Pendimethalin  is an  herbicide  used in premergence and postemergence applications to control annual grasses and certain broadleaf weeds. It inhibits cell division and cell elongation. Pendimethalin is listed in the K1-group according to the HRAC classification and is approved in Europe, North America, South America, Africa, Asia and Oceania for different crops including cereals (wheat, barley, rye, triticale), corn, soybeans, rice, potato, legumes, fruits, vegetables, nuts as well as lawns and ornamental plants.


Pendimethalin protects crops like wheat, corn, soybeans potatoes, cabbage, peas, carrots and asparagus. It is used to control annual grasses and certain broadleaf weeds which interfere with growth, development, yield and quality of agricultural and horticultural crops by competing on nutrients, water and light.

In areas where weed infestation is particularly high, yield losses can render wheat production economically unviable.In addition to wheat, a large number of crops are grown in Europe that are a relatively small percentage of total agricultural output. Herbicide options are limited for these minor crops, with few effective herbicides available in the vegetable sector. Long-term field studies performed in Germany by governmental research and advisory institutes together with farmers rank Pendimethalin as an efficient herbicide to control blackgrass, regarding to weed control efficacy, crop yield, treatment costs and environmental impact

Mode of Action

Pendimethalin acts both pre-emergence, that is before weed seedlings have emerged, and early post-emergence. Pendimethalin inhibits root and shoot growth. It controls the weed population and prevents weeds from emerging, particularly during the crucial development phase of the crop. Its primary  mode of action  is to prevent plant cell division and elongation in susceptible species. In the HRAC classification of herbicides according their mode of action, pendimethalin is listed in group K1.


Herbicide  resistance  typically increases production costs and limits options for herbicide selection, cultivations and rotations. Up to now Pendimethalin does not show resistance. It is not cross-resistant with other grass weed herbicides. This means that Pendimethalin supports the effects of other supplementary grass weed herbicides that use a different mode of action.


CAS number 40487-42-1  
PubChem 38479
KEGG C11019