Title: Fusarium verticillioides: A new cotton wilt pathogen in Uzbekistan Authors
Submitted to: International Journal of Plant Disease and Pathology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: July 1, 2013
Publication Date: July 8, 2013
Citation: Marupov, A., Stipanovic, R.D., Turamuratova, G.H., Mambetnazarov, A.B., Marupova, M.A. 2013. Fusarium verticillioides: A new cotton wilt pathogen in Uzbekistan. International Journal of Plant Disease and Pathology. 1(1):1-5. Interpretive Summary: Uzbekistan cotton producers have experienced a decade of unusual wilt symptoms in fields throughout the country. From 2007 to 2011, Uzbek scientists collected samples from diseased plants in 24 regions throughout Uzbekistan. In addition to the endemic pathogen that causes Fusarium wilt, in Bukhara province they found that Fusarium verticillioides was also causing severe wilt in these plants. In laboratory tests, this pathogen was more aggressive than the endemic pathogen that causes Fusarium wilt.
Technical Abstract: An increase in wilt has been observed in cotton fields in Uzbekistan. This prompted us to conduct a survey of Uzbek cotton fields for wilt over a five year period beginning in 2007. Twenty-four regions with different soil types and ecologies were screened. In 9 regions, over 45% of the plants demonstrated wilt symptoms and over 60% of the plants showed wilt symptoms in 4 of these regions. During this screening, we identified a new pathogen affecting cotton in Bukhara province that was identified as Fusarium verticillioides (Sacc.) Nirenberg (Syn. F. moniliforme Sheld.). Identification was based on mycological studies and genetic analysis. In greenhouse studies, this pathogen was shown to be more aggressive on cotton than the Fusarium oxysporum f. sp. vasinfectum that is endemic to Uzbekistan, but is not more aggressive on tomato, potato, eggplant and pepper.