Studies on Resistance of Wild Oat (Avenafatua L.) to Flamprop-M-isopropyl (Suffix) and Clodinafop­ propargyl (Topik) Herbicides in Assiut Area

Abstract

Wild oat (Avena fatua L.) is considered the most serious annual weed causing yield loss in cereal crops, and the second most important weed in herbicide resistance problems globally. The evolution and development of resistance in this weed is a critical problem for effective chemical control. Some aryloxyphenoxypropionate "APP", cyclohexanedione "CHD" (acetyl­ CoA carboxylase "ACCase" inhibitors), imidazolinone (aceto-lactate synthase "ALS" inhibitors) and arylaminopropionic acid (unknown target site) herbicides are used as post-emergence application to control grass weeds, including wild oat, in cereal crops. Resistance and cross-resistance in this weed to these herbicides in many countries, as well as mechanism of resistance including alteration of the target site, metabolic detoxification in wild oat and crops, are discussed in many previous studies.