Qualidade fisiológica de sementes de arroz tratadas com inseticidas ao longo do armazenamento

Abstract

Seed quality is the starting point to have a good stand of seedlings in the field. Seed treatment is a technique widely used by farmers at sowing time. Insecticides are products which can be used for this purpose as well without knowing their effects on seed. Soon, it becomes clear the importance of ensuring the quality of seed throughout their life which includes storage. Therefore, we aimed to evaluate the physiological quality of seeds treated with insecticides during storage. The treatments were created from using a fungicide and three active principles of insecticides as follows: T0 - control, T1 - (Carbensazim + Tiram) + (thiamethoxam), T2 - (Carbensazim + Tiram) + (Imidacloprid + thiodicarb), T3 - (Carbensazim + Tiram) + (Imidacloprid), T4 - (Carbensazim + Tiram) + (thiamethoxam) + (Imidacloprid + thiodicarb) + (Imidacloprid). All the commercial rate. The experimental design was a completely randomized design with four replications. Seed samples of cultivar Puita - Inta CL and during storage in controlled atmosphere chamber at 0, 15, 60, 120 and 158 days were evaluated for germination and vigor through the first count, cold test, length and dry mass of shoots and roots. The results of the germination test showed that the treated seeds were affected. Over time, the treated seeds ensured the maintenance of germination within the marketing standards to the third evaluated the time and kept the force for a specified time. It is thus possible that the treatment of seeds with the tested insecticides can disrupt maintain or even improve the quality of seeds depending on the product applied as a seed treatment during storage.