Fenarimol

Fenarimol is a fungicide that belongs to the pyrimidine class of chemicals. It is used to control a wide range of fungi that cause diseases in crops, including powdery mildew, rust, and scab. Fenarimol is also used in the treatment of turf diseases in golf courses and other recreational areas.

History

Fenarimol was first registered for use in the United States in 1972. It was developed by the Rhône-Poulenc company, which later became part of the Bayer CropScience division of Bayer.

Mode of Action

Fenarimol works by inhibiting the biosynthesis of ergosterol, a critical component of fungal cell membranes. This disruption of cell membrane integrity leads to the death of the fungus.

Usage

Fenarimol is used on a variety of crops, including apples, pears, peaches, grapes, and strawberries. It is also used on ornamental plants and turfgrasses. The fungicide is typically applied as a spray, either alone or in combination with other fungicides.

Safety and Environmental Impact

Fenarimol is considered to be of low toxicity to humans and animals. However, it can be harmful if swallowed, inhaled, or absorbed through the skin. It is also toxic to fish and other aquatic organisms.

In the environment, fenarimol is moderately persistent, with a half-life in soil of between 30 and 100 days. It has low mobility in soil, which reduces the risk of groundwater contamination.

Resistance

Some strains of fungi have developed resistance to fenarimol, particularly those causing powdery mildew and apple scab. This has led to the recommendation of using fenarimol in rotation with other fungicides to delay the development of resistance.

See Also

• List of fungicides
• Pesticide resistance
• Integrated pest management