A review on the last list of herbicides and the most important weeds of Iran

From 1967, when the first herbicide was registered in Iran, to mid 2009, 98 herbicides have been registered. There are several experimental herbicides in some stage of progress toward marketability. Currently, the greatest number of herbicides are belonging to the following groups: photosynthesis inhibitors with 23 herbicides, Acetyl coenzyme A carboxylase (ACCase) inhibitors with 16 herbicides, Acetolactate Synthase (ALS) inhibitors with 14 herbicides, 14 premixed herbicides formulations, lipid inhibitors and synthetic auxins, each with 6 herbicides. The most important weeds of main crops, orchards and vegetable fields are 214 species (105 broadleaf and 22 grasses) and 87 species are perennials. Seventy percent of these weeds are C3, 15% are C4, 1% are CAM and 13% are unknown.