Atividade antagônica in vitro de isolados de Trichoderma spp. ao fungo Phytophthora citrophthora
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Data
2008-10-01
Autores
Silva, Katiane Santiago [UNESP]
Hojo Reboucas, Tiyoko Nair
Bomfim, Marines Pereira
Silva, Daniela Santiago
Sao Jose, Abel Reboucas
Sabin Benett, Cleiton Gredson [UNESP]
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Editor
Universidade Estadual de Londrina (UEL)
Resumo
Gummosis is among the main fungal diseases of the citrus. It is caused by Phytophthora sp. and usually shows up in the lap of the plant, provoking rottenness and gum exudation, and expands causing the plant death for constrictions in the cambium or phloem which interrupts the descending flow of sap. The objective of this work was to evaluate the antagonistic in vitro activity of Trichoderma spp. to the fungi Phytophthora citrophthora. Phytophthora citrophthora was exposed to five environments of antagonism (without antagonist and with four strains of Trichoderma viride, T. virens, T. harzianu and T stromaticum), The in vitro essay was accomplished through the method of paired cultures. A completely randomized desing was used with five treatments and three replications, and each plot was represented by three petri dishes. The isolates of Trichoderma demonstrated significant effect in the inhibition of the mycelial growth of the fungi Phytophthora citrophthora, and the fungi Trichoderma stromaticum presented larger antagonism to the fungi P. citrophthora while the T harzianum presented antagonism smaller.
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Palavras-chave
Gummosis, fungal diseases, citrus, biological control
Como citar
Semina-ciencias Agrarias. Londrina: Universidade Estadual de Londrina (UEL), v. 29, n. 4, p. 749-753, 2008.