Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/9/2003
Publication Date: 8/9/2003
Citation: BONDE, M.R., BERNER, D.K., NESTER, S.E., PETERSON, G.L., OLSEN, M.W., CUNFER, B.M., SIM, T. SURVIVAL OF TILLETIA INDICA TELIOSPORES IN SOILS. AMERICAN PHYTOPATHOLOGICAL SOCIETY ABSTRACTS. 2003.
Technical Abstract: Karnal bunt of wheat, incited by T. indica, typically results in small reductions in grain quality and yield. However, because of its international quarantine status, it has the potential to cause large economic losses to wheat-exporting countries. To determine the potential for T. indica to survive in the U.S., a teliospore longevity study was initiated in Kansas, Maryland, Georgia and Arizona field plots. Soil from each plot was artificially infested and placed in mesh bags, and bags placed in the respective soils within special PVC pipes. The pipes then were buried vertically in the plots. Bags also were placed outside pipes in Arizona, and infested soil from each plot and pure spores were maintained dry in a laboratory. During the first 2 years, viability declined more rapidly in the field in pipes than outside pipes, and more rapidly in fields in Kansas and Maryland than Georgia or Arizona. In the laboratory over 3 years, viability decreased more rapidly in dry soil from Kansas and Maryland than Georgia or Arizona, while pure spores remained the same.