| Abstract Detail
Plant Protection Schisler, D.A. [1], Slininger, P.J. [1], Miller, Jeff S. [2], Woodell, L.K. [3]. Gram negative bacteria for reducing pink rot, dry rot, late blight and sprouting on potato tubers in storage. PINK rot of potato, incited primarily by Phytophthora erythroseptica, is a disease of importance in many potato growing regions of the world including North America. The primary mode of entry by the pathogen into tubers in storage is via wounds or eyes; surfaces that theoretically could be protected using microbial antagonists. In previous research conducted at the NCAUR, ARS, Peoria, IL, we isolated 18 microbial strains from soils suppressive to dry rot and demonstrated the efficacy of strains of Pseudomonas, Enterobacter, and Pantoea in reducing dry rot (Phytopathology 87:177-183), late blight (Phytopathology 94:S96) and sprouting (Bio. Sci. Tech. 13:477-494) on tubers in storage. U.S. patents have been obtained regarding the strains and their use. However, these strains have not been tested for efficacy against pink rot until now. Ten of these strains were grown in a semidefined liquid medium at 25 C for 48 hours, diluted to a concentration of approximately 3 x 108 cfu/ml, individually combined with sporangia of P. erythroseptica, and the mixed microbial suspension used to inoculate shallow puncture wounds on tubers of cultivars Russet Burbank and Russet Norkotah. Preliminary results indicate that several of these strains reduce pink rot under bioassay conditions and that potato cultivar may influence the relative efficacy of individual biocontrol strains. The possible role of these strains as part of an integrated management program to reduce potato storage maladies will be discussed.
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1 - National Center for Agricultural Utilization Research, USDA-ARS, 1815 N. University Street, Peoria, IL, 61604, USA
2 - University of Idaho, Plant, Soil, and Entomological Sciences, 1693 South 2700 West, PO Box 870, Aberdeen, Idaho, 83210, United States of America
3 - Kimberly Research & Extension Center, University of Idaho, 3793 North 3600 East, Kimberly, ID, 83341, USA
Keywords:
biological control
pink rot
Phytophthora erythroseptica
.
Session: Poster-7
Location: Ballroom CD/Monona Terrace
Date: Tuesday, July 25th, 2006
Time: 8:00 AM
Abstract ID:181 |
