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Research Journal of Parasitology
Year: 2007  |  Volume: 2  |  Issue: 1  |  Page No.: 32 - 38

Frequency of Fusarium oxysporum F. sp. niveum and F. solani F. sp. Cucurbitae from Watermelon Seeds and Their Effect on Disease Incidence

N. Boughalleb and M. El Mahjoub    

Abstract: Isolation from watermelon seeds from six commercial seed companies demonstrated the presence of F. oxysporum f. sp. niveum (Fon) and F. solani f. sp. cucurbitae (Fsc). Both fungi were detected internally, but predominantly externally. Isolation results showed that seed infestation level had a significant effect on subsequent disease incidence. Some seedlots were heavily infested with Fsc and Fon, resulting in a combined disease incidence of more that 50%. However, seed isolations resulted in a poor prediction of the resulting disease incidence when the seeds were planted. This is the first documentation that Fsc is seed-transmitted in watermelon.

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