Avaliação da reação do girassol afetado com a ferrugem aplicando-se diferentes dosagens de silício

Abstract

The development of sunflower in Brazil has a somewhat problematic history in relation to diseases. The study evaluated the application of silicon as a beneficial agent for the crop, tending to increase production and resistance. Thus, the objective of this research was to evaluate the effect of applying silicon to an oxisol soil, and the reaction of Helianthus annuus (sunflower) that was being affected by rust (Puccinia helianthi). The study was carried out at the Instituto Federal Goiano Campus-Urutaí inside a greenhouse, consisting of four doses of silicon (0 (control); 0.75; 125; and 175 mg/dm3, applied every 15 days superficially, with four replications, in which all samples were divided with 50% and 100% irrigation to test their water stress. Metric evaluations were carried out on development, foliar and development evaluations, in addition to efficiency regarding the use of silicon by plants Through the data carried out by regression testing, we were able to analyze that there was no significant result for the application of silicon, however the stem was the only one that showed improvement in the application after twenty-one days after the first application of SI with a dosage of 175 mg / dm3, but it is not financially viable for the producer.