careful you don't make a mistake
in your calculations. The label
will usually provide a range of
application rates that pertain to
using the product preventively
or curatively.
"Fungicides can be used on
a preventive basis – usually at
lower rates and/or at longer
intervals between applica-
tions – when disease outbreak
has not yet occurred but when
weather favorable for disease
is expected," says Paul Vincelli,
Ph.D., extension professor, plant
pathology, the University of
Kentucky.
"Conversely, fungicides may
be used on a curative basis –
often at higher rates and/or at
shorter intervals – after an out-
break has occurred and disease
pressure is high," he says.
Cultural control
The best way to deal with turf
disease is to discourage it by
promoting good cultural practic-
es that result in dense, vigorous
turf. Making sure grass is not
mowed too short, irrigation is
on target and water is draining
properly, fertilizer is moderated
and thatch is eliminated will
promote a healthy turf.
"If a disease does break out,
keep in mind a return to weath-
er favorable for turf growth and
vigor will help alleviate the
problem," Vincelli says.
Often, a lawn will recover
from disease on its own if you've
been promoting turf health.
A P R I L 2 014 To t a l L a n d s c a p e C a r e . c o m 4 5
chemical care
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IN ITS 30TH ANNIVERSARY YEAR,
Vista's well-established way of doing business
continues to empower success.
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vistapro.com/landscape
Text
INFO
to
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or
visit
TLC
request.com
Gray leaf spot threatens turf in wet and
humid conditions, especially young perennial
ryegrass and tall fescue.
NED
TISSERAT,
COLORADO
STATE
UNIVERSITY,
BUGWOOD.ORG
