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The objective of this work was to evaluate the adhesion of the coating with basalt agromineral on cowpea seeds (Vigna unguiculata (L.) Walp.) and the effects of the adhesive based on polyvinyl acetate (PVA) on germination. The experiment occurred out at Experimental area of Lowland Agricultural Research Station of Embrapa Temperate Climate, Capão do Leão/RS, Brazil. Cowpea seeds coated with basalt agromineral in the form of ultrafine powder were used, using different dilutions of PVA as an adhesive. The dilutions used corresponded to 0.2, 0.4, 0.6, 0.8, 1.0, 1,2, 1.4, 1.6, 1.8 and 2.0 ml of PVA, completed with distilled water until a total volume of 2.0 ml of the mixture was obtained. Factor A was the concentration of the PVA adhesive: 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100%; the factor B was: with and without coating. The variables observed were: germination in vermiculite substrate from counts at five and eight days after sowing and; adhesion test of the seed coatings from the sowing simulation with saraquá. Dilution of the PVA-based adhesive influences the amount of basalt powder adhered to the seeds. As the adhesive is diluted the amount of basalt powder increases in the coating of the seeds. The simulation of sowing with saraquá was a good test on the adherence of seeds coating. As the PVA concentration in the adhesive increases, smaller loss of basalt powder occurs in the coated seeds.

ADERÊNCIA DO PÓ DE BASALTO À SEMENTES DE FEIJÃO MIÚDO UTILIZANDO COMO ADESIVO COLA PVA