Sementes de milho tratadas: substratos e alternativas para o teste de germinação

Abstract

The aim of this study was to evaluate the use of substrates for implementing the germination test in treated corn seeds with pesticides. We used corn seeds season 2015/2016, germination rate equal or higher than 90% and an average water content of 12.5%. Seeds were submitted to four chemical treatments (Cruiser® 350 FS; Avicta Complete; Standak Top and Crop Star). After, the germination potential of the combinations of seeds x chemical treatments x substrates were evaluated. Thus, it is concluded that the most suitable substrate for the germination test in corn seeds depends on the type of product and the active ingredient seed treatment. The use of vermiculite for the germination test in treated corn seeds showed to be a viable alternative because of the positive interference in treatments conducted with this substrate. The temperature 30 °C enables more uniform and quick development of normal seedlings in the germination test in treated or untreated corn seeds. The increase of normal seedlings in treated seeds is related to the bioactive ingredient that contribute to a better and faster initial development.