Fungi Associated With Tomato Wilt In The Tropical Humid Lowlands Of Southeastern Nigeria And Preliminary Evaluation For Disease Tolerance In The Crop

  • RC Wokocha Department of Crop Protection, Michael Okpara University of Agriculture, Umudike, PMB 7267 Umuahia, Abia State, Nigeria
  • Felicia Oparah Department of Crop Protection, Michael Okpara University of Agriculture, Umudike, PMB 7267 Umuahia, Abia State, Nigeria
Keywords: Fusarium wilt, tomato cultivars, tomato wilt, disease tolerance, tropical humid lowlands

Abstract

Isolations on potato dextrose agar (PDA) showed that the following fungi were frequently associated with naturally infected, wilted tomato plants in Umudike: Fusarium oxysporum, f.sp. lycopersici, F.solani, F.equiseti, F.acuminatum, Trichoderma viride, T.harzianum, Mucor hiemalis, Sclerotium rolfsii, Phoma lycopersici and Rhizopus microsporus. Evaluation of 10 tomato cultivars for disease tolerance indicated that Fusarium wilt, incited by Fusarium oxysporum f.sp. lycopersici, with an incidence of 80-100% and a severity index of 4.0-5.0, was the most important fungal disease of field grown tomato in the area. Pathogencity tests, employing the direct soil inoculation technique, showed that only isolates of F. oxysporum f.sp. lycopersici induced wilting in all tomato cultivars evaluated.
KEY WORDS: .
Global Journal of Agricultural Sciences Vol.3(1&2) 2004: 59-62
Published
2005-02-09
Section
Articles

Journal Identifiers


eISSN: 1596-2903