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Resistance ofBradyrhizobium japonicum strains to different fungicides and herbicides
A C Borges1, W V Guimarães, R M Muchovej
1Departamento de Biologia Geral, Universidade Federal de Viçosa, 36570, Viçosa, MG, Brazil.
Abstract:
Of 50 strains ofB. japonicum, 64%, 44% and 54% were resistant to the fungicides captan, pentachloronitrobenzene and tetramethylthiuram disulphate, respectively, at concentrations above those recommended for treatment of soybeans. 100% and 84% of the strains were resistant to the herbicides trifluralin and metribuzin, respectively, also at concentrations above those recommended for soybeans. No strain was resistant to alachlor above 3.5 μg/ml but 40% were sensitive to 2.5 μg/ml, these being, respectively, the maximum and minimum concentrations recommended for soybeans.
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