Table II. Herbicide-susceptible L. rigidum populations with some capacity to metabolize herbicides.

Susceptible Population	Herbicides with Some Initial Metabolism	References
VLR1	Chlorsulfuron	Christopher et al. (1991, 1992); Preston et al. (1996)
	Diclofop	Holtum et al. (1991); Tardif et al. (1996); Preston et al. (1996)
	Chlorotoluron	Burnet et al. (1993a); Preston et al. (1996)
	Simazine	Burnet et al. (1993b); Preston et al. (1996)
	Sethoxydim	Tardif et al. (1993); Tardif and Powles (1994)
	Tralkoxydim	Preston et al. (1996)
	Haloxyfop	Tardif et al. (1996)
Low-rate-selected supersensitive VLR1 subset	Diclofop	Han et al. (2013)
VLR2	Chlorotoluron	Preston and Powles (1997)
VLR6	Chlorsulfuron	Christopher et al. (1991)
WALR1	Diclofop	Yu et al. (2013b)