Effect of Glyphosate and Mancozeb on the Rhizobia Isolated from Nodules of Vicia faba L. and on Their N₂-Fixation, North Showa, Amhara Regional State, Ethiopia

Table 1

Resistance evaluation of rhizobial isolates towards various concentrations of glyphosate.

Isolates	Control	Inhibition effect of different concentrations of glyphosate (µg a.e. L^−1) on rhizobial isolates against control (OD 620 nm)
		100 µg a.e. L^−1	%S	150 µg a.e. L^−1	%S	200 µg a.e. L^−1	%S
AAUW-1	0.417	0.091	22	0.082	20	0.043	10
AAUW-2	0.377	0.051	14	0.044	12	0.032	8
AAUW-3	0.457	0.062	14	0.058	13	0.044	10
AAUW-4	0.456	0.057	12	0.041	9	0.026	6
AAUW-5	0.343	0.064	19	0.057	17	0.054	16
AAUW-6	0.467	0.094	20	0.090	19	0.085	8
AAUW-7	0.385	0.071	18	0.068	7	0.038	10
AAUW-8	0.411	0.017	4	0.012	2	0.008	2
AAUW-9	0.373	0.045	12	0.032	3	0.030	8
AAUW-10	0.414	0.092	22	0.086	21	0.077	19

Numbers in the same column followed by different letters are significantly different at confidence level (Tukey’s HSD). Letters in the columns (a, b, c, d, e, f, g, and h) are ranks of the mean; %S = percentage of survival; AAUW = Addis Ababa University Wolki variety.