On-farm demonstration of fungicide for the control of chocolate spot (Botrytis fabae L.) on faba bean in Bale zone, Ethiopia

Abstract

Faba bean (Vicia faba L.) is one of the most important food legumes in the world and in Bale-highlands as well. The experiment was executed for one year at Goba and Dinsho districts with the objectives of demonstrating different fungicide for the control of chocolate spot on faba bean and to give awareness on the use and effectiveness of the fungicide against chocolate spot on faba bean. The experiment was conducted using one faba bean varieties; Moti and two fungicide Mancozeb 80% (2.5 kg/ha) and Odeon 825 WG (2.5 kg/ha). The highest mean chocolate spot severity index recorded was 55% on unsprayed plot and the minimum mean chocolate spot severity index was recorded on Odeon 825 WG sprayed plot 27.5% severity at Goba district. Mancozeb 80% WP sprayed plots gave higher yield 2680 kg/ha and 2490 kg/ha at both locations as compared to Odeon 825 WG and unsprayed plots. Maximum percent of seed yield was increased over check by Mancozeb 80% WP 34.33% at Goba. Mancozeb 80% WP sprayed plot provided the highest gross returns (birr 40,200/ha) and 37,350/ha at Goba and Dinsho, respectively. The lowest gross return was computed from untreated check at both locations. The plot sprayed with Mancozeb 80% WP gave the maximum net return and also gave the highest benefit cost ratio at both locations. Farmers and others stakeholders can use these fungicides by integrating with other option to maximize their production and productivity as well as quality.