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@article{H._H._Armengol_2011, title={Population dynamics of Fusarium oxysporum f.sp. niveum and F. solani f.sp. cucurbitae in commercial watermelon fields in Tunisia}, volume={1}, url={https://www.updatepublishing.com/journal/index.php/ripb/article/view/2581}, abstractNote={Experiments were conducted in field plots to evaluate the level and the dynamic population of <em>Fusarium </em>species propagules of in three commercial watermelon fields inTunisia surveyed two successives years. Populations of <em>Fusarium oxysporum</em> f. sp. <em>niveum </em>and<em> F. solani </em>f. sp. cucurbitae in naturally infested fields of watermelon were enumerated by soil dilution method and subsequent pathogenicity tests. The results showed that <em>Fsc </em>colonies number recovered from the field soils was higher than the value of <em>Fon </em>colonies,in each field and for the two years. Before planting, the density of <em>Fsc </em>propagules in thefield soils was higher than the number of <em>Fon </em>colonies, in each field and for the two years.It varies from 193 to 128 propagules/g soil for the 1st year and between 986 to 568propagules/g soil in the 2nd year for field II. The highest inoculum density of <em>Fsc </em>was found at Field II (986.67±172.09 CFU g-1 soil) during the 2nd year, before plantation. Pathogenicity test revealed that for pathogens isolated from the deep 20-30 cm, the number of pathogenic colonies is relatively lower and counted between 40 to 70%.}, number={3}, journal={Research in Plant Biology}, author={H., Boughalleb-M’Hamdi and H., Chikh-Rouhou and Armengol, J.}, year={2011}, month={Aug.} }