PDC Fact Sheet Fungicides Labeled for Use on Ornamental Trees and Shrubs

Fungicides are often useful in the management of plant diseases when used properly. The following is helpful to keep in mind when considering the use of a fungicide:

• Know what disease you are targeting as proper identification can help with timing the application of fungicide to achieve maximum control.

• Many of these fungicides work as protectants, therefore the fungicide must be in place before the pathogen arrives.

• Often doing nothing is as effective as spraying at the wrong time, obtaining poor coverage, or using a fungicide that is not appropriate to the disease.

• Although a chemical may be labeled for a particular disease it may not be labeled for the plant use or site use. Therefore it is extremely important to consult the label for exact use. Always read and follow directions.

Active ingredients and trade names of materials useful for controlling common diseases of ornamental trees and shrubs. Always consult the pesticide label for appropriate use for disease and host suitability.

Disease	Active Ingredient	Examples of Trade Names	Remarks
Bacterial diseases	Bordeaux mixture	Bordeaux Mixture (various manufacturers)	Some fungicides containing copper may cause plant injury. Damage is most likely to occur in cool, humid weather.
	fixed coppers	Kocide, Phyton 27 Homeowner: many trade names
	quarternary ammonium compounds		For greenhouse and plant propagation areas.
Leaf-spotting fungi	azoxystrobin	Heritage	Certain varieties of apple, cherry and crabapples are susceptible to injury by sprays. See label for details.
	Bordeaux mixture	Bordeaux Mixture (various manufacturers)	Some fungicides containing copper may cause plant injury. Damage is most likely to occur in cool, humid weather.
	captan	Captan
	chlorothalonil	Bravo, Daconil, Manicure, Thalonil Homeowner: many trade name including Daconil
	fenarimol	Rubigan	commercial use only
	fixed coppers	Kocide, Phyton 27 Homeowner: many trade names	Some fungicides containing copper may cause plant injury. Damage is most likely to occur in cool, humid weather.
	iprodione	Chipco 26019	commercial use only
	maneb	Pentathlon	Not intended for use on fruit trees by homeowners. Do not use treated plants for food or feed.
	mancozeb	Mancozeb, Dithane, Protect Homeowner: many trade names including Mancozeb	Not intended for use on fruit trees by homeowners. Do not use treated plants for food or feed.
	mancozeb + copper hydroxide	Junction	Not intended for use on fruit trees by homeowners. Do not use treated plants for food or feed.
	myclobutani	Eagle, Systhane Homeowner: Immunox
	propiconizole	Banner Maxx
	quaternary ammonium compounds	Physan 20 and Triathlon	For greenhouse and plant propagation areas.
	Thiophanate-methy	Cleary's 3336, Fungo 50 Homeowner: GreenLight Systemic Fungicide, Fertilome Halt
	triforine	funginex
Powdery mildew	fenarimol	Rubigan	Commerical use only.
	lime sulfur or calcium polysulfide	many trade names	Sulfur and lime sulfur may cause plant injury. Do not apply sulfur or lime sulfur when temperature exceeds 80 degrees F. Spray in morning to prevent burning.
	myclobutanil	Eagle, Systhane Homeowner: Immunox
	thiophanate-methyl	Cleary's 3336, Fungo 50 Homeowner: GreenLight Systemic Fungicide, Fertilome Halt
	triadimefon	Bayleton, StrikeHomeowner: Bayleton. GreenLight Fung Away
	triforine	Funginex
	wettable sulfur	many trade names	Sulfur and lime sulfur may cause plant injury. Do not apply sulfur or lime sulfur when temperature exceeds 80 degrees F. Spray in morning to prevent burning.
	ziram	ziram
Root and crown diseases caused by Phytophthora	etridiazole	Truban, Terrazole	For use on some container, bed-grown wood ornamental plants.
	fosetyl-Al	Aliette, Prodigy	Use for collar and root rot on non-bearing pome fruits. Use according to label on other woody ornamentals.
	mefenoxam	Subdue Maxx, Quell	Use as soil drench according to label instructions for several woody ornamentals. Special precautions for azaleas to prevent plant injury. See label for details.
	Propamocarb hydrochloride	Banol
Rusts	chlorothalonil	Bravo, Daconil, Manicure, Thalonil Homeowner: many trade name including Daconil
	lime sulfur or calcium polysulfide	many trade names	Sulfur and lime sulfur may cause plant injury. Do not apply sulfur or lime sulfur when temperature exceeds 80 degrees F. Spray in morning to prevent burning.
	myclobutanil	Eagle, Systhane Homeowner: Immunox
	quaternary ammonium compounds	Triathlon, Physan 20	For greenhouse and plant propagation areas.
	thiophanate-methyl	Cleary's 3336, Fungo 50 Homeowner: GreenLight Systemic Fungicide, Fertilome Halt
	triadimefon	Bayleton, Strike Homeowner: Bayleton. GreenLight Fung Away
	triforine	Funginex
	wettable sulfur	many trade names	Sulfur and lime sulfur may cause plant injury. Do not apply sulfur or lime sulfur when temperature exceeds 80 degrees F. Spray in morning to prevent burning.
University Outreach and Extension does not endorse commercial products. Follow the label on all pesticides.

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	Email: plantclinic@missouri.edu