Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 1
Written by Andreea-Raluca CHIRIAC, Stelica CRISTEA
The paper aims to present the results obtained concerning the effectiveness of fungicides in controlling the attack of Phomopsis/Diaporthe helianthi. Was followed the behavior of some sunflower hybrids against the attack, were applied solid fertilizers (urea 46% N) and liquids fertilizers in two doses (Last N 250 g/l N) on a constant agricultural fund N:P:K. and the pathogen was controlled by applying two fungicides, Sfera 535 SC (0.4 l/ha) and Tanos 50 WG (0.4 kg/ha). Regarding the hybrid ES JANIS, the fungicide Tanos (0.4 kg/ha) recorded the best value for the effectiveness, with a percentage of 95.56% in the fertilized plot with Last N (1 dose). In the case of the hybrid SY BACARDI CLP, in 2018, the fungicide Tanos (0.4 kg/ha) recorded the best value concerning the effectiveness, with a percentage of 92.27% in the fertilized plot with urea 46% N (90 kg/ha N a.s.). In 2019, both Sfera (0.4 l/ha) and Tanos (0.4 kg/ha) recorded the best values concerning the effectiveness, with a percentage of 94.10% in the fertilized plots with Last N (2 doses).
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