2012
Impact of nitrogen on soybean aphid density and parasitization
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Contributor/Checkoff:
North Dakota Soybean Council
Category:
Sustainable Production
Keywords:
NematodePest
Parent Project:
Impact of nitrogen on soybean aphid density and parasitization by Binodoxys communis
Lead Principal Investigator:
Deirdre Prischmann-Voldseth, North Dakota State University
Co-Principal Investigators:
R Jay Goos, North Dakota State University
Project Code:
Contributing Organization (Checkoff):
North Dakota Soybean Council
(n/a)
Institution Funded:
North Dakota State University
(n/a)
Brief Project Summary:

The long-term goal of this continuing project is to develop improved pest management techniques for invasive soybean aphids in North Dakota. The special goal for this study is to investigate how soil nitrogen and nitrogen-fixation impacts pest density and control by the parasitoid Binodoxys communis.

Unique Keywords:
#nematodes
Information And Results
Project Deliverables

Weeds can be effectively controlled with Liberty in LL soybean according to data. Glyphosate applied alone and in tank-mixture with other post emergence herbicides will not control all glyphosate-resistant plants within a RR soybean field and increases the selection of multiple resistant biotypes. The use of soil applied herbicides improved weed control and delayed the initial post emergence application in both RR and LL soybean. Cadet mixed with glyphosate reduced control of common ragweed and did not improve control of waterhemp (specific data not provided).

LibertyLink soybean yielded more and provided greater profits compared to RR soybean at the Mayville site, however RR soybean out-yielded and provided greater profits at the Holloway site (data not provided). Therefore choose LL soybean varieties carefully to maximize yield.

The greater the frequency and level of resistance to glyphosate within a field, the greater the need to plant LL soybean. When Liberty is applied following a soil-applied herbicide to small (< 3 inches) weeds at high spray volumes (> 17 GPA), with high pressures and small spray droplets effective weed control can be obtained.

Final Project Results

~ Weeds can be effectively controlled with Liberty in LL Soybean.
~ Glyphosate applied alone and in tank mixes will not control all resistant weeds and increases the selection of multiple-resistant biotypes.
~ The use of soil-applied herbicides improved weed control.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.