| influence of temperature on pythium splendens--induced root disease on carambola, averrhoa carambola. | a series of glasshouse and incubator studies were conducted to investigate the role played by pythium splendens in a decline disorder of carambola, averrhoa carambola. plants, 4-6 months old, were grown in native calcareous soil either infested or not infested with the pathogen. isolates recovered from atemoya, carambola and passion fruit grew optimally at 30 degrees c, and significantly (p < 0.05) increased root necrosis and reduced root, shoot and total biomass of carambola. temperature had a ... | 2004 | 15119860 |
| two widely accessible media for growth and reproduction of phytophthora and pythium species. | tomato agar and soybean agar were found to be comparable to or in some cases better than the popular v8 vegetable juice agar in supporting linear growth of phytophthora cactorum, phytophthora capsici, phytophthora parasitica, pythium aphanidermatum, and pythium splendens; sporangium production of p. capsici, p. palmivora, and pythium splendens; and oospore formation of p. cactorum, p. parasitica, pythium aphanidermatum and pythium splendens. these two media with readily accessible ingredients ca ... | 1993 | 16349002 |
| involvement of pyochelin and pyoverdin in suppression of pythium-induced damping-off of tomato by pseudomonas aeruginosa 7nsk2. | the plant growth-promoting rhizobacterium pseudomonas aeruginosa 7nsk2 produces three siderophores when iron is limited: the yellow-green fluorescent pyoverdin, the salicylate derivative pyochelin, and salicylic acid. this pseudomonas strain was shown to be an efficient antagonist of pythium-induced damping-off. the role of pyoverdin and pyochelin in the suppression of pythium splendens was investigated by using various siderophore-deficient mutants derived from p. aeruginosa 7nsk2 in a bioassay ... | 1996 | 16535275 |
| fungitoxicity of lyophilized and spray-dried garlic extracts. | among the compounds discussed for anti-microbial and anti-fungal use allicin (allylthiosulfinate, diallyl disulfide-s-monoxide), an active ingredient of garlic, has attracted considerable attention. the objective of this study is to determine the antifungal activity of a local garlic ecotype (voghiera) extracts against different pathogens. primary screening was carried out by the agar plates technique using ethanol garlic extract at four final concentrations against the following organisms: alte ... | 2007 | 17763036 |
| phenazines and biosurfactants interact in the biological control of soil-borne diseases caused by pythium spp. | in this study, the putative role of phenazines and rhamnolipid-biosurfactants, antagonistic metabolites produced by pseudomonas aeruginosa pna1, was tested in the biological control of pythium splendens on bean (phaseolus vulgaris l) and pythium myriotylum on cocoyam (xanthosoma sagittifolium l schott). a rhamnolipid-deficient and a phenazine-deficient mutant of pna1 were used either separately or jointly in plant experiments. when the mutants were applied separately, no disease-suppressive effe ... | 2008 | 18237310 |