Twenty sorghum seed samples were collected in 2015 from sorghum fields in southern region of Saudi Arabia and investigated for seed-borne fungi. Thirteen fungal genera and twenty-one fungal species were recorded on sorghum seeds using agar plate technique. Fusarium verticillioides was the most common pathogenic fungus in the present survey. In a trial to find out dual-purpose microorganisms, which able to stimulate sorghum growth and control its pathogens with friendly environmental impact 6 species of Trichoderma were evaluated. One of them was selected and identified as T.

The Sclerotium tuber rot fungus (Sclerotium rolfsii Sacc.) represents a serious problem for Jerusalem artichoke (JA) tubers during storage periods. The aim of this study was to investigate an alternative preservation method using a natural essential oil to inhibit the fungal growth, increase storability, and keep nutritive value of JA tubers under storage conditions. In vitro antifungal activity was assessed using two essential oils; caraway and spearmint at concentrations of 2, 3, 4 and 5 %.

White mold, caused by Sclerotinia sclerotiorum (Lib.) de Bary, is the most globally significant disease of Jerusalem Artichoke (JA) causing considerable losses during storage periods. The aim of this study was to evaluate the use of a natural essential oil for control of white mold disease, sprouting suppression and quality maintaining of JA tubers under storage periods. In vitro fungitoxicity was investigated using two natural essential oils; clove and sweet wormwood at concentrations of (2, 3, 4 and 5%). Clove oil at 2% inhibited completely the fungal growth of S. sclerotiorum.