Phalaris minor resistance is getting serious with full circle of multiple resistances to herbicides of different MOA starting from isoproturon to diclofop-methyl, fenoxaprop, clodinafop, sulfosulfuron, pinoxaden and premix of mesosulfuron+iodosulfuron (Atlantis). Both target site and enhanced metabolism are recorded in different populations of Phalaris minor from Haryana. There is no recommended herbicide which can provide effective control of all resistant populations. PRE (pendimethalin) followed by POE (ACCase/ALS) and tank or premix using metribuzin is providing some relief, but again there is regeneration in plants treated with metribuzin. Pyroxasulfone has been found effective against multiple herbicide resistant populations of P. minor; its field efficacy will depend on its large scale field use after recommendation/availability to the farmers.

Littleseed canaqgrass (Phalaris minor Retz.), a troublesome weed of wheat in India, has evolved multiple herbicide resistance (MHR) across three modes of action: photoynthssis at photosystem II site A, acetyl-coA-carboxylase (ACCase) and ALS inhibition. The MHR (MHR) populations had a low level of sulfosulfuron resistance but high level of resistance to clodinafop and fenoxaprop. Some of the resistant populations have GR50 values for clodinafop 12 times higher than susceptible population. The multiple herbicide resistant populations (resistant to sulfosulfuron, clodinafop, pinoxaden and isoproturon) are susceptible to the triazine (metribuzin and terbutryn) and dinitroaniline (pendimethalin and trifluralin) herbicides. Triazine herbicides have selectivity problem in wheat and due to lack of knowledge and non availability of effective herbicides many farmers are facing severe yield losses due to multiple herbicide resistance.