Tratamento químico de sementes de soja: reflexos no desenvolvimento inicial de plantas

Abstract

Nowadays one of the main limitation of production in the various crops is the pests. Soybean cultivation is subject, throughout its cycle, to the attack of different species of insects. Although these insects have their populations reduced by predators, parasitoids and diseases, at levels dependent on the environmental conditions and pest management practiced, when they reach high populations, capable of causing significant losses in crop yield, they need to be controlled. Based on this, the best thing to do is to prevent, by applying agrochemicals to the seed itself. In this study 4 pesticides were evaluated to control such pests: fipronil + tiran + carbendazin (STANDAK TOP), Imidacloprid + thiodicarb (CROPSTAR), imidacloprid (GAUCHO) and Chlorantraniliprole (DERMACOR) and a control. This work was carried out in pots of 5 kg, where the design used is the DIC, and has as objective to define which of these pesticides will present the best response in the speed of seedling development and their vigor, being also evaluated, factors such as: height Of plants at seven, fourteen and twenty-one days; Mass of green matter and dry mass of aerial part and root. The treatments, fipronil + tiran + caberdazin and chlorantraniliprole, besides the control presented superiority in the emergence of plants; Regarding plant height at seven, fourteen and twenty one days, the expected result was not different, both fipronil + tiran + caberdazin and chlorantraniliprole were superior to the other treatments; The results were not totally expected, especially in plant height, but it is justified due to the period of the year in relation to temperature and photojournalism.