DESEMPENHO AGRONÔMICO, MORFOLÓGICO E BROMATOLÓGICO DA CULTIVAR DE TRIGO DUPLO PROPÓSITO BRS UMBU COM APLICAÇÃO FOLIAR DE FUNGICIDAS

Abstract

This study aimed to evaluate the efficiency of fungicides, alone or in combination, applied at different growth stages of wheat crop, and its effects on the control of foliar diseases on the parameters of morphological, agronomic characteristics in both crops 2012 and 2013, and evaluation of qualitative characteristics the wheat plants dual purpose BRS Umbu as hay only in 2012 crop. The experiment was conducted in Guarapuava-PR, in the field of the West Center State University (UNICENTRO), Campus CEDETEG, in 2012 and 2013 crops. Fungicides were studied: isolated triazole (Cyproconazole - 200 ml ha?¹), isolated strobilurin (Trifloxystrobin - 300 ml ha?¹), association (Trifloxystrobin + Cyproconazole - 200 ml ha?¹). The applications were performed at three times, vegetative stage (7 - Feekes Large, 1954), reproductive stage (10.5 - Feekes and Large, 1954) and in both vegetative and reproductive stages. The harvests evaluated positively influenced the number of tillers and number of spikes and the agronomic characteristic hectoliter weight in dual-purpose wheat BRS Umbu, in Guarapuava, PR. Fungicides applied in combination (triazole + strobilurin) reduced the CPF BRS Umbu, which are dependent on the assessed harvest. The harvests evaluated positively influenced the morphological characteristics of number of tillers and number of spikes and the characteristic agronomic hectolitre weight, cultivar BRS Umbu dual purpose wheat, in Guarapuava, PR. The fungicides applications alone and in association triazole and estrobirulina did not alter the morphological characteristics number of tillers; number of spikes; number of grains per spike and plant height of the cultivar BRS Umbu dual-purpose wheat. The application of fungicides association triazole + strobilurin applied in the vegetative stage of tillering increased grain yield compared individual applications of triazole and strobilurin in the season of 2013. The fungicide applications in growing seasons, reproductive and reproductive + vegetative, results in the highest grain yield when compared to the control treatment (no application). The chemical characteristic NDF was negatively influenced with the applications of fungicides in vegetative and reproductive stages compared to the control treatment. The single application of triazole in the reproductive stage increased hemicellulose and total digestible nutrients.