Table 2.

EPSPS gene duplication and glyphosate resistance level (LD₅₀, dose required to cause 50% mortality) reported in glyphosate-resistant weed species

Note that some values for LD₅₀ were measured in different populations and reported in different studies than EPSPS copy number (adapted from Ref. 17). This research was originally published in Pest Management Science. Sammons, D. R., and Gaines, T. A. Glyphosate resistance: state of knowledge. Pest Manag. Sci. 2014; 70:1367–1377. © John Wiley & Sons, Inc.

Species	EPSPS relative genomic copy number range	LD50 (resistant/susceptible)
Bassia scoparia	3–9	2–8
Chloris truncata	32–48 (51)	2.4–8.7
Hordeum glaucum	9–11 (52)	2.8–6.6
Bromus diandrus	10–36 (53)	4.7
Amaranthus spinosus	26–37	5
Amaranthus tuberculatus	2–8	5–19
Lolium multiflorum	15–25	12–13
Amaranthus palmeri	2–160	15–40
Eleusine indica	28 (54)