New Web Address
Weather information and data links
Extending the life of alfalfa fields
Archived soybean rust web cast
Overview of soybean fungicide seed treatments
Don’t forget about the soybean aphid
Area soil temperatures appear to be running slightly above normal.
Frost should be out on most exposed and southern facing slopes.
Dr. Bruce Anderson
(Extension Forage Specialist, University of NE) provides some good
comments on extending the productivity of old alfalfa stands by
inter-seeding grasses to convert the alfalfa field to pasture. Dr.
Andersons article can be found in the March 11 issue of the Nebraska
Crop Watch, read his article at this URL:
http://cropwatch.unl.edu/. Useful ISU publications on forage
selection and pasture management can be found at these URL’s
Interseeding and no-till pasture
Selecting forage species:
Data collected by Dr. David Voegtlin (Illinois Natural History
Survey) indicate that the probability of soybean aphid infestations
may be higher this year. Fall suction trap catches and aphid egg
counts on buckthorn in Illinois indicate a high number of aphids
over-wintering, similar to numbers found the fall and winter of
2002/03. The linked article (written before all the fall data was
collected) provides information on the cyclical nature of soybean
aphids and provides information on how the data was collected.
Are you considering an insecticide
seed treatment for soybean aphid? Current research indicates that
the seed treatment most likely will not protect against the heaviest
populations of aphids usually observed in late July and August.
Insecticide seed treatments will protect against early aphid
infestations if a local aphid population over-winters but an
over-the-top insecticide treatment may be necessary to protect
against late season aphid migrations. More information here: Ohio
Soybean Fungicide Seed Treatment
A good review of soybean (fungicide) seed treatment was written in
Missour ICPM newsletter by Laura Sweets,
see the article at this URL:
Key comments by Dr. Sweets include:
Soybean seed treatment fungicides are recommended if there is a
concern about seed-borne diseases, if the field has a history of a
specific early-season soybean disease, or conditions at planting are
not favorable for rapid germination and emergence thus favoring
early-season soybean diseases. Soybean seed treatment fungicides
will not improve the germination of seed that has a poor germination
rate because of physical cracks in the seed coat, weathering during
the seed production year and other physiological factors
stewardship meetings for
crop and livestock producers will explain how the Phosphorus Index
water quality and air quality issues will affect local producers.
The meetings will be March 17 in Spencer, March 24 in Sheldon, April
5 in Whittemore and April 6 in Carroll from 9:30 a.m. to 3:30 p.m.
For more information and to register, contact your local extension