Dithiopyr is a pyridyl carboxylic acid herbicide, and its domestic compound patent has expired.

It is a pyridyl carboxylic acid herbicide and a mitotic inhibitor. It is mainly absorbed by stems, leaves and roots to block the formation of spindle microtubules, causing microtubules to be short, unable to form normal spindle filaments, making cells unable to undergo mitosis, and the growth of weeds stops and dies. Fluthiophene is low toxic. At very low dosage, fluthiophene has high herbicidal activity, which is not affected by temperature, soil type and water level, and has a long effective period. It is safe for rice. It can be mixed with sulfonylurea herbicides.

It can control annual weeds in rice fields, such as barnyardgrass, yardgrass, heterotypic sedge and jiejie vegetable; It can be used in front of the lawn bud to control annual grass weeds, such as purple horse Tang, as well as annual broad-leaved weeds, such as curly ear, Jingtian, and lachrymopsis Adenophora.