Control del clavo de la guayaba con extractos de plantas

Extracts made by alcoholic maceration, showed the greatest inhibition of the growth of the P. clavisporafungus with respect to water maceration or infusion. In bioassays with alcoholic extracts concentrated with rotary evaporator and filtered, extracts ofjaral (Cistussp.), olives (Bidens odorataCav.), Mesquite (Prosopis laevigataHumb. & Bonpl. Ex Willd.), paradise (Melia azedarachL.), olive tree (Olea europaeaL.), trompillo (Solanum eleagnifoliumCav.), lantana (Lantanasp.), rosemary (Rosmarinussp.), rue (Ruta graveolensL.), venadilla (Bursera simaruba(L.) SARG.), cow tongue (Rumex crispusL.) and Australian eucalyptus (Corymbia (=Eucalyptus) gummifera(Gaertn.) Hill & Johnson) showed fungal growth reductions, greater than 90%. In the field, extracts of red eucalyptus plants (Eucalyptus camaldulensis) and Australian eucalyptus (Corymbia gummifera) showed less damage than chemical synthesis fungicides evaluated. The foregoing indicates that the use of these extracts isfeasible in the control of the P. clavisporafungus, reducing the environmental impact.