2020 Harrells Balanced Approach Customer Agronomic Program …

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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