The influence of treatments with different phytosanitary products (fungicides) on the attack of some phytopathogenic fungi and on Barley harvest – Salmandre variety - in 2018 pedoclimatic conditions of The Eastern Baragan

Abstract

Barley is attacked during the vegetation period by many pathogenic agents. One of these pathogenic agents, Pyrenophora graminea fungus producing the barley’s leaf stripe (Velichi E. 2012) appeared in the Eastern Baragan area in 2018. An experiment took place in 2018, where 4 products of phytosanitary usage were used, as follows: ACANTO PLUS (picoxistrobin 200g/l + cyproconazole 80 g/l), MYSTIC 250 EC (tebuconazole 250 g/l) and FALCON 460 EC (triadimenole 43 g/l + tebuconazole 167 g/l + spiroxamine 250 g/l). This experiment consisted in 7 variants (6 variants with phytosanitary treatments in different combinations of products, plus one control variant not treated). The experiment was placed in Latin square. The 7 variants were placed in 7 repetitions. Among the pathogenic agents monitored, the greatest attacks were produced by Pyrenphora graminea fungus, which produces the tearing of barley’s leaves. The first two leaves below the spike were analyzed for this. The observations showed that the degree of attack (D.A %) of the disease (barley’s leaf stripe) was more reduced at all 6 variants of treatment than that of the control variant, V7. The harvests of the treated variants (V1 … V6) were higher than the harvest of the untreated control variant, V7. The harvests of treatment variants were significantly higher than the harvest of the untreated control variant (statistical assurance, LD 5%), except for V1, where the harvest increment has no statistical assurance. In what concerns the economic efficiency, like in the study performed in the year 2016, the fungicide product MYSTIC 250 EC 0.5 l/ha has proved to be the most efficient from price point of view.