Manejo de enraizador e fungicida em fundo de sulco na cana de açúcar

Abstract

One of the most important crops in world agribusiness, sugarcane represents 24% of the entire cultivated area on the globe. However, there are adverse factors that affect the crop, such as the incidence of pests and diseases and prolonged drought in the Northeast. Only in Brazil, 40 fungal diseases have been reported that reduce the sprouting by up to 47% and the productivity of the sugarcane field by 35%. Therefore, the use of fungicides and rooting agents on the genus Saccharum spp. has been evaluated, evaluating their influence on the physiological performance of the plant, obtaining positive and additional effects on the crop yield, presenting more homogeneous and healthy sugarcane fields. Thus, the present work aimed to evaluate the agronomic performance of sugarcane under the application of fungicide and stimulant (rooting) in the sugarcane varieties RB041443 and RB867515. The experiment was conducted in the experimental area (Chã do Jardim) from September 2020 to July 2021, and set up in a randomized block design with eight treatments of four replications, totaling 32 plots. The treatments were characterized by the spraying of the biological fungicide and the application of Enraizador isolated and together under the varieties RB867515 and RB041443. The characteristics evaluated in the field were stem height, number of tillers, number of internodes, stem diameters, degree brix and TCH. The data were submitted to Analysis of Variance (ANOVA) using the F test and subsequent test of means using the Scott-Knott criteria, at 5% probability. The results indicated a positive effect of the rooter on all variables, with emphasis on the TCH in RB867515 and stem diameter for RB041443. The fungicide, applied in isolation, did not present superior performance for the analyzed variables. However, its use in conjunction with the rooter, led to obtaining larger stem diameters for RB867515.