Crop Alerts
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powdery mildew in sugarbeets
Sugarbeets none
Posted on: July 12, 2002 by Jerry Neufeld
Powdery mildew has been found in a sugarbeet field east of Notus. Amalgamated Sugar Company provided this information.
Powdery Mildew in Sugarbeets
Sugarbeets none
Posted on: July 9, 2002 by Jerry Neufeld
Agronomists from the Amalgamated Sugar Company have found Powdery Mildew in sugarbeet fields in the Ontario area. If you are planning to apply a preventative treatment for Powdery Mildew you may want to scout your fields for Black Bean Aphid prior to the treatment. Both treatments can be applied together if necessary. If more than one treatment per year is used, remember to alternate active ingredients since powdery mildew can build up chemical resistance quickly.
Black Bean Aphid in Sugarbeets
Sugarbeets none
Posted on: July 9, 2002 by Jerry Neufeld
Black Bean Aphids have been found in sugarbeet fields south of Nampa in numbers requiring treatment. Aphids can be found in the center of the whorl of sugarbeet leaves. This information provided by Landview Fertilizer.
O.S.U. Malheur Experiment Station Field Day
Announcements none
Posted on: July 1, 2002 by Ben Simko
The O.S.U. Malheur Experiment Station will hold its summer field day on Wednesday July 10th. Field day registration will run from 7:45 to 9:00 a.m. with tours starting at 9:00 a.m. Lunch will be provided following the tours. Please RSVP for lunch by contacting Jan Jones, MES, at 889-2174 or janet.jones@orst.edu
Powdery Mildew on Potatoes
Potato none
Posted on: June 27, 2002 by Lynn Jensen
Powdery mildew was positively identified on a red potato variety from a garden in Ontario. This early for powdery mildew to infect potatoes. Potatoes grown under furrow irrigation, in particular are at risk and should be treated with a protectant, either sulfur or Quadris (or both).
Onset of Lygus Hatch in Alfalfa Seed Observed
Alfalfa Seed none
Posted on: June 26, 2002 by Ben Simko
At the U of I, Parma Experiment Station, Jim Barbour and I are conducting alfalfa seed insecticide efficacy research using Capture + dimethoate as a standard “clean up” treatment as well as evaluating the performance of some newer chemistries. At the Monday, June 24th, 14 days post treatment sweep counts, we are detecting a big hatch of small 1-2 instar Lygus nymphs (20-30/sweep) in the station plots. The onset of this first bloom period hatch is confirmed in other areas by Lynelle Drake’s, Andrews Seed Co. scouting program. Growers and seed company fieldmen are advised to begin regular sweep sampling to survey fields for this hatch and begin planning for their bloom period insecticide treatments. Proper timing of these bloom sprays is critical to maximize control of Lygus infestations using our limited set of bloom insecticides.
Corn Rootworms
Corn none
Posted on: June 25, 2002 by Jerry Neufeld
Corn Rootworm larvae have been found in several field corn fields south of Kuna. Larvae will feed on root hairs and tunnel into the roots for about a month before they reach maturity. Adults feed on tender portions of the plant, especially pollen and silks. Thanks to Jim Hipwell from Bio Flora Northwest for providing this information.
Wheat and Barley Field Tour
Announcements All Locations
Posted on: June 24, 2002 by Jerry Neufeld
Dr. Brad Brown is hosting a Wheat and Barley Variety Review and Field Tour at the Parma Research and Extension Center on June 26, 2002 starting at 9:30 a.m. Topics to be covered are Irrigated Cereal Variety performance and update on Cereal Leaf Beetle. Please RSVP by the end of Tuesday June 24 to reserve a hosted lunch with homemade ice cream. (208.722.6701 ext. 216)
Late Blight on Potato in Washington State
Potato All Locations
Posted on: June 20, 2002 by Brad Geary
Late blight was positively identified in Washington during the first week of June. Since that time more fields have been identified. Late blight has not been found in Idaho or Eastern Oregon. Protective spray programs should be initiated and maintained during the year. Scout fields twice and week and pay particular attention to areas of fields that have, or receive, extra water. If you would like current updates on late blight in Idaho, Washington and Oregon call:
Idaho - 1-800-791-7195
Washington - 1-800-984-7400
Oregon - 1-800-705-3377
Early blight has been found in several Treasure Valley potato fields, and can be monitored while scouting for late blight.
Aphids in Red Clover Seed Fields
Clover Seed none
Posted on: June 18, 2002 by Ben Simko
Lynelle Drake of Andrews Seed Co. reports finding unusual two-aphid species infestations of red clover seed fields near Adrian OR. The species involved in this combo attack are the perennial pest, the clover aphid (a.k.a. clover head aphid) and the cross over pest from alfalfa, the spotted alfalfa aphid. Special attention is required in scouting and insecticide selection if both aphid species are present and damaging clover florets. Contact your seed company agronomist or fieldmen for help in identification and management recommendations.
Adult Western Cherry Fruit Fly Found in traps
Tree Fruits All Locations
Posted on: June 10, 2002 by Tim Davis/Will Cook
An adult Western Cherry Fruit Fly was found in a trap in the Emmett area on June 7th. Cover sprays should be added if not already.
alfalfa weevil
Alfalfa none
Posted on: June 7, 2002 by Jerry Neufeld
Heavy populations of alfalfa weevil are being found in alfalfa hay fields south of Nampa and in the Kuna area. This information provided by Landview Fertilizer.
spotted alfalfa aphid
Alfalfa Seed All Locations
Posted on: June 7, 2002 by Jerry Neufeld
Mike Huff from Dairyland Seed is reporting spotted alfalfa aphids in alfalfa seed field across the Treasure Valley. He is finding both winged and wingless aphids. Mike advises to keep this in mind as you apply clean up sprays.
spotted alfalfa aphid
Alfalfa none
Posted on: June 6, 2002 by Jerry Neufeld
Spotted alfalfa ahpids are being found in new alfalfa hay seedings and alfalfa seed fields south of Nampa at levels requiring treatment. Producers Supply Coop.is reporting this information.
curlytop in sugarbeets
Sugarbeets All Locations
Posted on: June 6, 2002 by Jerry Neufeld
Curlytop virus has been found in sugarbeet fields in several locations around the Treasure Valley. Amalgamated Sugar Company is reporting that the virus is not widespread. Contact your field representative if you have suspect fields.
root maggots
Sugarbeets none
Posted on: June 6, 2002 by Jerry Neufeld
Amalgamated Sugar Company is reporting that a few sugarbeet root maggots are being found in fields in the Parma, Notus, Wilder area. Watch for these insects as insecticides applied at planting may be losing effectiveness.
Cereal Leaf Beetles Infests Winter and Spring Wheat
Small Grains All Locations
Posted on: June 3, 2002 by Ben Simko
A fieldman with Simplot Soil Builders, Ontario has discovered hot spots of Cereal Leaf Beetle (CLB) infestations in spring and winter wheat near Fruitland, Idaho. In these fields egg hatch is complete with the CLB populations predominately in the medium to large size larval stages. An unusually heavy infestation of over 1 larva per flag leaf was observed in a winter wheat field just south of town. Other wheat fields had CLB injury levels ranging from 10 to 50% infested or damaged flag leaves. Fieldmen and growers are advised to monitor populations of CLB larvae to assess potential economic damage to small grains. At this time it is important to prevent damage to the flag leaf as the wheat plant moves from the boot to heading, anthesis, and kernel filling growth stages. See CLB Reference Page for more information on identification, action thresholds and crop protection chemicals.
Colorado Potato Beetle and Volunteer Potatoes
Potato All Locations
Posted on: May 24, 2002 by Brad Geary
Colorado potato beetles have been found on many volunteer plants and in a couple of commercial fields. Populations of beetles are far from economic threshold levels requiring control, however, be mindful of populations within fields so they can be managed properly. Also, it is important to control volunteer potato plants, if not these plants can serve as sources of inoculum for a number of diseases. This includes plants from cull piles. Volunteer potatoes are very competitive for light, water and nutrients, and will cause yield reductions in a crop unless they are controlled.
Clover Seed - Two Spotted Spider Mite
Clover Seed none
Posted on: May 24, 2002 by Jerry Neufeld
Two Spotted Spider Mites have been found in second year clover seed fields in the Marsing area.
Sugarbeet Root Maggot
Sugarbeets All Locations
Posted on: May 23, 2002 by Jerry Neufeld
According to the sugarbeet root maggot growing degree day model developed by Dr. Ed Bechinski from the U of Idaho, we accumulated 360 growing degree days as of May 13, 2002. For the past 7-10 days overwintering root maggot pupa have been emerging as adults and flying. Now is the time to be on the lookout for maggots feeding on sugarbeet roots, especially in replanted fields. Terry Cane from The Amalgamated Sugar Company has already confirmed the siting of adult root maggot flies.
Western Cherry Fruit Fly Activity
Tree Fruits All Locations
Posted on: May 21, 2002 by Tim Davis
Using temperature data from the Caldwell weather station the degree day model is predicting Adult Emergence on May 30, eggs laid on first fruit on June 5, and first egg hatch by June 9. The weather station in Parma is predicting the same dates. The weather station in Ontario predicts all activity four days earlier.
Coddling Moth Degree Days Near 250
Tree Fruits All Locations
Posted on: May 21, 2002 by Tim Davis
As of May 20th the Ontario weather station is reporting 189 degree days and forcasting accumulation of 250 dd's (3% hatch) on May 26. The Caldwell weather station reports 176 dd's and forcasts 250 dd's on May 28. The Parma weather station reports 178 dd's and also forcasts 250 dd's on May 28. Your first cover spray should be prior to these listed dates depending on your location.
Sugarbeet Leafhopper
Sugarbeets All Locations
Posted on: May 17, 2002 by Jerry Neufeld
Terry Cane from the Amalgamated Sugar Company is reporting that sugarbeet leafhoppers have been found in sugarbeet fields at several locations across the Treasure Valley in Idaho and Oregon. Leafhoppers are vectors of the curly top virus. Call your field representative from TASCO for more information.
Cereal Leaf Beetle
Small Grains All Locations
Posted on: May 17, 2002 by Jerry Neufeld
Cereal leaf beetle larvae are being reported south of Nampa, near Middleton, and west of Homedale to the Oregon border. Populations are heaviest in spring grains. U of I Extension Soil and Crop Management Specialist Brad Brown has included a "Cereal Leaf Beetle" update in the latest edition of the Cereal Sentinel (http://agweb.ag.uidaho.edu/swidaho.). Information provided by Land View Fertilizer Inc.
Mormon Crickets
Rangeland All Locations
Posted on: May 16, 2002 by Jerry Neufeld
Michael E. Cooper from the Idaho Department of Agriculture reports Mormon Crickets Emerging En masse' Across the Boise Front.
Mormon Crickets are being reported from the Danskin Mountain/Blacks Creek road area east of Mountain Home to Rocky Canyon outside of Boise and the Summit of Horseshoe Bend Hill on Highway 55. In excess of 24 bands of migrating crickets have been observed between Mayfield and the road to the Danskin Mountains in Elmore County. One of the biggest Bands of migrating crickets is on Horseshoe Bend Hill East of Hwy 55 extending a mile or two up the ridge.
Control measures have been undertaken in Elmore County with more being planned. Boise County has declared a local emergency due to the threat to traffic on Highway 55. Boise County and ISDA officials are reviewing options to see what can be done to prevent the crickets from affecting vehicle traffic on the hill. Large numbers of crickets crushed by passing vehicles can cause hazardous driving conditions by making the road slick.
There have also been reports of crickets in Owyhee County near Murphy.
