TITLE:
Tolerance of Four Market Classes of Dry Beans to Tribenuron and Carfentrazone Applied Preplant
AUTHORS:
Nader Soltani, Christy Shropshire, Peter H. Sikkema
KEYWORDS:
Azuki Bean, Kidney Bean, Small Red Bean, Sensitivity, Tolerance, White Bean
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.12 No.4,
April
16,
2021
ABSTRACT: Limited information is
available on the sensitivity of dry beans to tribenuron and carfentrazone applied preplant (PP). Four field trials were
conducted at Exeter and Ridgetown, ON, Canada in 2019 and 2020 to determine the
tolerance of azuki, kidney, small red and
white beans to glyphosate (1800 g·ae·ha-1)
+ tribenuron (15 g·ai·ha-1), glyphosate
(1800 g·ae·ha-1) +
carfentrazone (35g·ai·ha-1) and
glyphosate (1800 g·ae·ha-1) + tribenuron
(15 g·ai·ha-1) + carfentrazone (35 g·ai·ha-1) applied PP 1 - 2 days prior to seeding dry beans. Glyphosate + tribenuron, glyphosate + carfentrazone, and glyphosate +
tribenuron + carfentrazone, applied PP, caused 5%, 5% and 9% bean injury at 1
WAE; 7%, 6% and 10% bean injury at 2 WAE and 6%, 5% and 8% bean injury at 4
WAE, respectively. At 8 WAE, there was 0, 1% and 4% injury in azuki bean; 1%, 2%
and 2% injury in kidney bean; 3%, 2% and 3% injury in small red bean; and 6%, 3%
and 2% injury in white bean with glyphosate + tribenuron, glyphosate +
carfentrazone, and glyphosate + tribenuron + carfentrazone applied PP,
respectively. The injury was significantly greater with glyphosate + tribenuron
in small red and white beans compared to the azuki and kidney beans. There was
no difference between injury levels among market classes of dry been with
glyphosate + carfentrazone or glyphosate + tribenuron + carfentrazone applied
PP. There was no effect of glyphosate + tribenuron, glyphosate + carfentrazone
and glyphosate + tribenuron + carfentrazone on dry bean plant stand, maturity
and seed yield. However, dry bean biomass was reduced as much as 15% with
glyphosate + tribenuron and 13% with
glyphosate + tribenuron + carfentrazone compared to the untreated control. Dry bean height was reduced 4% with glyphosate + tribenuron +
carfentrazone but was not affected with other treatments. Based on these
results, there is potential for using glyphosate plus tribenuron or carfentrazone
for preplant weed management in dry bean production.