corn earworm
Dr. Jim Barbour from the UI Parma R and E Center, Terry Clinton from Crookham Company and I are once again collaborating on a project to trap corn earworm moths across the Treasure Valley. We set out 14 traps at various locations from near Melba to near Weiser. I check the traps once a week and post the moth counts to this website. Click on the pdf below for this week’s moth count. Purdue University recommends the treatment threshold to be 10 moths per trap per night.
sugarbeet root aphids
UI Extension Entomologist Erik Wenninger is reporting that sugar beet root aphids have been observed on the roots of common lambsquarters within sugar beet fields in Kimberly. Aphids have not yet been observed on adjacent beets, but they are expected to move to beets soon. Sugar beet root aphids may be pinhead sized and up to 5/64-inch (2 mm) long. They are pale whitish yellow and broadly oval to pear shaped. They secrete white, waxy strands, which give beets a distinctive “moldy” appearance. Severe infestations may reduce tonnage and sucrose levels. There are no rescue insecticide options available; when root aphids are found attacking beets, cultural control practices should be followed (see below).
Sugar beet root aphids feed on the roots of sugar beet plants, but will also attack closely related species, including spinach, table beets, common lambsquarters, and pigweed. Pulling alternate weed hosts found within or adjacent to sugar beet fields and inspecting the roots for aphids and distinctive wax secretions may be a convenient method of preliminary scouting. If aphids are found on weeds, then nearby sugar beets should be examined as well.
When root aphid infestations are found on sugar beets, careful maintenance of a proper irrigation schedule is the single most important cultural control tool available. Damage by root aphids is exacerbated when plants are drought stress (conversely, diseases are encouraged when plants are over irrigated), so an optimal irrigation schedule will enhance the ability of the crop to resist attack from aphids. In addition, good management of alternate weed hosts (including lambsquarters, dock, pigweed, and prostrate knotweed) is important, and care should be taken to avoid contaminating uninfested fields with soil or irrigation water from an infested field. The use of resistant sugar beet varieties may be considered for future plantings.
corn earworm
Dr. Jim Barbour from the UI Parma R and E Center, Terry Clinton from Crookham Company and I are once again collaborating on a project to trap corn earworm moths across the Treasure Valley. We set out 14 traps at various locations from near Melba to near Weiser. I check the traps once a week and post the moth counts to this website. Click on the pdf below for this week’s moth count. Purdue University recommends the treatment threshold to be 10 moths per trap per night.
Treasure Valley Soybean Tour
Treasure Valley Soybean Tour
Tentative Agenda
10 AM – 3:00 PM, August 24, 2010, Lunch Provided
Tour will start from the just north of Willow Creek at the junction of Hwy. 26 and 10th Ave. East.
10:00 AM Meet at Jerry Erstrom’s Soybean Field - just north of Willow Creek at the junction of Hwy. 26 and 10th Ave. East.
10:20 AM Leave Erstrom’s for Dave Patchett’s Organic Soybean Field
10:50 AM Arrive Dave Patchett’s Organic Soybean Field
11:10 AM Leave Patchett’s for Skyline Farm
11:30 AM Arrive Skyline Farm
11:50 AM Leave for Ontario (Malheur Extension Office)
12:10 PM Arrive Malheur Extension Office for Lunch Sponsored by Asgrow, Dekalb (Dan Rongen) and Croplan Genetics (Rick Spiecher)
12:30 PM Pendleton Grain Growers Interest in Soybeans (Not Confirmed Yet), Jon Sperl,
12:50 PM Leave for Parma R & E Center to look at Relay Cropping and Varieties
1:20 PM Leave for Syngenta R & E Center
1:50 PM Arrive Syngenta R & E Center (Ten miles north of Caldwell on
2:10 PM Tour Over and Drive Home
