Myclobutanil is a FRAC Group 3 systemic DMI (demethylation inhibitors, also called sterol biosynthesis inhibitors) fungicide that belongs to the class of triazole compounds. It is primarily used in agricultural practices to manage various fungal diseases affecting crops and soil, as well as in residential settings for maintaining turfgrass and gardens.
Types of Funguses Controlled with Myclobutanil
Myclobutanil fungicide is effective in controlling a wide range of fungal diseases, including but not limited to the following:
- Powdery mildew
- Rust diseases
- Leaf spot diseases
- Anthracnose
- Blight
- Scab
- Downy mildew
- Alternaria
- Botrytis
- Fusarium
- Take all Root Rot (TARR) and Take all Patch (TAP)
These are just a few examples of the many fungal diseases that Myclobutanil fungicide can effectively control in various crops such as fruits, vegetables, ornamentals, and lawns.
Myclobutanil Fungicide Product Brand Names
- Eagle 20EW Specialty Fungicide Liquid
- Ferti-Lome F Stop Lawn Fungicide Granules
- Howard Johnsons Eagle 0.39% Specialty Fungicide Granules
- Myclobutanil 20EW T&O Fungicide Liquid
- Ferti-lome F Stop Lawn and Garden Fungicide Liquid Concentrate
- Eagle Fungicide Granules
Resistance Concerns for Consecutive Uses of Myclobutanil
Answer: High.
List of Other FRAC Class 3 DMI Fungicides
There are several other FRAC class 3 fungicides, with the same mode of action. Most on this list are only available for commercial use and golf course use, not residential lawn use.
- Fenarimol
- Triademefon
- Propiconazole
- Triticonazole
- Metconazole
- Tebuconazole
Texas Grass Varieties Labeled for Myclobutanil Fungicides
Myclobutanil is considered safe to use on several types of grass commonly found in Texas. Here are some of the grasses that can be treated with myclobutanil fungicides:
- Bermudagrass - This is one of the most popular warm-season grasses in Texas, known for its durability and ability to withstand heat.
- Zoysiagrass - This grass is also popular in Texas for lawns and golf courses due to its tolerance to heat and foot traffic.
- Tall Fescue - Although primarily a cool-season grass, tall fescue can be used in transitional zones in Texas. Myclobutanil can help manage diseases that affect it.
- Buffalograss - A native grass that is drought-tolerant, buffalograss is used in many residential lawns in Texas. Myclobutanil can be applied to control fungus diseases affecting its health.
- Kentucky Bluegrass - While less common in the south, it is occasionally grown in certain areas, particularly in the Texas Panhandle. Myclobutanil is effective for controlling diseases in this type as well.
- St. Augustine - This grass is widely grown through the south.
Always ensure you follow the product label instructions for proper application rates and timing when using myclobutanil on any type of grass to ensure effectiveness and safety.
History of Myclobutanil
Discovery and Development -
Myclobutanil was first developed and tested in the late 1970s. The compound was developed in response to the growing need for effective fungicides that could target a broad spectrum of fungal pathogens while minimizing environmental impact compared to older chemical alternatives. The initial research focused on its application against diseases in key crops such as cereals, fruits, and ornamental plants.
Mechanism of Action -
Myclobutanil works by inhibiting the biosynthesis of ergosterol, a vital component of fungal cell membranes. This disruption of membrane integrity leads to cell lysis and, ultimately, fungal death. Its systemic nature allows the chemical to be absorbed and translocated throughout the plant, providing comprehensive protection.
Regulatory Approval -
Following its development, myclobutanil underwent extensive testing to evaluate its efficacy and safety for both crops and the environment. In the United States, the Environmental Protection Agency (EPA) reviewed the compound in the early 1990s before granting it registration for agricultural use. Other countries followed suit, conducting similar assessments to ensure the safe use of myclobutanil in agriculture.
Commercial Use and Popularity -
Myclobutanil gained popularity in the agricultural sector throughout the 1990s and early 2000s, mainly due to its effectiveness against various fungal diseases and soil diseases, including root rots, powdery mildew, rusts, and leaf spots. It became a preferred choice among farmers for its broad-spectrum capabilities and relatively low toxicity to non-target organisms.
In addition to its agricultural applications, myclobutanil has been used in the turf and ornamental industry to manage diseases in lawns and ornamental plants. Its formulation in both liquid and granular forms has made it versatile and easy to apply.
Ongoing Research and Development -
The ongoing evolution of agricultural practices, such as integrated pest management (IPM) strategies, has influenced the usage patterns of myclobutanil. Researchers continue to study the efficacy of myclobutanil in controlling newly emerging fungal pathogens and its effectiveness in combination with other fungicide classes to combat resistance issues.
Conclusion -
Myclobutanil has played a significant role in modern agriculture since its introduction in the late 20th century. Its effective control of diverse fungal diseases and acceptance among growers demonstrate its importance within the fungicide market. As environmental regulations tighten and the focus on sustainable practices intensifies, the future of myclobutanil will likely depend on balancing its efficacy with safety and environmental stewardship. Continued research will be essential in addressing both efficacy against resistant strains of fungi and minimizing adverse ecological impacts.