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Phytophthora and Pythium in Pot Plant Cultures Grown on Ebb and Flow Bench with Recirculating Nutrient Solution
Author(s) -
Thinggaard K.,
Middelboe A. L.
Publication year - 1989
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1989.tb01079.x
Subject(s) - pythium , biology , phytophthora , zoospore , oomycete , botany , pythium aphanidermatum , phycomycetes , phytophthora cactorum , horticulture , biological pest control , microbiology and biotechnology , inoculation , pathogen , spore
The occurrence of pythiaceous fungi in pot plant cultures grown in ebb and flow bench systems was investigated monthly from May to December, Phytophthora, Pythium and Saprolegnia (in all 351) were isolated from water samples and identified. Nearly all the isolates of Pythium produced zoospores in water. A pathogenicity test involving 15 isolates of Pythium “group P”, and 7 of Pythium “group F” showed that 73 % were pathogenic on cucumber, 66 % on Gerbera , 59 % on lettuce, 50 % on tomato, and 32 % on cress. Control of Pythium and Phytophthora is important in order to improve the health of plants grown in ebb and flow systems.