EFFECT OF SOME FUNGICIDE SEED TREATMENTS ON THE SURVIVAL OF BRADYRHIZOBIUM-JAPONICUM AND ON THE NODULATION AND YIELD OF SOYBEAN [GLYCINE-MAX (L) MERR]

Several commercial fungicide seed treatments were evaluated for their possible effect on the survival of Bradyrhizobium japonicum on seeds a nd on the nodulation and yield of soybeans in a greenhouse and a field experiment. Quinolate Pro (carbendazim and oxine copper), Vitavax 200 FF (carboxin and thiram), and Monceren (pencycuron) had a small effect or no effect on the survival of B. japonicum and on the nodulation an d yield of soybeans. They can thus be considered compatible with soybe an seed inoculation. Germipro UFB (carbendazim and iprodione), Apron 3 5J (metalaxyl), and Tachigaren (hymexazol) decreased B. japonicum surv ival and the nodulation and yield of soybeans and thus cannot be consi dered compatible with soybean seed inoculation.