Herbicide Resistance Potential of Canary Grass (Phalaris minor Retz.) Against Fenoxaprop-P-Ethyl

Abstract

Excessive herbicidal use emerged as major environmental concern which leads to various severe health issues for human and
animals as well. It also triggered herbicidal resistance in various weeds such as annual ryegrass, canary grass, wild oats, and
brome grass etc. Herbicidal resistance potential of canary grass is one of the most crucial barriers for wheat growers in Pakistan.
Hence, the present study was conducted to check the herbicidal resistance potential of Phalaris minor collected from district
Sargodha of Punjab against most commonly used herbicide i.e., fenoxaprop-P-ethyl. Pot experiments were carried out in
Completely Randomized Design (CRD) with four replicates for six treatments (0X, 0.25X, 0.5X, 1X, 2X and 4X). Treatments were
applied after emergence of 3rd to 4th leaf of P. minor seedlings and data were recorded after 21 days of treatment application.
Visual injury, mortality percentage, plant height, root length and biomass production and resistance index parameters were used
to evaluate the herbicide resistance potential of weed. A significant variation was observed in herbicide resistance potential () of
P. minor biotypes against fenoxaprop-P-ethyl, chlodinafop-propargyl and sulfosulfuron and all biotypes were found to be
herbicide resistant. Hence, present study does not recommend use of fenoxaprop-P-ethyl to control P. minor for sustainable wheat
production in Sargodha.