<i>Callistemon Citrinus, Cymbopogon Citratus, and Oxalis Barrelieri </i>Extracts Stimulate Defence of Tomato Against <i>Fusarium</i> Wilt

In Cameroon, tomato yields remain low due to attacks by pathogens and insects. Fusarium oxysporum f.sp. lycopersici (FOL) is a fungus responsible for wilt, disease important economic losses. To contribute the control of this pathogen, stimulatory effect defence system extracts plants in tomato/FOL interaction was evaluated. Tomato were treated with aqueous (AE) Callistemon citrinus (C. citrinus), Cymbopogon citratus citratus), Oxalis barrelieri (O. barrelieri) at 10% (W/V). After 4 days spraying extracts, inoculated virulent strain lycopersici (FOL) pots experiments. roots used determine contents phenols, proteins, carbohydrates, amino acids (AA) proline. The activities antioxidant enzymes evaluated: ascorbate peroxidase (APX), catalase (CAT), guaiacol (GPX) superoxide dismutase (SOD). results showed that treatment their infection FOL induced an increase lipids, proline roots, APX, GPX, SOD reduction CAT activity. Our suggest enzymatic activities, synthesis some metabolites could mitigate oxidative damage takes place during expansion pathogen. Aqueous C. citrinus, O. be as natural products stimulate against FOL.