Metalaxyl

Metalaxyl is a systemic, benzenoid fungicide selectively used against Oomycetes, a class of fungi-like microorganisms. It is a phenylamide fungicide, which means it contains the amide functional group attached to a phenyl group.

Etymology

The term "Metalaxyl" is derived from the chemical name methyl N-(methoxyacetyl)-N-(2,6-xylyl)-DL-alaninate.

Chemical Properties

Metalaxyl is a white crystalline solid with a slight aromatic odor. It is stable under normal temperatures and pressures, and it is not compatible with strong oxidizing agents. Its chemical formula is C15H21NO4 and its molecular weight is 279.33 g/mol.

Uses

Metalaxyl is used to control diseases caused by air and soil-borne Peronosporales on a wide range of temperate, subtropical and tropical crops. It is used on crops such as potatoes, peas, lettuce, and roses. It is also used on ornamentals, trees, shrubs, and turf.

Health Effects

Exposure to Metalaxyl can cause irritation to the eyes, skin, and respiratory tract. It may also cause nausea, vomiting, and diarrhea. Long-term exposure can lead to more serious health effects such as liver and kidney damage.

Environmental Impact

Metalaxyl is moderately toxic to birds, bees, and earthworms. It is highly toxic to fish and aquatic invertebrates. It has a low potential for bioaccumulation and is not expected to volatilize from water or soil surfaces.

Regulation

In the United States, Metalaxyl is classified as a Restricted Use Pesticide (RUP) by the Environmental Protection Agency (EPA) due to its potential to cause adverse effects to the environment and non-target organisms.

See Also

• Fungicide
• Oomycetes
• Peronosporales
• Environmental Protection Agency

Metalaxyl Resources
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