Qualidade fisiológica de sementes de soja (Glycine max (L.) Merrill) tratadas com fungicida e inseticida e submetidas a diferentes períodos de armazenamento

Abstract

The soy (Glycine max (L.) Merrill) is a plant would originate from Asia that possesss great marked value of in all world-wide scene, with a planted area of 31,4 million hectares and exceeding the production of 95 million tons in harvest 2014/2015 in Brazil. This culture is mainly used for the production of vegetal oil and bran for animal production. The present study it had as objective to evaluate the effect caused for the treatment of seeds with fungicide and insecticides and associations between them in the physiological quality of these in different periods of storage. Seeds of harvest 2013/2014 for accomplishment of the tests had been used, where the seeds had been germinated in paper germitest in chamber of germination of the Mangelsdorf type. The used experimental delineation entirely was casualizado in factorial project 4x6, composition for 4 periods of storage in natural environment conditions, being 1, 10, 20 and 30 days after the treatment of the seeds and 6 treatments with fungicide and insecticide, separate and in association. All the treatments had followed the recommendations of the manufacturers in the formularization, thus the treatments had been: witness without treatment, [Carboxina + Tiram] (300 ml/100 kg), [Bifentrina + Imidacloprid] (600 ml/100 kg), Fipronil (200 ml/100 kg), [Carboxina + Tiram] + [Bifentrina + Imidacloprid] and [Carboxina + Tiram] + Fipronil. All the treatments had received ratio from water until reached the volume of calde of 6 ml, the witness received only water. The storage was made in paper packages contends 500 grams of seeds each. Tests of germination, length of plântula and dry substance of aerial part had been carried through. In accordance with the observed results, the treatments of seeds had influenced of negative form the variable germination of the seeds and the length of plântula, did not have significant difference for changeable dry substance of aerial part. The best ones resulted had been gotten by the witness who did not receive treatment, followed of the treatments that had received only [Bifentrina + Imidacloprid] and Fipronil. The storage of the treated seeds diminished the physiological quality of the seeds.