugarbeets. While mildew has not yet been found in the Treasure Valley, AMSCO Field Representatives say the modes of action of the mildew chemistries work best if treatments are applied before mildew is found in the field. AMSCO is recommending mildew applications in the west end of the Treasure Valley by July 5 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 FIELD REPRESENTATIVE FROM AMSCO FOR AMSCO'S TREATMENT RECOMMENDATIONS.
Powdery Mildew in Sugarbeets
All Crops Treasure Valley - Idaho
Posted on: June 21, 2005 by Jerry Neufeld
Amalgamated Sugar Company Field Representatives are saying that now is the time to plan your treatment for powdery mildew in sugarbeets. While mildew has not yet been found in the Treasure Valley, AMSCO Field Representatives say the modes of action of the mildew chemistries work best if treatments are applied before mildew is found in the field. AMSCO is recommending mildew applications in the west end of the Treasure Valley by July 5 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 REFERENDE PAGE FOR POWDERY MILDEW IN SUGARBEETS YOU SHOULD CONTACT YOUR FIELD REPRESENTATIVE FROM AMSCO FOR THEIR TREATMENT RECOMMENDATIONS.
Powdery Mildew in Sugarbeets
All Crops Treasure Valley - Idaho
Posted on: June 21, 2005 by Jerry Neufeld
Amalgamated Sugar Company Field Representatives are saying that now is the time to plan your treatment for powdery mildew in sugarbeets. While mildew has not yet been found in the Treasure Valley, AMSCO Field Representatives say the modes of action of the mildew chemistries work best if treatments are applied before mildew is found in the field. AMSCO is recommending mildew applications in the west end of the Treasure Valley by July 5 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 AN UPDATED REFERENCE PAGE FOR POWDERY MILDEW IN SUGARBEETS. YOU SHOULD CONTACT YOUR FIELD REPRESENTATIVE FROM AMSCO FOR THEIR TREATMENT RECOMMENDATIONS.
Powdery Mildew in Sugarbeets
All Crops All Locations
Posted on: June 21, 2005 by Jerry Neufeld
Amalgamated Sugar Company Field Representatives are saying that now is the time to plan your treatment for powdery mildew in sugarbeets. While mildew has not yet been found in the Treasure Valley, AMSCO Field Representatives say the modes of action of the mildew chemistries work best if treatments are applied before mildew is found in the field. AMSCO is recommending mildew applications in the west end of the Treasure Valley by July 5 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 AN UPDATED REFERENCE PAGE FOR POWDERY MILDEW IN SUGARBEETS. YOU SHOULD CONTACT YOUR FIELD REPRESENTATIVE FROM AMSCO FOR THEIR TREATMENT RECOMMENDATIONS.
Snake River Weed Control Tour
Announcements All Locations
Posted on: June 16, 2005 by Nora Olsen
You Are Invited to Attend
THE SNAKE RIVER WEED CONTROL TOUR
June 21 and 22, 2005
University of Idaho Locations: Aberdeen R&E Center (June 21st)and Kimberly R&E Center (June 22nd).
Registration begins at 8:00 A.M. with the tours starting at 8:30 A.M. Tours will conclude at noon with a sponsored lunch each day. Bring friends and associates. Idaho pesticide re-certification credits (3) will be offered.
Call Aberdeen at 208-397-4181 or Kimberly at 423-4691
for more information.
WE HOPE TO SEE YOU AT THE TOURS!!!
Stripe Rust in Small Grains
Small Grains Treasure Valley - Idaho
Posted on: June 16, 2005 by Jerry Neufeld
Dr. Brad Brown, Cereals Specialist with the U of Idaho at the Parma Research and Extension Center is reporting that stripe rust in spring grains is developing quite rapidly and we are approaching the growth stages that limit spray options. According the to “2005 PNW Plant Disease Handbook,” Headline and Quadris are the only products that can be used to the ”end of flowering” growth stage. In order to maximize yields in cereals it is important to protect the flag leaf from infection.
According to Dr. Brown, the most susceptible soft white spring cereals in the variety trial at the Parma R and E Center are Penewawa, Treasure, White Bird and Jubilee. If you are growing these varieties and haven’t yet scouted your fields, you should do so as soon as possible.
Small Grains Tour
Small Grains Treasure Valley - Idaho
Posted on: June 15, 2005 by Jerry Neufeld
Dr. Brad Brown, Cereals Specialist with the U of Idaho at the Parma Research and Extension Center is hosting a Small Grains Tour at the UI Parma R and E Center on Friday June 24, 2005 starting at 10:00 am. This year the tour provides an excellent opportunity to see the differences in susceptibility of various small grain varieties to stripe rust. A hosted lunch will be served at the conclusion of the tour. If you plan to attend, please call Maurine at 722-6701, ext. 228 to reserve a lunch. Mention the “Small Grains Tour.”
Stripe Rust
All Crops All Locations
Posted on: June 14, 2005 by Jerry Neufeld
Dr. Brad Brown, Cereals Specialist with the U of Idaho at the Parma Research and Extension Center is reporting that stripe rust in spring grains is developing quite rapidly and we are approaching the growth stages that limit spray options. According the to “2005 PNW Plant Disease Handbook,” Headline and Quadris are the only products that can be used to the ”end of flowering” growth stage. In order to maximize yields in cereals it is important to protect the flag leaf from infection.
According to Dr. Brown, the most susceptible soft white spring cereals in the variety trial at the Parma R and E Center are Penewawa, Treasure, White Bird and Jubilee. If you are growing these varieties and haven’t yet scouted your fields, you should do so as soon as possible.
Eminent Registration in Sugarbeets
Sugarbeets All Locations
Posted on: June 14, 2005 by Jerry Neufeld
Dr. John Gallian, Sugarbeet Specialist and Plant Pathologist at the University of Idaho Twin Falls R&E Center posted this message to the UIsugarbeet-INFO digest regarding registration for Eminent Fungicide.
Eminent 125SL (tetraconazole) has been given a 24(c) Special Local Need (SLN) registration for use in Idaho for powdery mildew and Cercospora leafspot control on sugarbeets. This registration will be valid beginning with the 2005 growing season through November 30, 2012.
This registration provides sugarbeet growers with a fungicide for resistance management that has a different mode of action than the strobilurins (Gem and Headline) and the benzimidizoles (Topsin M). Eminent is a sterol demethylation inhibitor (DMI) fungicide and should be applied in tank mix or in alternate applications with non- DMI fungicides. It belongs to the triazole group of fungicides.
Check our website at www.uidaho.edu/sugarbeet under "Pesticides" for more information on resistance management and under "Diseases" for Eminent powdery mildew efficacy data for each year since 2001.
Eminent 125SL is to be applied at 13 fl oz/acre and must be alternated with a non-triazole fungicide which is registered for sugarbeets. For the complete label, you can check the Idaho State Department of Agriculture website www.agri.state.id.us. Follow these links, "Programs & Services" "Pesticides" "Product Registrations" "Section 24c Labels."
Potato late blight forecast
Potato All Locations
Posted on: June 14, 2005 by Jeff Miller
The probability for late blight in southern Idaho is extremely high in 2005. The amount of precipitation and the number of hours favorable for late blight pathogen establishment have been very high all across southern Idaho. The probability of seeing disease ranges from 95-99%. These values are higher than what was observed in the bad late blight years of 1997 and 1998.
Protectant fungicides are very similar to sunscreen in that they wear off over time and only protect where they are applied. If thundershowers persist through the coming weeks, growers are advised to begin spraying at row closure and continue on a weekly schedule for 4 weeks. This can be done using standard protectant fungicides such as EBDC based products or chlorothalonil (See www.ag.uidaho.edu/potatopath/diseases_lateblight_fungicides.htm) While this is an expense most growers have not had in the past, the late blight pathogen does not care, and cool, wet weather can fuel an epidemic similar to what was seen in 1997.
Fungicide stocks will also be low this year due to soybean rust in the Midwestern U.S. Now is the time to line up the fungicides you plan to use this coming year. It is likely that some products may not be available later in the season.
Volunteers and infected tubers from storage pose a threat for establishing an epidemic in 2005. Many commercial storages in southern Idaho have sprouting cull piles even at this late date. Manage cull piles and volunteers in order to minimize the threat of late blight this coming season.
For more information, call University of Idaho Extension personnel at the following numbers:
Treasure Valley: 722-6701 (Mike Thornton)
Magic Valley: 736-3600 or 423-6621 (Nora Olsen)
Eastern Idaho: 529-8376 (Phil Nolte), 785-8060 (Bill Bohl), or 397-4181 (Jeff Miller)
Fireblight
All Crops Treasure Valley - Idaho
Posted on: June 8, 2005 by Steven Reddy
Weiser/Payette fruit grower, Bill Ford reported that his weather station "Cougarblight" model has indicated HIGH risk for fireblight this past week.
Stripe rust
All Crops Eastern Idaho
Posted on: June 8, 2005 by Juliet Windes
Stripe rust continues to spread, now north of American Falls. A Hot Topic Field Day will be held on Friday, June 10, 2005, at Meadows' dryland farm on Misenhimer Lane. Stan Gortsema and Juliet Windes will be on hand for a question and answer session. For additional details and directions, please visit the Southeast Southcentral Cereals Webpage (www.ag.uidaho.edu/scseidaho)
Onion Thrips
All Crops Treasure Valley - Idaho
Posted on: June 6, 2005 by Jerry Neufeld
According to the UC Davis IPM Website (http://www.ipm.ucdavis.edu/PHENOLOGY/ma-onion_thrips.html), over-wintering adult thrips lay eggs in the tissue of plants in the spring. The subsequent generation of onion thrips become adults at about 323 growing degree days. We reached that threshold a few days ago. Right now, both adults and nymphs are being found in onion fields. You should scout your fields now to determine the extent to which you have these pests because thrips populations must be kept in check early to prevent further damage when the onions move into the bulbing stage. If you are one of the growers using drip irrigation and have had success applying Vydate through the drip system now is the time to do so again. For growers using furrow irrigation now is the time to scout your fields and make treatments as necessary.
