Volume
6 Issue
3
June 9, 2009
"Understanding Noxious Weed Control in Pastures, CRP,
Roadsides & Gravel Source Areas"
June 18, 2009
Plot Tour at 8:30 AM —- 10:00 AM - 12:30 PM
The control of perennial noxious weeds can often be troublesome for
farmers, CRP landowners, county and township road/weed department
officials, and other land managers.
NDSU Tile
Drainage Bus Tour
Tuesday,
June 16
Depart at 8:30 AM from Fargodome
North Dakota State University, in cooperation with the North Dakota
Water Education Foundation, will hold a tile drainage tour of the
Red River Valley on Tuesday, June 16. The
bus for the tour will load in the west lot of the Fargodome.
2009 U of M
Field School for Ag Professionals
Online
Registration
is Now Open
July 15 – 16
Northwest
Research and Outreach Center-Crookston, MN
Orange Wheat Blossom Midge:
Vigilance is in order
Orange wheat blossom midge as a wheat pest has been off the front
page as a major production problem in NW MN for many years. However,
we learned in the mid-90’s that this insect can increase its
population rapidly.
Soybean
Planting Date and Delayed Planting
We are into the fourth year of a soybean date planting trial at
Crookston investigating how two different relative maturity soybean
varieties respond to planting date. Results for 2006 - 2008 show
maximum soybean yield when planting in the May 1 – 15 window of
opportunity.
Insurance insecticide treatments for soybean aphids:
Why we are concerned about this management strategy.
Everyone dreads another pesticide trip across the field. You may be
planning or have been encouraged to apply an insecticide with an
upcoming glyphosate application, without regard for aphid
populations in the field. While this strategy may occasionally work
out, there are several potential problems that can arise from this
strategy.
Volunteer
Corn Management in Corn and Soybean
Large populations of volunteer corn are being or will be reported in
some fields in Minnesota this year. What impact the volunteer corn
will have on this year’s crop yield and the viable management
options available will depend upon in which crop the volunteer corn
is present.
Temperatures Affect Glyphosate Activity
Temperatures over the last month have fluctuated greatly. Cold
temperatures two weeks ago caused a reduction in glyphosate
activity. Individual plants of lambsquarters and annual smartweed
species where not completely controlled at a research location while
other plants and other species were completely controlled. Cold
weather in early June of 2008 also caused a reduction in glyphosate
activity.
Timing the
First Glyphosate Application in Roundup Ready Sugarbeet
Glyphosate should be applied to Roundup Ready sugarbeet when weeds
reach 1 to 2 inches in height and before sugarbeet reaches the 4- to
6-leaf stage of development. Weed competition and subsequent yield
loss is likely to occur if glyphosate is applied beyond this time
period except for sparse weed populations.
Maximizing
Glyphosate Activity in Glyphosate-Resistant Crops
The goal of all growers should be to maximize glyphosate activity
whenever it is applied to glyphosate-resistant crops. This goal
should maximize profitability and weed control and reduce the risk
for herbicide resistance. We offer the
most important management strategies for improving glyphosate
activity.
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