Phenylurea Herbicides

Phenylura herbicides control a range of broadleaf weed species.

Phenylurea herbicides are a chemical family of herbicides approved for use in both crop and non-crop areas. They control both annual and perennial broadleaf weeds. They are a restricted-use pesticide that can be applied only by licensed applicators.

How They Work

The photosynthesis of weeds is disrupted by phenylurea herbicides.

Phenylurea herbicides work by inhibiting the process of photosynthesis in weeds. They are applied at the soil level and absorbed through the roots. From there, they translocate into the foliage and kill the weeds.

Concerns

Toxicity to birds and aquatic species are a concern with phenylurea herbicides.

There is some concern with their use. While they have not been found to be toxic to humans, they are highly toxic to many aquatic species. Some toxicity has been found in wild birds as well.

Trade Names

Phenylurea herbicides are sold under a variety of trade names.

Phenylurea herbicides are marketed under a wide range of names. Some common formulations are Linuron, DuPont 326, Garnitan, Linex, Linorex, Lonox, Sarclex and Sinuron.

References

• University of Minnesota Extension Service; Herbicide Mode of Action and Injury Symptoms; Jeffrey L. Gunsolus and William S. Curran; 2002
• The University of Arizona Cooperative Extension; Herbicide Symptoms; Pat Clay et al.; 2001
• Extension Toxicology Network; Linuron; 1993