In the present study the fungitoxic effect of the castor oil plant detergent (Ricinus communis) on the development of the phytopathogens Pyricularia grisea, Fusarium graminearum and Colletotrichum lindemuthianum was evaluated. Six concentrations of the detergent (12.5mL L-1 to 300mL L-1) had been, individually, incorporated to the Basal Medium. After fungi inoculations, the radial growth of mycelia were evaluated. Detergent at 50mL L-1 and 200mL L-1 inhibited completely the development of P. grisea and C. lindemuthianum, respectively. On the basis of the mycelial growth of F. graminearum, the fungitoxic activity of the castor oil plant detergent (DOM) determined inhibition in the range of 79.4 and 91% for the F2 race and 80.7 and 90.7% for the F4 race. Detergent at the concentrations of 100mL L-1 to 300mL L-1 inhibited in 100% the F. graminearum germination conidia (races F-4 and F-2). Results demonstrate the fungitoxic activity of the castor oil plant detergent on phytopathogenic fungi.
fungitoxic activity; fungus; castor oil; detergent
