Competition between Galium aparine and winter wheat: optimum timing of herbicide application to minimise yield loss

摘要

A field experiment was carried out to investigate the critical timing of competition between Galium aparine and winter wheat. Four herbicides (amidosulfuron, HOE 3208, fluroxypyr + metosulam and fluroxypyr) were used to remove G. aparine at a range ofdates. All herbicide treatments gave effective control of G. aparine if sprayed before May, with no significant wheat yield losses compared with the weed-free control. Herbicide applications in May and June allowed large amounts of G. aparine biomass todevelop, resulting in significant wheat yield losses compared with the weed-free control and earlier-sprayed treatments.