FIELD CONFIRMATION OF AN INDEX FOR PREDICTING YIELD LOSS OF WHEAT AND BARLEY DUE TO WILD OAT COMPETITION

Abstract

Indices of competition of 0.0339 for wild oats (Avena fatua L.) in wheat (Triticum aestivum L. emend Thel.) and 0.0230 for wild oats in barley (Hordeum vulgare L.) as developed by Dew (1972) were confirmed. Actual yield loss determinations were made by utilizing data collected from herbicide-treated (considered wild oat-free) and non-treated areas on field-scale trials scattered across Western Canada.