QUALIDADE FISIOLÓGICA E DESEMPENHO DE SEMENTES DE MILHO TRATADAS COM INSETICIDAS E ARMAZENADAS

Abstract

Mayze is one of the most cultivated agricultural products in the world. One of the fundamental rules for obtaining high yields is the choice of certified corn seeds with high germination power and high vigor. Among the practices available to guarantee or improve the performance of this crop, seed treatment stands out to defend the initial plant stand against pests and diseases. Despite these benefits, there is a lack of studies proving the ideal storage time these treated seeds can be stored so that they do not lose physiological quality and performance in the field. Aiming at the security of this information, this work evaluated the effect of seed treatment on two maize hybrids: AS1777PRO3 and AS1596PRO3 from the Agroeste brand, with the insecticides Imidacloprid + Thiodicarb (commercial mixture) and Imidacloprid + Fipronil (non-commercial mixture), considering the physiological quality of seeds and plant performance in the field, at different storage times of treated seeds, with storage times: 0, 30, 60 and 90 days. The work consisted of two experiments. The laboratory experiment was carried out at the Laboratory of Plant Anatomy of the Federal Institute of Goiano - Campus Rio Verde, from November 2019 to March 2020 and the field experiment was conducted in Perolândia – GO, during the period from March 2020 to July 2020. Seeds from hybrids responded in a similar way when subjected to different physiological tests, and germination was compromised over the course of the days of seed storage, which can affect the plant stand and final productivity. The performance of plants in the field was not affected in relation to the treatments Imidacloprid + Thiodicarb (commercial mixture) and Imidacloprid + Fipronil (non-commercial mixture), during the days of storage analyzed.