TITLE:
Sensitivity of Adzuki Bean (Vigna angularis) to Acifluorfen, Fomesafen, Bentazon, Imazethapyr and Halosulfuron-Methyl Applied Postemergence
AUTHORS:
Nader Soltani, Christy Shropshire, Peter H. Sikkema
KEYWORDS:
Acifluorfen, Bentazon, Biomass, Fomesafen, Imazethapyr, Halosulfuron-Methyl, Injury, Vigna angularis, Yield
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.5,
April
26,
2017
ABSTRACT: New herbicide options are needed for postemergence
(POST) broadleaf weed control in adzuki bean. A field study, of five experiments, was conducted
over a three-year period (2014, 2015, 2016) in Ontario to evaluate the
tolerance of adzuki bean to the POST application of acifluorfen (600 and 1200 g·ai·ha-1), fomesafen (240 and 480 g·ai·ha-1), bentazon (1080 and 2160 g·ai·ha-1), imazethapyr (100 and 200 g·ai·ha-1) and halosulfuron-methyl (75 and 150 g·ai·ha-1).
Acifluorfen and fomesafen applied POST caused as much as 12% visible injury at
the 1X rate and 20% visible injury at the 2X rate but had no adverse effect on
adzuki bean population, shoot dry weight, height, maturity or yield. Bentazon
caused as much as 23% visible injury at 1080 g·ai·ha-1 and 28% visible injury at 2160 g·ai·ha-1 but caused no adverse effect on adzuki bean population, shoot dry weight,
height, maturity or yield at either rate, except at 2160 g·ai·ha-1 which reduced shoot dry weight 20% and height 12%. Imazethapyr caused as much
as 22% visible injury at 100 g·ai·ha-1 and 34% visible injury at 200 g·ai·ha-1 but caused no adverse effect on adzuki bean population, shoot dry weight,
height, maturity or yield at either rate except at 200 g·ai·ha-1 which delayed maturity slightly. Halosulfuron-methyl caused as much as 65%
visible injury and reduced shoot dry weight, height and yield 64%, 41%, and
28%, respectively. This research concludes that acfluorfen, fomesafen,
bentazon, imazethapyr and halosulfuron at the rates evaluated can cause the significant injury in adzuki bean.