Weather and Turf Disease –Early Spring 2013
Nobody needs to be reminded that March 2013 has
been colder than the last several years.
The good thing is that wintry conditions prevent wasted fungicide
applications. Keep watching the summer
patch soil temperature monitor. Remember
that there are several elements to the decision rule. The cardinal temperature seems to be around
65F—in soil at 2” depth. Also understand
that the pathogen does not emerge from dormancy like an “on/off” light
switch. It is more like a dimmer switch,
which reinforces the notion of waiting until the natural warming period
prevails, rather than hastily making an application in response to an unnatural
spike in soil temperature.
I doubt that anyone has had the opportunity to apply
early season sprays for dollar spot control.
Results from our research over the past 3 seasons indicate that
fungicide sprays would surely be wasted if applied over the past 4 weeks.
Combination Fungicide Products – 2013
There is a trend among basic manufacturers to
combine active ingredients to improve efficacy and broaden the spectrum of
activity of treatments for turf disease control. Below is a list of fungicide combinations
that may serve as a resource for identifying the active ingredients in new
fungicide products.
Product Name
|
#
|
Active ingredients
|
Equivalent products
|
Headway
|
2
|
azoxystobin + propiconazole
|
Heritage + Banner
|
Briskway
|
2
|
azoxystrobin +
difenconazole
|
Heritage + difenconazole
|
Concert
|
2
|
propriconazole +
chlorothalonil
|
Banner + Daconil
|
Instrata
|
3
|
propiconazole + ctl +
fludioxanil
|
Banner + Dac + Medallion
|
Renown
|
2
|
azoxystrobin +
chlorothalonil
|
Heritage + Daconil
|
Tartan
|
2
|
trifloxystrobin +
triadimefon
|
Compass + Bayleton
|
Reserve
|
2
|
triticonazole +
chlorothalonil
|
Triton + Daconil
|
Interface
|
2
|
trifloxystrobin + iprodione
|
Compass + 26GT
|
Honor
|
2
|
pyraclostrobin + boscalid
|
Insignia + Emerald
|
Encartis
|
2
|
boscaild + chlorothalonil
|
Emerald + Daconil
|
Pillar G
|
2
|
triticonazole +
pyraclostrobin
|
Trinity + Insignia
|
26/36
|
2
|
Iprodione +
thiophanate-methyl
|
26GT + Cleary 3336
|
Twosome
|
2
|
iprodione +
thiophanate-methyl
|
26GT + Cleary 3336
|
Stellar
|
2
|
fluopicolide + propamocarb
|
Fluopicolide + Banol
|
Disarm M
|
2
|
fluoxastrobin +
myclobutanil
|
Disarm + Eagle
|
Disarm C
|
2
|
fluoxastrobin +
chlorothalonil
|
Disarm + Daconil
|
Dac-Action
|
2
|
chlorothalonil +
acibenzolar
|
Daconil + acibenzolar
|
Junction
|
2
|
mancozeb + copper hydroxide
|
Fore + copper hydroxide
|
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