Azanaw1*, A. Sintayehu2, T. Alemu3 and T. Tesfaye1
(1) Gondar Agricultural Research Center, Addis Ababa, Ethiopia; (2) University of Gondar, Addis Ababa, Ethiopa; (3) Addis Ababa University, Addis Ababa, Ethiopia.
Pages 48-54
Welcome to Arab Journal of Plant Protection
eSSN 2412-5407
pISSN 0255-982X
Efficacy of Tilt (Propiconazole) Fungicide Applied at Different Rates and Growth Stages Against Spot Form Net Blotch Disease caused by Pyrenophora teres f. sp. maculata on Food Barley in North Gondar Zone, Northwestern Ethiopia
https://doi.org/10.22268/AJPP-001379 
Download PDF Abstract
Spot form net blotch (SFNB) is one of the diseases which causes yield loss in barley. This study was initiated to evaluate the efficacy of Tilt fungicide application for the control of the spot form net blotch. Three Tilt rates applied at four growth stages were evaluated using factorial randomized complete block design at four sites with three replications in North Gondar province during 2023. Susceptible local variety Abat Gebs was sown at a rate of 100kg/ha in 3m2 plot size. NPS Fertilizer at a rate of 121 kg/ha at planting, and urea at a rate of 100 kg/ha in two applications were used. Data on disease severity, yield and yield components were recorded. Analysis of variance of severities and area under disease progress curve, yield and yield components revealed that there was no interaction effect between fungicide rates and growth stages. There were statistically significant (P ≤ 0.05) differences in the area under disease progress curve when the fungicide was applied at different growth stages. The lowest area under the disease curve was obtained when the fungicide was sprayed at the 39 growth stage at Debark and Dabat. The highest grain yield (4455.9 and 4377.7 kg/ha) was obtained from plots sprayed with Tilt at 39 growth stage followed by 49 growth stage at Debark. In general, 18.2 and 20.4% yield advantage was obtained from plots sprayed at the 39 growth stage compared to unsprayed control plots at Debark and Dabat, respectively. The severity of net blotch was highly reduced following foliar application of Tilt fungicide at the rate of 0.5 L/ha sprayed at the 39 growth stage. Therefore, this fungicide rate and the mentioned time of application are proposed to be integrated into the cultivation package of food barley.
Keywords:
Barley, Tilt, fungicide, application rate, growth stage, grain yield.