A survey on incidence and severity of citrus gummosis caused by Phytophthora species in Zoba Anseba, Eritrea

A survey was conducted on randomly selected three citrus plantations within the nine administration regions of three sub zobas of Zoba Anesba from November, 2014 to April, 2015 for the period of 5 months. All the three citrus species viz. orange, lemon and mandarin surveyed in growing regions of Zoba Anseba viz. Elabred, Hagaz and Hamelmalo. During the survey, it was found that crop was severely infected by citrus gummosis. Citrus crops orange, lemon and mandarin showed highest/maximum incidence of foot rot in Hagaz, i.e. 81, 91.5 and 80.6 per cent and the lowest/minimum incidence was found in Hamelmalo i.e. 52.7, 30.1 and 59.8 per cent respectively. It was observed that the highest disease severity was noted in Hagaz region and the lowest was recorded in sub-region Elabered. The lemon crop showed significant difference in incidence among the citrus species and also Hagaz was found the significantly different from other citrus growing areas.