Anti-Contamination of Pathogenic Fungi on Post-Harvest Wheat Grains

Mohamed, Somaya; Abd-El-Aziz, Shadia; Naffa, Azza

doi:10.21608/ejp.2014.95593

Anti-Contamination of Pathogenic Fungi on Post-Harvest Wheat Grains

Document Type : Original Article

Authors

Plant Pathol. Res. Inst., A.R.C., Giza, Egypt

10.21608/ejp.2014.95593

Abstract

During growing seasons of 2012 and 2013, wheat plants were treated 30-day pre-harvesting, with three salts, i.e. sodium
chloride, potassium chloride and sodium metasilicate and three antioxidants, i.e. salicylic acid, humic acid and ascorbic acid as well as four essential oils, i.e. garlic, thyme, cumin and eucalyptus, and the fungicide Tilt. Harvested grains were evaluated for contamination with Alternaria alternata, Aspergillus niger and A. flavus during storage at 20±5oC for six months. Results showed that all treatments significantly decreased the endograins contamination during storage. The highest efficacy was induced by garlic, sodium metasilicate, cumin and potassium chloride compared with the check treatment. Grains contamination (%) in oils treatments ranged from 0.0 to13.3, meanwhile it was 3.33 to 23.33 for salts and 7.77 to 17.77 for antioxidants. Also, results showed that the crude fungal filtrates of the three fungi completely inhibited the roots linear growth compared with the untreated check. Moreover, germination of grains treated with the three dilutions of fungal filtrates (1:1, 1:2 and 1:3) recorded 22.2, 55.5 and 88.8% with A. flavus and 33.3, 55.5, 88.8% with A. niger as well as 33.3, 44.4, 88.8% with A. alternate, respectively.

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