D24—Lancaster Farming, Saturday, May 28,1983
Herbicide impregnated fertilizer studied in no-till corn
NEWARK, DEL. -
mer University of
scientists will again
> HERBICIDE
. IMPREGNATED
| FERTILIZER FOR
WEED CONTROL IN
NOTILLAGE CORN
~ ’ UNIATOWSKI AND VI H HTCHEU.
-mMt • extension assistant and EXTENSION
y AGRONOMISt UMV OF DELAWARE
\
St •
ronorny associate,
holds plaque he won for outstanding poster-paper presen
tation at 83rd meeting of Northeast Weed Science Society at
Grossingers, N.Y. Research poster presents new data from
greenhouse and field tests at U. of D. Agricultural Experiment
Station on use of herbicide impregnated fertilizer for weed
control in no-till corn.
performance of herbicu
pregnated fertilizer for
control in no-till com.
This sum-
Delaware
study the
Extension associate Robert
Uniatowski and extension
agronomist William Mitchell say
greenhouse and field trials they
conducted last summer were very
promising where murialed potash
(KCI) and water were used as a
carrier for two herbicides: Lasso
and Sutan +. Normally Lasso is
applied pre-emergence and Sutan
+, preplant incorporated. When
impregnated on the fertilizer and
surface applied at planting, both
materials gave promising results.
le im
weed
“What we’re after is more ef
fective weed control, for no-till
com,” Uniatowski says. “We want
to find out whether there’s a place
for PPI herbicides in the no-till
situation. In covers that don’t need
a knockdown, this would mean
bih'J*'* rotßc
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only one trip across the field, if the
fertilizer and herbicide could go on
at the same time.”
When put on fertilizer granules,
the weed killers are able to travel
down to the soil and go to work,
rather than becoming tied up on
the cover.
In their study, Uniatowski and
Mitchell compared the per
formance of Sutan/Atrazine on
KCI, Lasso/Atrazme on KCI,
Lasso/Atrazine spray,
Sutan/Atrazine spray, plus an
untreated control. Each treatment
went on seven different surfaces—
bare ground, and one-, two- and
three-ton layers each of com
stubble and oat cover. Each
t*.
■Jft
Any Size
treatment was used with and
without irrigation.
Though not conclusive, the 1982
trials showed that—no matter how
applied—Lasso and Sutan + were
equally effective under irrigation.
As a spray, Sutan/Atrazine per
formed better on the two- to three
ton covers, while the
Lasso/Atrazine blend did better
when sprayed on bare ground or a
one-ton cover. However, the same
herbicides, when impregnated on
fertilizer and applied, were more
effecitve than either spray.
More work needs to be done
before recommendations can be
made, but Uniatowski says in-
(Turn to Page 025)
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