The Effect of Treatment of Tobacco Plant cv. Burley with Trichoderma harzianum Against Tobacco Black Shank Disease

                   Mahmoud Hasan(1), Ramez Mohammad(2) and Tarek Hasan* (1)

(1). Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(2). Department of Nutritive Science, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(*Corresponding author:  Tarek Hasan . E-Mail:

Received: 20/12/2018                                Accepted: 19/02/2020


This study showed the positive effect of treating tobacco plants burley variety by Trichoderma fungus Trichoderma harzianum as a stimulator of systemic acquired resistance against tobacco black shank disease caused by Phytophthora parasitica var nicotianae on some physical and chemical qualities of the dry burley leaves, and on the yield (fresh and dry weight) by irrigation and spraying methods. It was clear that best methods was by irrigation which increased the percentage of the apparent density of the dry leaves treated by T. harzianum reached to 40.55% compared with healthy control 26.37%, and the nicotine percentage reached to 1.78% compared by healthy control 1.95% , and gave less percentage of chloride 0.75% compared to healthy control 0.72% which is a positive quality, and increased the percentage of protein to 12.68% and the healthy control 11.43%, there were increased in the non-protein nitrogen (NPN) to 2.23% compared with healthy control 1.75%. The yield increased by treatment with T. harzianum by irrigation method which increased the average of fresh weight of leaves of one plant to 635.12 g compared with healthy control 395.56 g, and increased of the average of dry weight of leaves of one plant to 66.3 g compared with healthy control 41.4 g.

Kay Wards: Apparent Density, Nicotine. Chloride, Dry Weight, Trichoderma harzianum, Burley Tobacco Plant.

Full paper in Arabic: PDF