Three field experiments were carried out during 2017-2019 at the University of Guelph Huron Research Station near Exeter, Ontario, Canada to determine the effect of halosulfuron rate (25, 37.5 or 50 g<span style=&q...Three field experiments were carried out during 2017-2019 at the University of Guelph Huron Research Station near Exeter, Ontario, Canada to determine the effect of halosulfuron rate (25, 37.5 or 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>) and application timing (POST 1, POST 2 and POST 3) on volunteer azuki bean control in white bean. At POST 1, halosulfuron at 25, 37.5 and 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> controlled volunteer azuki bean 46% - 50% at 1 week after application (WAA), controlled decreased to 16% - 25% at 8 WAA. At POST 2, volunteer azuki bean controlled decreased from 34% - 39% at 1 WAA to 17% - 27% at 8 WAA. A similar trend was observed at POST 3. Halosulfuron applied POST 1 at 25, 37.5 and 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> reduced biomass 49%, 64% and 69%, respectively. Halosulfuron applied POST 2 did not reduce volunteer azuki bean biomass at 25 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>, but decreased biomass 51% at 37.5 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> and 49% at 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>. Similarly, halosulfuron applied POST 3 did not reduce volunteer azuki bean biomass at 25 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>, but decreased biomass 40% at 37.5 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> and 44% at 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>. There was as much as 19%, 22% and 25% dockage with halosulfuron applied POST 1, POST 2 and POST 3, respectively. Volunteer azuki bean interference reduced white bean yield 40%. Reduced volunteer azuki bean interference with halosulfuron applied POST 1 at 37.5 or 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> resulted in an increase in white bean yield relative to the weedy control;however white yield was less than the weed-free control. This study concludes that halosulfuron at rates and application timings evaluated does not provide adequate control of volunteer azuki bean in white bean.展开更多
文摘Three field experiments were carried out during 2017-2019 at the University of Guelph Huron Research Station near Exeter, Ontario, Canada to determine the effect of halosulfuron rate (25, 37.5 or 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>) and application timing (POST 1, POST 2 and POST 3) on volunteer azuki bean control in white bean. At POST 1, halosulfuron at 25, 37.5 and 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> controlled volunteer azuki bean 46% - 50% at 1 week after application (WAA), controlled decreased to 16% - 25% at 8 WAA. At POST 2, volunteer azuki bean controlled decreased from 34% - 39% at 1 WAA to 17% - 27% at 8 WAA. A similar trend was observed at POST 3. Halosulfuron applied POST 1 at 25, 37.5 and 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> reduced biomass 49%, 64% and 69%, respectively. Halosulfuron applied POST 2 did not reduce volunteer azuki bean biomass at 25 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>, but decreased biomass 51% at 37.5 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> and 49% at 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>. Similarly, halosulfuron applied POST 3 did not reduce volunteer azuki bean biomass at 25 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>, but decreased biomass 40% at 37.5 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> and 44% at 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup>. There was as much as 19%, 22% and 25% dockage with halosulfuron applied POST 1, POST 2 and POST 3, respectively. Volunteer azuki bean interference reduced white bean yield 40%. Reduced volunteer azuki bean interference with halosulfuron applied POST 1 at 37.5 or 50 g<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ai<span style="white-space:nowrap;"><span style="white-space:nowrap;">∙</span></span>ha<sup>-1</sup> resulted in an increase in white bean yield relative to the weedy control;however white yield was less than the weed-free control. This study concludes that halosulfuron at rates and application timings evaluated does not provide adequate control of volunteer azuki bean in white bean.