Muhammad E.H. Ahmed, Muhammad A.G. Kararah, Khairy A.M.M. Abada, Hala. A.M. Eldakar


Many fungal pathogens were isolated from tomato roots of plants appearing wilt symptoms. Fusarium oxysporum (FO) isolates were selected, purified, tested for their pathogenicity and identifying the formae speciales of the highest virulent one. Among the 17 isolates, 9 isolates caused root-rot, 5 resulted in wilt symptoms and 3 were un-pathogenic. The highest virulent isolate of FO, specialized in causing tomato wilt, was then named Fusarium oxysporum Schlect f. sp. lycopersici (FOL). Significant reduction to the linear growth and conidial germination of FOL was obtained by the culture filtrate of Trichoderma bioagents, compost tea, and the non-pathogenic isolates of FO in comparison with control treatment. The bi-combination of Trichoderma asperellum (TA), T.harzianum (TH), cow dung compost (CDC), and the un-pathogenic isolate of FO lowered the infection by the disease and increased crop parameters significantly. However, fungicide Maxim was the superior treatment in lowering the severity of the disease and increasing crop parameters. Total phenolic compounds, photosynthetic pigments and vitamin-c considerably increased in tomato plants of Trichoderma treated plants, compost and un-pathogenic isolate of FO compared to the control.


Tomato; Compost; Fusarium wilt; Disease control; Trichoderma bioagents; Fruit yield; Maxim Phenolic compounds; Photosynth's pigments; Vitamin-C.

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