Survey of Mango Anthracnose in Southern Ethiopia and In-Vitro Screening of Some Essential Oils against Colletotrichum gloeosporioides

Abstract

Experiments were conducted to assess the importance of anthracnose in South Ethiopia, characterize isolates of Colletotrichm gloeosporioides, and evaluate the efficacy of essential oils against the pathogen. In 2010, anthracnose incidence and severity were 37–57% and 16–31%, respectively. In 2011, disease incidence ranged from 33% to 65% while severity varied between 17% and 35%. Disease incidence and severity were 77% and 46%, respectively, during market surveys. Mean colony diameters of isolates were 38.6, 48.9, and 51 mm after 48 h of growth at 20, 25, and 30°C, respectively. Oils from Palmarosa and White cumin caused 100% inhibition of fungal growth.