In Vitro Influence of Selected Fungicides on Sphacelotheca Reiliana and Ustilago Maydis
The study evaluates the effects of selected fungicides on radial mycelial growth and the germination of teliospores and sporidia in two species. The influence of fungicides on the growth of the same developmental forms of both fungi varied at times. Germination of teliospores Ustilago maydis in all used concentrations completely inhibited the fungicides: benomyl, carboxin and thiram, flusilazole.
Complete inhibition the germination of teliospores and sporidia Sphacelotheca reiliana caused grapefruit extract, benomyl, carboxin and thiram at concentrations of 10,000 to 100 mg/ml and azoxystrobin, flusilazole at concentrations of 10,000 to 1,000 mg/ml. Inhibition of mycelial growth of both species by the fungicides used was weaker than the inhibition the germination of teliospores and sporidia.
Aitchison J., Greenacre M. 2002. Biplots for compositional data. Appl. Stat. 51 (4): 375-392.
Gabriel K.R. 1971. The biplot graphic display of matrices with application to principal components analysis. Biometrics 58 (3): 453-467.
Fullerton R.A., Scott D.J., Graham G.J. 1974. Effects of fungicides on the control of head smut of maize, and the relationship between infection level and crop yield. New Zealand J. Exp. Agric. 2: 177-179
Markoglou A.N., Ziogas B.N. 2000. Genetic control of resistance to tridemorph in Ustilago maydis. Phytoparasitica 28 (4): 349-360.
Reuveni M., Sheglov D. 2002. Effects of azoxystrobin, difenoconazole, polyoxin B (polar) and trifloxystrobin on germination and growth of Alternaria alternata and decay in red delicious apple fruit. Crop Protect. 21: 951-955.
Shurtleff M.C. 1973. Compendium of Corn Diseases. The APS Press, St. Paul, MN, USA, 64 pp.
Slawecki R.A., Ryan E.P., Young D.H. 2002. Novel fungitoxicity assays for inhibition of germination-associated adhesion of Botrytis cinerea and Puccinia recondita spores. Appl. Environ. Microbiol. 68 (2): 597-601.
Tillman R.W., Sisler H.D. 1973. Effect of chloroneb on the growth and metabolism of Ustilago maydis. Phytopathology 63: 219-225.
Wrighta P.J., Fullertonb R.A., Koolaardc J.P. 2006. Fungicide control of head smut (Sporisorium reilianum) of sweetcorn (Zea mays). New Zealand J. Crop Hortic. Sci. 34 (1): 23-26.
Zeng D., Mei X., Wu J. 2010. Effects of an environmentally friendly seed coating agent on combating head smut of corn caused by Sphacelotheca reiliana and corn growth. J. Agric. Biotechnol. Sustainable Development 2 (6): 108-112.
Ziogas B.N., Markoglou A.N., Tzima A. 2002. A non-Mendelian inheritance of resistance to strobilurin fungicides in Ustilago maydis. Pest Manage. Sci. 58: 908-916.