Propiconazole

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 diseases that a landscaper has to worry about. Frustrating lawn diseases like brown patches can be unsightly, and if nothing is done about them, they can start to spread. This is where a powerful fungicide active ingredient like Propiconazole comes in handy.

On this page, we will touch on some background information on propiconazole, a popular active ingredient featured in some of our top-recommended fungicides. We will cover its origin and why it works so well to eliminate fungi and disease. Here, you can also shop the top-recommended fungicide products we have that contain Propiconazole.

What is Propiconazole?

Propiconazole, first registered by the US EPA in 1981, is a triazole fungicide used to control lawn diseases and fungi. It is a systemic fungicide, so it will be absorbed into treated plants to prevent diseases and treat ongoing infections. Propiconazole is used in several popular fungicide products to control fungi, bacteria, and viruses affecting plants.

Propiconazole is an odorless, yellowish-clear powder in its physical form. It is available in various formulations, such as emulsifiable concentrate, flowable concentrate, ready-to-use liquid, liquid-soluble concentrate, wettable powder, and dust.

How Does Propiconazole Work?

Mode of Action

Propiconazole affects the cell walls of fungi, slowing down or stopping 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, Propiconazole is considered fungistatic or growth-inhibiting rather than fungicidal or fungus-killing.

After application, propiconazole is absorbed into treated plants and works to fight or prevent disease for up to 30 days. 

Benefits of Propiconazole

Propiconazole is versatile. It can be used as a curative or preventative against lawn diseases. It works systemically, absorbing into the target plant to protect it against diseases, prevent further spread, or, depending on the severity level, eliminate the disease entirely.

Use Propiconazole outdoors on turf and ornamental plants to control many different species of fungi and diseases such as Brown Patch, Gray Leaf Spot, and Powdery Mildew.

Drawbacks of Propiconazole

Propiconazole is helpful against diseases, but only at the proper rates. If too many active ingredients are absorbed into the plant, it can cause phytotoxicity, poisoning the plant. Some plants are sensitive to the active ingredient, so read the label before applying.

Do not use propiconazole in greenhouses or apply directly to water or on top of snow. You should also not apply the active ingredient to African violets, begonias, Boston ferns, geraniums, or fruit trees. Also, do not apply more than 16 oz. of Propiconazole per 1000 sq. ft. per calendar year to a treatment area.

Is Propiconazole Safe?

Propiconazole is safe to apply according to label directions. Wear the proper safety gear and equipment when handling this product; you have nothing to worry about when applying it to your lawns.

How to Use Propiconazole

If you are looking for a powerful fungicide to treat or prevent lawn diseases and fungi, we recommend using a product like Patch Pro. Patch Pro is a systemic fungicide concentrate made with 14.3% propiconazole. It's best to use products like Patch Pro before the disease has established itself, but you can also use them to treat active infections.

Depending on the disease you are treating, you will mix 0.5 to 4 ounces of Patch Pro in 1 gallon of water to treat 1,000 square feet. For most general prevention treatments, we recommend using 1 ounce of Patch Pro per 1,000 square feet. Be sure to read the label to get the exact amount you need. Propiconazole must be applied at the proper labeled rates to treat or prevent diseases. If not mixed properly, it may cause phytotoxicity, poisoning affected plants.

Once your solution is mixed, apply it over affected areas, broadcast it over your lawn, or spray it over your ornamental shrubbery and foliage. Be sure to spray underneath the leaves as well. When dealing with an active lawn disease, we recommend you make a follow-up application 14 to 21 days after your initial application. You should see a noticeable plant health improvement after 2 weeks. When Patch Pro is used to prevent diseases and fungi, it will absorb into treated plants and protect them for up to 30 days.

What To Expect

Propiconazole has a residual effect of up to 30 days after application. Spray monthly for preventative control of listed diseases, but do not apply more than 16 oz. per 1000 sq. ft. per calendar year. Depending on the targeted disease, your plant's health should improve in one to three weeks. Read the label and reapply to keep the area healthy and disease-free.

Afterward, water is recommended in Propiconazole product applications to help the active ingredient penetrate the plant's root system, which needs treatment for the best results.

Featured Products

Patch Pro Fungicide—Patch Pro Fungicide is a systemic fungicide containing the active ingredient propiconazole. It is designed to get rid of a broad spectrum of harmful and unsightly diseases on plants and lawns. Patch Pro controls many fungi and diseases, such as brown patch, powdery mildew, and blight.