QuizalofopPethyl

Quizalofop-P-ethyl is a selective post-emergence herbicide used to control annual and perennial grass weeds in a variety of broadleaf crops. It belongs to the aryloxyphenoxypropionate class of herbicides, also known as "fops." Quizalofop-P-ethyl works by inhibiting the enzyme acetyl-CoA carboxylase (ACCase), which is essential for fatty acid synthesis in susceptible grasses. This disruption leads to cell membrane damage and ultimately the death of the weed. It is not effective against broadleaf weeds, making it a useful tool for selective weed management. The "P" in Quizalofop-P-ethyl indicates that it is the R-isomer, which is the biologically active form. It is typically applied as an emulsifiable concentrate and is absorbed by the leaves and stems of the target weeds. Translocation within the plant is primarily acropetal, meaning it moves upwards towards the growing points. Crops where Quizalofop-P-ethyl is commonly used include soybeans, cotton, canola, and sugar beets. Environmental fate studies indicate that it degrades in soil and water through microbial action and hydrolysis.