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Survival of soil-borne fungus Phymatotrichopsis omnivora after exposure to volatile fatty acids
- Samaniego-Gaxiola, José Alfredo, Balagurusamy, Nagamani
- Journal of general plant pathology 2013 v.79 no.2 pp. 105-109
- Phymatotrichopsis omnivora, agar, fungi, mycelium, propionic acid, sandy soils, sclerotia, volatile fatty acids
- Control of plant-pathogenic Phymatotrichopsis omnivora is difficult. In tests of volatile fatty acids (VFAs), mycelia in empty 9-cm Petri dishes with 3 or 6 μL of acetic, butyric, formic or propionic acid did not grow, but 37–67 % grew on potato dextrose agar with 6 μL VFA. Survival of sclerotia was <20 % on water agar with 154 μg/mL of a VFA or 12–40 % in sandy soil with 616 μg/mL. Survivability after 2-h immersion in 17 mmol/L varied greatly (0–100 %) depending on the VFA, but in 33–50 mmol/L, 0 % survived. This fungus was thus susceptible to VFAs.