Viabilidade agronômica da Tecnologia Inox no cultivo de soja

Abstract

The soybean (Glycine max) is constantly threatened by complex diseases that affect production. Among these diseases is Asian rust (Phakopsora pachyrhizi). Because of the need to control the disease, several companies, through their breeding programs seek cultivars with higher levels of tolerance or even resistance to Asian soybean rust. Therefore, the INOX ™ technology has emerged, which promotes through the action of genes, a fabric of hypersensitivity reaction in response to the infection of the disease. This study was conducted to evaluate the agronomic feasibility of this technology through different fungicide application intervals. The experimental design was a randomized block design with three replications, and the treatments were arranged in a factorial 4 x 4 (soybean cultivars x fungicides application forms). cultivars, FUNDACEP 66 RR ™ and NS 5000 RR PRO ™, which have no resistance to disease were used, and the TMG cultivars 7262 Inox ™ RR ™ and 7062 ™ Stainless Intact RR2 PRO ™, which have resistance to soybean rust. Four experimental treatments were used. In the first treatment (T1) called control was not carried out the application of fungicides, only insecticides as needed, based on the manifestation of insect pests in the production field, with the other treatments, insecticide insecticides throughout the experiment handled similarly. The second treatment (T2) consisted BENZOVINDIFLUPIR) at a dose of 200 grams per hectare of commercial product using spray application volume of 200 liters per hectare. The application was done at the beginning of the reproductive stage of culture time prior to the closing of sowing streets, where the leaves from the lower third of culture met with the line leaves of the plant next. The treatment management of the third (T3) is identical to T2, however application treatment interval was 21 days, following a fixed interval criterion, in the same way until the stage R5.4. Finally, management of the fourth treatment (T4) identical to the second and third treatments, leaving only without fixed scale application interval, following the application criteria according to inoculate pressure and expression of ideal conditions for the reproduction of the pathogen . The grain yield ranged from 1259.68 kg in the control treatment (T1) of the cultivar NS 5000 until 3297.96 kg in the treatment 4 cultivar TMG 7262. It identifies difference in productivity between the control treatment with the other, where there fungicide, in cultivars lacking the INOX ™ technology, Fundacep 66 and NS 5000. There was no statistical difference in the averages, depending on the application of fungicides and different application ranges, 14 or 21 days interval fixed, in cultivars with INOX Technology ™. Proving that the crop 2015/2016, at conditions similar to the experiment, the INOX ™ technology was efficient for soybean rust control soybean.