Tratamento de sementes de soja, com Standak Top® e submetidas a diferentes períodos de armazenamento

Abstract

Seed treatment with fungicides and insecticides is essential to control the main pests and early diseases in soybean cultivation, farmers often do not have the time to treat and sow on the same day, with the seeds stored until they are sown. Not all the effects of this practice on seed quality are known. The objective of this research was to evaluate the influence of seed treatment with Standak Top® (pyraclostrobin, methyl thiophanate and fipronil), submitted to different storage periods, on the initial quality of soybean seeds. Seeds of the cultivar Nidera 5909 RG, treated with 2 ml of commercial product per kg of seeds and stored for seven periods (0, 7, 14, 21, 28, 35 and 42 days) were used. The experimental design was completely randomized with four replicates. The percentage of germination, shoot length and root length of the seedlings were evaluated. The results were submitted to analysis of variance and comparison of means by means of the Tukey test at 5% of probability. Seed treatment with Standak top® in different storage periods did not significantly affect the percentage of seed germination, while the storage time of the seeds treated for periods of 7 and 14 days favored initial shoot growth. Storage by periods from 14 to 21 days favored root growth. Therefore, the absence of treatment or the storage of treated seeds for periods superior to 14 and 21 days no interfered in the growth of the aerial part and roots of soybean seedlings.