A proteção das sementes contra pragas e doenças nas fases iniciais do desenvolvimento da cultura é de grande importância para a cadeia produtiva da soja. A aplicação de inseticidas e fungicidas via revestimento de sementes proporciona esta proteção, no entanto, não deve ocasionar prejuízos à qualidade fisiológica dos lotes de sementes, seja imediatamente depois do revestimento ou após armazenamento. Para avaliar o efeito do revestimento de sementes de soja com vários agroquímicos sobre a qualidade fisiológica das mesmas durante o armazenamento, foram realizados dois ensaios com as cultivares M6972 IPRO e M7739 IPRO. Vinte quilogramas de cada cultivar foram submetidos a revestimento com os produtos Cropstar, Derosal Plus, Standak Top e Avicta Completo, avaliando -se a primeira contagem de germinação, germinação, envelhecimento acelerado e emergência em canteiro das sementes, durante 60 dias de armazenamento sob condições ambientais não controladas. O armazenamento sob condições de temperatura e umidade relativa não controladas influencia negativamente a qualidade fisiológica das sementes de soja. As cultivares usadas responderam de forma diferente ao revestimento de sementes com os diferentes agroquímicos testados. O revestimento de sementes de soja da cultivar M6972 IPRO com Standak Top ou com Avicta Completo mantem a percentagem de emergência de plântulas durante os 60 dias de armazenamento. O revestimento de sementes de soja da cultivar M7739 IPRO com Standak Top ocasiona maior qualidade fisiológica de sementes do que os demais revestimentos. Palavras -chave: fitofármacos, fungicida, Glycine max, inseticida, tratamento de sementes. A B S T R A C TThe protection of seeds against pests and diseases in the early stages of crop development is of great importance to the soybean production chain. Coating seeds with insecticides and fungicides provides this protection; however, it should not cause damage to the physiological quality of seed lots, immediately after coating or after storage. To evaluate the effect of soybean seed coating with various agrochemicals on the physiological quality of seeds during storage, two assays were conducted with the cultivars M6972 IPRO and M7739 IPRO. Twenty kilograms of each cultivar were subjected to coating with products Cropstar, Derosal Plus, Standak Top and Avicta Completo, evaluating the first counting of germination, germination, accelerated aging and seedling emergence of seeds for 60 days of storage under environmental conditions. Storage under not controlled conditions of temperature and relative humidity negatively influences the physiological quality of soybean seeds. The cultivars used responded differently to the seed coating with different agrochemical tested. Soybean seed coating of cultivar M6972 IPRO with Standak Top or Avicta Completo maintains the percentage of seedling emergence during the 60 days of storage. Soybean seed coating of cultivar M7739 IPRO with Standak Top brings better physiological seed quality than other coatings.
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