Yield Loss Assessment and Fungicides Valuation for the Control of Head Smudge (<i>Helmintosporium miyakei</i>) Disease of Tef in West Arsi Zone, Ethiopia

Tef head smudge disease caused by Helmintosporium miyakei is among the widely distributed tef in Ethiopia. Currently, an evaluation of different fungicides for control and yield loss quantification very crucial. Therefore, this study aimed to identify effective fungicide(s) quantify pathogen country. The experiment was conducted at Negelle Arsi on farmers’ field from 2020 2021 short rainy seasons. application created significantly levels severity varieties Boset Tesfa. two are susceptible enabled assessment effects grain yield, disease, during analysis variance revealed that there no statistically significant difference Rex Duo Nativo 300 SC but highest obtained through (2431.2 kg ha-1). fungicide efficacy 77.1 60.9% were fungicides, respectively. result maximum 55.8 50% prevented SC, It recommended based availability market cost farmers can apply either or controlling tef.