Integrated management of potato late blight (Phytophthora infestans (Mont) de Bary) through resistant varieties and fungicides in North Shewa, Ethiopia.

Potato production is limited due to late blight of potato. Field experiments were conducted to evaluate potato varieties and fungicides for the management of late blight. Three potato varieties and five fungicides including untreated control were arranged in a randomized complete block design in three replications at two research locations during the 2019 season. Disease severities, disease progress curves, disease progress rate, and tuber yield were significantly (P < 0.01) affected by potato varieties, fungicide applications, and their interactions at both locations. At Debre Berhan agricultural research center, the highest area under disease progress curve (AUDPC) value (948.8%-days) was computed from untreated control plots of Gudene variety while the lowest AUDPC value (223%-days) was computed from Gudene variety treated with Ridomil Gold. At Debre Berhan University research field, the highest (39.4 t ha⁻¹) yield was recorded from the Gera variety treated with Ridomil Gold. Farmers at both locations are recommended to use Gera variety treated with Ridomil Gold. [ABSTRACT FROM AUTHOR]