Fungicide pH Guidelines
Half-Life at Various pH Levels
Optimum pH
Needs Buffer
Pesticide Brand Name
Generic Product Name
Alkaline
Neutral
Acidic
9.0
8.0
7.0
6.0
5.0
26/36 Fungicide BANNER MAXX®
No NO NO NO YES NO NO NO YES NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO
Stable over wide pH range for 12 hours
PROPICONAZOLE PROPAMOCARB
Stable pH 5.0 - 9.0
BANOL®
Stable over wide pH range Stable over wide pH range
BAYLETON®
TRIADIMEFON
7 5
BENLATE CAPTAN
BENOMYL
1 hr
7 hr
80 hr
CAPTAN
5.0 - 7.0
CHIPCO GT®
IPRODIONE FOSETYL-AL
7 6
Rapid hydrolysis at pH above 8.0
CHIPCO® SIGNATURE™
Stable at pH 4.0 to 8.0
CLEARY 3336™ COMPASS™ CuPro 5000 Curalan EG DACONIL® DITHANE WF EAGLE WSP EMERALD® ENDORSE™
THIOPHANATE-METHYL TRIFLOXYSTROBIN COPPER HYDROXIDE
6.0–7.0
Buffer to a pH of 6.0 to 7.0 prior to addition of 3336
Stable over wide pH range
> 6.5
Spray solution having pH of less than 6.5 may result in phyto
VINCLOZOLIN
CHLOROTHALONIL
7 7
Stable over wide pH range Optimum pH range 5.5 - 6.0 Stable over wide pH range Stable over wide pH range Stable over wide pH range Optimum pH range 5.5 - 6.0 Stable for up to 18 hours Stable over wide pH range
MANCOZEB
MYCLOBUTANIL
BOSCALID
POLYOXIN D & MANCOZEB
FORE SC RAINSHIELD
MANCOZEB
7
HEADWAY HERITAGE®
AZOXYSTROBIN/PROPICONAZOLE
AZOXYSTROBIN
HONOR
PYRACLOSTROBIN/BOSCALID
INSIGNIA® INSTRATA INTERFACE
PYRACLOSTROBIN
Stable over wide pH range
CHLOROTHALONIL/PROPICONAZOLE
IPRODIONE/TRIFLOXYSTROBIN
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