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A utilizacao de inseticidas no tratamento de sementes cresce a cada safra em decorrencia do ataque progressivo de diferentes especies de insetos-pragas. O objetivo deste trabalho foi avaliar a influencia do fipronil e tiametoxam no desempenho fisiologico das sementes de soja sob armazenamento. O delineamento experimental utilizado foi inteiramente casualizado com quatro repeticoes, distribuido em esquema fatorial (4 x 3 x 2), utilizou-se quatro cultivares (BMX MAGNA RR, BMX Potencia RR, NK 3358 RR e NK 7059 RR), tres tratamentos de sementes (fipronil e tiametoxam e uma testemunha sem inseticida), em dois periodos de armazenamento (zero e 180 dias apos a colheita). A qualidade fisiologica das sementes foi avaliada pelos testes: germinacao (primeira contagem e contagem final), envelhecimento acelerado, frio modificado, comprimento de plântula e raiz. Diante dos resultados obtidos, pode-se inferir que os inseticidas fipronil e tiametoxam influenciam negativamente a qualidade fisiologica das sementes de soja submetidas ao armazenamento por 180 dias. Os inseticidas apos o periodo de armazenamento afeta negativamente o comprimento de raiz. Abstract The use of insecticide seed treatment grows each season as a result of progressive attack different species of insect pest. The objective of this study was to evaluate the influence of fipronil and thiamethoxam in the physiological performance of soybeans in storage. The experimental design was completely randomized with four replications, distributed a factorial design (4 x 3 x 2), we used four cultivars (BMX Magna RR, BMX Power RR, NK 3358 RR and NK 7059 RR), three seed treatments (fipronil and thiamethoxam insecticide and untreated) in two storage periods (zero and 180 days). The physiological quality of seeds was determined by the tests: germination (first count and final count), accelerated aging, modified cold, seedling length and root. Results can be inferred that the insecticide fitronil and thiamethoxam adversely affect the physiological quality of soy bean seeds subjected to storage for 180 days. The insecticides after the storage period adversely affect the root length.

ambiência

Influência do armazenamento na qualidade fisiológica de sementes de soja tratadas com inseticidas / Influence of storage on thephysiological qualityof soybean seeds treated with insecticides