Table 2.

Parameters of the log-logistic equations used to calculate the glyphosate rates required for 50% survival (LD₅₀) and reduction fresh weight (GR₅₀) of the different accessions of P. hyterophorus from Cuba and Dominican Republic.

Accessions	Survivala (%)						Fresh weight reductionb (%)
	d	b	R2	LD50 (g ae ha−1)	RI	p	d	b	R2	GR50 (g ae ha−1)	RI	p
Cu-R1	99.8	6.1	0.98	6364 ± 122	27.5	<0.0001	99.4	1.8	0.99	1370 ± 191	24.5	<0.0001
Cu-R2	98.9	2.9	0.99	2794 ± 90	12.0	<0.0001	103.0	1.5	0.95	437 ± 28	7.8	<0.0001
Cu-R3	100.9	2.6	0.99	1415 ± 55	6.1	<0.0001	103.3	1.3	0.96	151 ± 13	2.7	0.003
Cu-S	102.7	3.1	0.97	232 ± 23	–	–	103.2	1.7	0.98	56 ± 6	–	–
Do-R1	100.1	5.1	0.96	4456 ± 76	22.7	<0.0001	98.2	1.8	0.98	939 ± 25	20.0	<0.0001
Do-R2	99.9	2.7	0.98	2550 ± 92	13.0	<0.0001	99.6	1.8	0.99	547 ± 30	11.6	<0.0001
Do-R3	100.7	1.7	0.99	1821 ± 63	9.3	<0.0001	97.9	1.3	0.99	339 ± 27	7.2	<0.0001
Do-R4	100.9	1.9	0.99	1242 ± 65	6.3	<0.0001	96.4	1.3	0.96	255 ± 33	5.4	<0.0001
Do-S	100.5	4.5	0.97	196 ± 8	–	–	100.6	1.7	0.98	47 ± 4	–	–

^aFor Y = {(d) / [1 + (x/ LD₅₀) exp b]} Where Y is the survival expressed as a percentage of the untreated control, d is the coefficient corresponding to the upper asymptote, b is the slope of the curve in LD₅₀, LD₅₀ is the herbicide rate at the point of inflection halfway, and x is the herbicide dose.

^bFor Y = (d) / [1 + (x/ GR₅₀) exp b] Where Y is the above-ground weight expressed as a percentage of the untreated control, d is the coefficient corresponding to the upper asymptote, b is the slope of the curve in GR₅₀, GR₅₀ is the herbicide rate at the point of inflection halfway, and x is the herbicide dose.