Two widely accessible media for growth and reproduction of Phytophthora and Pythium species

Article Abstract:

V8 vegetable juice agar (VJ agar) is the most commonly used medium for cultivating Phytophthora and Pythium species but is difficult to obtain outside the US. Two culture media based on widely accessible natural products were developed as an alternative to VJ agar. The newly developed media were based on tomato and soybean preparations, and comparative tests showed that they are comparable or even better than VJ agar in supporting the growth and both sexual and asexual reproduction of Phytophthora and Pythium species.

Microbiology, Culture media (Biology), Culture media, Cultures (Biology)

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Microbial properties of composts that suppress damping-off and root rot of creeping bentgrass caused by Pythium graminicola

Article Abstract:

Experiments are performed to evaluate the feasibility of using composts prepared from feedstocks in suppressing seedling and root diseases oc creeping bentgrass caused by Pythium graminicola. Results suggest that composts from feedstocks have microbial properties that help suppress Pythium graminicola diseases on creeping bentgrass. Composts from brewery sludge, Endicott biosolids and animal manures are the most suppressive of these materials.

Care and treatment, Analysis, Compost, Plant diseases, Diseases and pests, Grasses

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Fatty acid competition as a mechanism by which Enterobacter cloacae suppresses Pythium ultimum sporangium germination and damping-off

Article Abstract:

Mutants of Enterobacter cloacae that cannot metabolize fatty acids were unable to prevent the seed-rotting oomycete Pythuim ultimum from infecting cotton seeds. This shows that E. cloacae prevents plant disease by competing with P. ultimum for fatty acids.

Prevention, Fungal diseases of plants, Plant fungal diseases, Fatty acid metabolism

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