Four Star Culture Guide - 2019 - 106

Fungicide Rotation Guide
These are our primary fungicide rotations of chemicals used to treat the disease issues that may develop in Proven Winners® and
Proven Selections® crops.
BOTRYTIS
Category

Treatment

Rate per 100 gal. When

Main Target/Other Targets

Liner prevention

Daconil® foliar
(note some residue)

1.4 pts

Weekly

Botrytis (Powdery Mildew)

Stock prevention

Daconil® foliar, but not if
blooms or large buds are
present

1.4 pts

Depends

Botrytis (Powdery Mildew)

Has Botrytis, or at risk
(in Action plan)

1. Pageant ®

12 oz

0 - 14 days

Botrytis (Downy Mildew, Powdery Mildew, Alternaria
Leaf Spot, Anthracnose)

2. Spectro™ (residue an issue
if blooms or large buds are
present)

2 lbs

At 14 days

Botrytis (Fusarium, Powdery Mildew, Rhizoc, Anthrac)

3. Protect™

1 lb

At 21 days

Botrytis

4. Decree

1.5 lb

27 days

Botrytis (rated as one of the better controls for
Botrytis per Ann Chase)

5. Affirm™ WDG

.5 lb

35 days

Botrytis, Anthracnose, Downy Mildew, Powdery
Mildew, Rhizoctonia

Category

Treatment

Rate per 100 gal. When

Main Target/Other Targets

Action plan with Powdery
Mildew rotation

1. Cease

2.5 gal

0 - 14 days

PM (Anthrac, Phytop, Downy Mildew, Rhizoctonia,
Fusarium, Thielaviopsis)

2. Milstop®

5 lbs

At 21 days

PM (Anthrac, Botrytis, Downy Mildew)

3. Milstop

5 lbs

At 28 days

PM (Anthrac, Botrytis, Downy Mildew)

2 oz

At 35 days

PM (Anthrac, Phytop, Downy Mildew, Botrytis, Rhizoc)

1 lb

0 - 7 days

PM (Anthrac, Phytop, Downy, Botrytis, Rhizoc)

®

POWDERY MILDEW
®

®

4. Compass® O
Plants that show Powdery
Mildew symptoms

1. Protect T&O
™

4 - 16 oz

At 7 days

PM (Alternaria, Botrytis, Rhizoctonia, Rust, Scab)

3. Compass® O

2 oz

At 14 days

PM (Anthrac, Phytop, Downy, Rhizoc Fusarium,
Theilaviopsis)

4. Daconil®

1.4 pts

At 21 days

PM (Botrytis)

2. Terraguard SC

®

ROOT ROT
Category

Treatment

Rate per 100 gal. When

Plants in propagation -
Undiagnosed trouble

Medallion®

2 oz

0 and 7 days Phytophthora/Pythium, Rhizoctonia, Broad spectrum
control ** Do not use on Calibrachoa **

Plants moving from
propagation

OHP 6672™ / Truban®

16 oz + 8 oz

Once

Phytophthora/Pythium (OHP: Rhizoctonia, Botrytis,
Fusarium) per action plans

Problem ID'd:
Phytopathogen or Pythium

1. Fenstop ® drench

14 oz

0 - 21 days

Phytophthora/Pythium (Rhizoctonia)

2. Banrot drench

4 oz

At 21 days

Phytophthora/Pythium (Downy Mildew) two modes of
action (MOAs), very effective control

3. Alude™ drench

12 oz

At 35 days

Phytophthora/Pythium

1. Cease

8 qts

7 - 14 days

Phytop/Pythium (biweekly on ColorChoice® shrubs)

Preventative drench

®

®

Main Target/Other Targets

Four Star Greenhouse I www.pwfourstar.com I 734-654-6420
106

The rates and chemicals listed are based on our southeast Michigan growing conditions, and are not recommended for nationwide application.
Please adjust the rates and spray applications to your location and facility.
http://www.pwfourstar.com
Four Star Culture Guide - 2019

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