TABLE 2.

Percent survival of KCTR Palmer amaranth population to different post-emergence herbicides.

WSSA group	SOA	Herbicidesa	Survivalb (%)
2	ALS inhibitors	Chlorsulfuron	34
		Thifensulfuron	60
		Imazamox	70
		Imazethapyr	60
4	Synthetic auxins	2,4-D	84
5	PS II inhibitors	Atrazine	100
		Metribuzin	36
9	EPSPS inhibitors	Glyphosate	28
10	Glutamine synthetase inhibitors	Glufosinate	0
14	PPO inhibitors	Lactofen	84
		Fomesafen	29
22	PS I inhibitors	Paraquat	0
27	HPPD inhibitors	Mesotrione	90
		Tembotrione	84
5 + 27	PS II inhibitors + HPPD inhibitors	Atrazine + mesotrione	42
		Bromoxynil + pyrasulfotole	98

^aA total of 50 plants from each population (KCTR and KSS or MSS) were sprayed with each herbicide. ^bKSS and MSS were controlled (≥ 95%) with all the herbicides.