Investigating the effect of several fungicides and non-chemical compounds on the control of leaf-stripe barley on different cultivars

Barley brown spot disease by the infecting agent of Pyrenophora graminea is one of the most important and common barley diseases in most parts of the world and Iran. The aim of this study was to investigate the field yield of several fungicides and non-chemical composition in the control of spotting disease on several barley genotypes with different levels of resistance during the crop year 2018-2019 in two Agriculture and Natural Resources Research Centers in Neishabour and Torogh (Mashhad). Factorial experiment in the form of a randomized complete block design with experimental factors including barley genotype in 5 levels (Yousef, Goharan, Sahra, Jolgeh and one line ABY-C95-12) and fungicide in 4 levels (control, oral TS one per thousand, half azalea one and a half per thousand, vinegar (1.5 /1000) + mustard (35 g / kg) were combined. Percentage of infected plants at harvest time was calculated and analyzed by Duncan test at 0.05% probability level. In combined analysis, the percentage of infection was affected by region, genotype, fungicide and genotype interaction in fungicide .ABY - C95-12 line with 3.86% contamination were in the first place and Yousef and Gohran genotype were in the second place. The study of mean comparisons showed that the percentage of infection in control plants and free-ranging treatment was at the highest rate and was equal to 2.95 and 3.10%. The use of vinegar and mustard reduced this trait to 2.59%. Among all genotypes, the percentage of infection decreased to a significant level when oral TS was used.