Survival of soil-borne fungus Phymatotrichopsis omnivora after exposure to volatile fatty acids
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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.
KeywordsBiological soil disinfestation Phymatotrichopsis Root rot Volatile fatty acids
We thank Dr. Momma for his suggestions and corrections of this paper.
- Momma N (2008) Biological soil disinfestation (BSD) of soil borne pathogens and its possible mechanisms. JARQ 42:7–12Google Scholar
- Muramoto J, Shennan C, Fitzgerald A, Koike S, Bolda M, Daugovish O, Rosskopf E, Kokalis-Burelle N, Butler D (2008) Effect of anaerobic soil disinfestation on weed seed germination. In: Proceedings of annual international research conference on methyl bromide alternatives and emissions reductions, Orlando, Florida, USA: 109.1–109.3. Methyl Bromide Alternatives Outreach, Fresno, CA, USAGoogle Scholar
- Samaniego-Gaxiola JA (2008a) Effect of pH on sclerotia survival of Phymatotrichopsis omnivora (Dugg.) Hennebert exposed to buffer solutions, acetic acid, and to NaOCl (in Spanish with English summary). Rev Mex Fitopatol 26:177–179Google Scholar
- Samaniego-Gaxiola JA (2008b) Effect of pH on survival of sclerotia of Phymatotrichopsis omnivora (Dugg.) Hennebert exposed to Tilt and Trichoderma sp. (in Spanish with English summary). Rev Mex Fitopatol 26:32–39Google Scholar
- Samaniego-Gaxiola JA, Ordóñez-Meléndez HJ, Pedroza-Sandoval A, Cueto-Wong C (2010) Relationship between the drying of the sclerotia of Phymatotrichopsis omnivora and its survival. Rev Mex Micol 32:49–58Google Scholar
- SAS Institute (1999) SAS/IML User’s guide, version 8. CaryGoogle Scholar
- Streets RB, Bloss HE (1973) Phymatotrichum root rot Monograph 8. APS Press, St. PaulGoogle Scholar