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Some selected fungicides for use on herbs

Fungicide

Use

Site

 

Targeted Pest

Labeled Crops

Comments

Bacillus subtilis

(Cease)

4 hr. REI

Group NC

Organic product  

G

 

 

 Suppression of Rhizoctonia, Pythium, Fusarium and Phytophthora

Alternaria leaf blight, Anthracnose, and bacterial blight

Herbs and spices

Preventative broad spectrum biological fungicide. For maximum effectiveness, apply prior to or in the early stages of disease development. Applied as foliar spray or drench.  Begin applications when environmental conditions are favorable for disease development.

Bacillus subtilis

(Companion Liquid Biological Fungicide)

4 hr. REI

Group NC

Organic product

G, O

Crown Rot, Damping Off Fungus, Botrytis Blight, Root Rots (Pythium)

Herbs and spices

Preventive biological fungicide. Activates ISR (induced systemic resistance)

 

Copper sulfate pentahydrate

( Phyton 35)

48 hr. REI

Group M1  

 

G, O

Chives:   Bacterial soft rot, downy mildew, botrytis

Coriander, mint and Rosemary:   Botrytis and Powdery Mildew

Dill: Leaf spots

Parsley:  Leaf scorch, leaf spots

Herbs such as chives, coriander, mint, rosemary and dill

Systemic bactericide and fungicide that provides systemic, preventive and curative activity

Cyazofamid

(Ranman)

12 hr. REI

Group 21

G, O

Downy mildew on basil

Basil

Locally systemic fungicide.  Apply as a drench.

Fenhexamid

(Decree 50 WDG)

12 hr. REI

Group 17

 

G

Botrytis

Cilantro, chervil, parsley

Works by contact. Begin applications when conditions favor disease development. Follow resistance management guidelines on label.

Horticultural Oil

Paraffinic Oil

(Ultra-Pure Oil)

4 hr. REI

Group NC

G, O

Powdery mildew

Herbs and spices

Application should be made when the disease is first noticed. Acts by contact.  Due to varietal differences, conduct a small-scale test spray first. Greenhouse applications should be at lower rates stated on the label.

Hydrogen dioxide  &

peroxyacetic acid

(OxiDate 2.0)

0 hr. REI

1 hr. REI (spray)

Group NC

Organic product

G, O

Anthracnose, downy mildew, powdery mildew and Pythium root rot

Herbs and spices

 

 

 

 

Contact, oxidizing sanitizer. Strong oxidizing agent. Works by contact.

Mandipropamid

(Micora)

4 hr. REI

Group 40

G

Downy Mildew

Chervil, parsley

For use in enclosed greenhouses with permanent flooring for resale to consumers.  Begin applications prior to disease development.  See label for specific use instructions.

Phosphorous Acid

(Fosphite)

4 hr. REI

Group 33

G, O

Phytophthora, Pythium, Fusarium, Rhizoctonia

 

Downy Mildew,

Powdery Mildew

Herbs and spices

Make applications prior to disease development in conjunction with good cultural management practices.  Do not apply to plants that are dormant or heat or moisture stressed. 

Phosphorus Acid

(Alude)

4 hr. REI

Group 33

G, O

Downy Mildew

Parsley, chervil

Ensure spray coverage is adequate to wet the whole plant.

Phosphorous Acid and

Hydrogen peroxide

(OxiPhos)

4 hr. REI

O hr. REI (soil drench)

Group 33 and Group NC

G, O

Downy Mildew, Pythium Root Rot

Herbs and spices

See label for plant safety precautions.

Potassium bicarbonate

(Milstop)

1 hr. REI

Group NC

Organic product

(Armicarb O)

4 hr. REI

Organic product

G, O

Powdery mildew and others (see label)

Herbs (see labels for specific types)

Contact eradicant fungicide.  Thorough coverage essential.  Begin applications at first sign of disease and repeat as needed.

Streptomyces griseoviridis strain

K61

(Mycostop)

4 hr. REI

Organic product

G, O

Fusarium, Alternaria, Phomopsis, Botrytis, Pythium and Phytophthora that can cause seed, root and stem rot

Herbs

Preventative biological fungicide. Contains a beneficial bacterium. Repeat applications may be needed. Use as a soil spray or drench.

Streptomyces lydicus

(Actinovate SP)

1 hr. REI

Group NC

Organic product

G

Suppression of  soil borne fungi such as Fusarium, Rhizoctonia, Pythium, Phytophthora

Suppression of foliar diseases such as powdery mildew, Botrytis, Alternaria and others 

All food crops

Preventive biological fungicide that contains a beneficial bacterium that can be applied as a drench or spray. It may also increase plant size, vigor and root mass. Note storage conditions needed and expiration date on the package.

Streptomyces lydicus

(Actino-Iron)

4 hr. REI

Organic product

G

Root rot and damping off fungi such as Fusarium, Pythium, Rhizoctonia, Phytophthora,

All food crops

Preventive biological fungicide that contains a beneficial bacterium with iron and humic acid.

Trichoderma harzianium

(PlantShield HC)

0 hr. REI (soil application)

Group  NC

Organic product

 

(RootShield Granules)

(RootShield WP)

0 hr. REI

NC

Organic product

 

G, O

 

 

 

 

 

 

Pythium, Rhizoctonia  Fusarium, Cylindrocladium, and Thielaviopsis

 

 

 

 

Herbs, spices and mints – soil applications only

Preventative biological fungicide for use in soil applications. Contains a beneficial fungus. Acts as a preventative and will not cure diseased plants.  Becomes active when soil temperatures are above 50 °F. Greenhouse foliar applications are for non-food crops only.

 

Granules for use in greenhouse planting mix,

WP as a soil drench

Trichoderma harzianum and Trichoderma virens

(Root shield Plus+ Granules)

No REI

(RootShield Plus+ WP)  

4 hr. REI

Organic Product

G

Pythium, Phytophtora, Rhizoctonia, Fusarium,

Cylindrocladium,

Thielaviopsis.

 

Herbs and spices

Preventative biological fungicide.  Becomes active when hold temperatures are above 50 F.

WP: No overhead spray.

*G= Greenhouse, ** O= Outdoors, Group NC Not classified*

Fungicides are grouped by their mode of action (MoA) and each MoA group is assigned a Fungicide Resistance Action Committee (FRAC) code.   Most systemic fungicides (that are absorbed into plant tissues) are specific in their mode of action. Protectant fungicides are less likely to develop resistance problems as they have multi-site modes of action (M). To prevent the development of resistance, alternative applications among difference FRAC codes and incorporation preventative biological fungicides and cultural controls into your management plan.   See www.frac.info/frac/indes.htm

This information is supplied here with the understanding that no discrimination is intended and no endorsement supplied. Due to constantly changing regulations, we assume no liability for suggestions.

 

Growers should always read and follow label instructions. Always follow label instructions regarding registered uses and note cautions. To avoid any phytotoxicity problems, spot test first before widespread use.

 

Organic Materials Review Institute (www.omri.org) is a non-profit organization whose mission is to publish information on lists of materials allowed for organic food production. Final decisions regarding organic use production reside with the USDA.

 

by L. Pundt (University of Connecticut) and T. Smith (University of Massachusetts).   2005. Updated 2013

 

The information in this document is for educational purposes only.  The recommendations contained are based on the best available knowledge at the time of publication.  Any reference to commercial products, trade or brand names is for information only, and no endorsement or approval is intended. The Cooperative Extension System does not guarantee or warrant the standard of any product referenced or imply approval of the product to the exclusion of others which also may be available.  The University of Connecticut, Cooperative Extension System, College of Agriculture and Natural Resources is an equal opportunity program provider and employer.



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