Rate determination of Bayleton fungicide against faba bean gall (Physoderma vaciae) disease at North Shewa, Amhara, Ethiopia

Abstract Faba bean gall (FBG) caused by Physoderma viciae is the most destructive disease of faba bean (Vicia faba L.) in Ethiopia, particularly in Amhara, Oromia and Tigray regions. Bayleten 25WP fungicide was evaluated as a seed dressi ng, foliar spray and their integration in order to select cost effective rate and method of application for the management of FBG. A total of eight treatments were considered for this field experiment. The trial was conducted at Mush farmers’ field laid out in RCB Design with three replications for two consecutive growing seasons in (2019 and 2020). The result showed significant differences (p < 0.05) amongst the treatments examined in terms of FBG severity and grain yield on growing seasons. Bayleton 25WP seed dressing was found effective method of fungicide application in reducing FBG disease severity over foliar spray and untreated check. In the meantime, it significantly increased grain yield (kg/ha). On top of this, the highest MRR (59.2%) was observed from faba bean seeds treated with Triadimefon 150 g per 100 kg seed. Therefore Bayleton 25WP seed treatment with Triadimefon 150 g per 100 kg seed was found cost effective rate and method of application than foliar application that reduced the disease pressure and increased grain yield. Hence, this finding should be demonstrated by participating formers in order to create awareness for faba bean growers in the study area who are challenging due to the disease.