Prospects of biological control of Phytophthora root rots of woody perennials with antagonistic fungi

Tsao P.H., . (1990) Prospects of biological control of Phytophthora root rots of woody perennials with antagonistic fungi. [Proceedings Paper]

Although research activities on biological control of soilborne fungal diseases have increased dramatically in recent years control of Phytophthora by antagonistic hyphomycetous fungi has remained largely unexplored. Our studies in recent years have shown that several species of Aspergillus Penicillium and Trichoderma which exhibited in vitro antagonism can be effective in suppressing Phytophthora root rot of azalea and sweet orange. In greenhouse pot experiments under proper conditions the severity of azalea root rot caused by Phytophthora cinnamomi or P.parasitica P.nicotianae and citrus root rot caused by P.citrophthora or P.parasitica was reduced when Penicillium funiculosum grown in a bran/peat mixture was incorporated into a peat/perlite planting medium prior to Phytophthora inoculation. Aspergillus flavus Trichoderma harzianum and some other hyphomycetes were also effective in some tests. Several Aspergillus and Penicillium species also suppressed bark infection gummosis on stems of sweet orange or lemon by reducing the size of lesions caused by P.citrophthora or P. parasitica. These promising data have provided optimism for the prospects of effective biocontrol of Phytophthora root rot and crown rot of woody perennials in an integrated management sytem in the nursery

Full text available from:

Abstract

Although research activities on biological control of soilborne fungal diseases have increased dramatically in recent years control of Phytophthora by antagonistic hyphomycetous fungi has remained largely unexplored. Our studies in recent years have shown that several species of Aspergillus Penicillium and Trichoderma which exhibited in vitro antagonism can be effective in suppressing Phytophthora root rot of azalea and sweet orange. In greenhouse pot experiments under proper conditions the severity of azalea root rot caused by Phytophthora cinnamomi or P.parasitica P.nicotianae and citrus root rot caused by P.citrophthora or P.parasitica was reduced when Penicillium funiculosum grown in a bran/peat mixture was incorporated into a peat/perlite planting medium prior to Phytophthora inoculation. Aspergillus flavus Trichoderma harzianum and some other hyphomycetes were also effective in some tests. Several Aspergillus and Penicillium species also suppressed bark infection gummosis on stems of sweet orange or lemon by reducing the size of lesions caused by P.citrophthora or P. parasitica. These promising data have provided optimism for the prospects of effective biocontrol of Phytophthora root rot and crown rot of woody perennials in an integrated management sytem in the nursery

[error in script]

Item Type:	Proceedings Paper
Additional Information:	Summary En
AGROVOC Term:	PLANTAS LENOSAS
AGROVOC Term:	CONTROL BIOLOGICO
AGROVOC Term:	PODREDUMBRE DE LA RAIZ/ PHYTOPHTHORA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:26
URI:	http://webagris.upm.edu.my/id/eprint/15290

Actions (login required)

View Item