Foliar applied fungicides:
Effect on soybean disease, soybean yield and interaction with insecticides.
Bruce Potter, University
of Minnesota Department of Entomology
and Southwest Research and Outreach
Center
Jim Kurle, University of Minnesota Department
of Plant Pathology, St. Paul,
MN.
Summary
In a trial conducted at the University
of Minnesota Southwest research
and Outreach Center,
Lamberton, MN,
Headline fungicide was applied at three rates at V5, at two rates at R2 and at one rate at V5 and R2. At
R4, Headline, Quadris Tilt ad Bravo were applied at a single
rate each. Additionally at R4 Warrior was applied alone and in combination
with Headline and Quadris, Lorsban
was applied with Headline and Quadris and Mustang
Max was applied with headline. Differences in soybean lower leaf loss and
to a lesser extent brown stem rot were observed.
With the exception of Mustang Max, treatments with an insecticide had less
aphids than those without. These treatment differences did not translate into
yield as all treatments yielded equivalently. Differences in soybean growth
were not observed. Although other diseases were present in
the trial, treatment differences were not observed.
With the exception of a brief yellowing in some Bravo treated plots, crop
injury was not observed for any of the treatments.
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Created 12/16/04
by B. Potter with assistance from M.
Werner.
