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Curb appeal is everything. Whether you are trying to sell your house or you want to impress the neighbors, nothing beats a fine lawn. However aside from weeds and lawn pests there are also fungus and disease that a landscaper has to worry about. One fairly common fungal issue that creeps up all too often is brown patch. This can be a frustrating lawn disease because it sticks out like a sore thumb and if nothing is done about it, it start to spread like crazy. Luckily there are fungicides which can deal with issues such as these like propiconazole. 

On this page we will touch on some background information on propiconazole, a popular active ingredient in a number of different fungicide products we carry. We will cover its origin and why it works so well to eliminate fungi and disease. Here you can also shop the fungicide products we have in stock are based with propiconazole. 

What Is Propiconazole?

Propiconazole is a triazole fungicide. This triazole fungicide also goes by the name DMI (demethylation inhibiting fungicide). The active ingredient of propiconazole is systemic and is used in a number of different popular fungicide products on the market to control fungi, bacteria, and viruses affecting plants.

Propiconazole was first developed in 1979 by Belgian company Janssen Pharmaceuticals. It was then registered to the EPA in 1981 for use to protect seed grass but later the EPA expanded its use to include food crops. Propiconazole in its physical form is a odorless, yellowish clear powder. It comes in a variety of different formulations such as emulsifiable concentrate, flowable concentrate, ready-to-use liquid, liquid soluble concentrate, wettable powder, and dust.

How Propiconazole Works

Because propiconazole is a DMI, this means that its mode of action is stopping fungal growth by demethylation of C-14( removal of a methyl group (CH3) from a molecule) during ergosterol biosynthesis that leads to an accumulation of C-14 methyl sterols. 

In other words, propiconazole affects the cell walls of the fungi which slows or stops the fungal growth. Products using propiconazole interfere with the synthesis of ergosterol in plant life, ergosterol being a molecule essential to the formation of fungus. As a result, the formation of fungus is slowed and eventually stopped.

Because of this unique mode of action some people call consider propiconazole to be fungistatic or growth inhibiting rather than fungicidal or fungus killing.

View our selection of fungicide products which contain propiconazole below. For more information about propicanazole or other fungicide active ingredients, please call us with your questions at 800-479-6583 or email us at askapro@solutionsstores.com.

How is Propiconazole Used?

Propiconazole is used to protect ornamental plants and turf from a variety of different fungal diseases such as brown patch, mold and other common lawn disease issues. Propiconazole based products have been also used on golf courses and sod farms. It may be used as a preservative to wood, adhesives, paints, coatings, leather, paper, textiles, and other industrial products


Propiconazole is registered for use on a variety of food crops, most notably banana, nuts, barley, corn, stone fruits, wheat, cereal grains, citrus, oats, rice, rye, sugarcane, and wheat. Nuts, rice, and wheat account for the heaviest usage.


Is Propiconazole Safe To Use?

Propiconizole has a moderately low acute toxicity. The acute oral LD50 for rats is 1517 mg/kg. When exposed to the eyes, popiconazole caused corneal opacity which reversed within 72 hours


Propiconazole can contaminate water and may be highly toxic to fish. Exercise extreme caution if using near water sources. Propiconazole degrades into triazole compounds, which may still be toxic. Decomposition of propiconazole by heating may release toxic gasses.


Eye contact with propiconazole may cause moderate irritation. When applying propiconazole we recommend carefully following safety procedures found on the instruction label and wearing the proper protective equipment (long sleeve clothing, gloves, breathing mask and protective eyewear).

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