Fungicides efficiency on wheat diseases control in response to the application with different spray nozzles

This study aimed to evaluate the efficiency of fungicides to leaf control diseases of wheat, when applied to different models of spray nozzles. The experiment was conducted in a randomized block design with four replicates of factorial (4 x 3)+1. Data were subjected to analysis of variance and means compared by Tukey test at 5% probability. The fungicides used were: Opera (R) (pyraclostrobin+epoxiconazole) 0.75 L.ha(-1), Opera (R) 0.75 L.ha(-1) + Folicur (R) (tebuconazole) 0.3 L.ha(-1), Priori Xtra (R) (azoxystrobin+cyproconazole) 0.3 L.ha(-1), Priori Xtra (R) 0.3 L.ha(-1) + Tilt (R)(propiconazole) 0.3 L.ha(-1). These fungicides were applied with three models of spray nozzles jet planes: XR 11 001 (fine drop), AIRMIX 11,001 (average drop) and AVI 11,001 (coarse drop). We evaluated the incidence and severity (damage per plant leaf) of yellow spot (Drechslera tritici-repentis), spot blotch (Bipolaris sorokiniana), leaf rust (Puccinia triticina) and grain yield (kg.ha(-1)) culture. The results show that the application of fungicides for control of leaf diseases in wheat resulted in increases in grain yield, and yield higher values were observed with the application of Opera (R), using the XR 11001.