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- Title
Efficacy of Peanut Seed Treatments for Organic Management in Georgia.
- Authors
Tubbs, R. S.; Cantonwine, E. G.; Brenneman, T. B.
- Abstract
One of the most critical and influential factors determining ultimate crop success is plant stand establishment. Because synthetic seed treatments are not allowed in organic production systems, alternatives are needed to assist in resistance of pathogens during germination and seedling growth. Several biological control materials were evaluated in laboratory assays and field trials to determine their potential for minimizing disease impact and maximizing yield in organic peanut production. These included Bacillus subtilis and several application methods of copper sulfate. Bacillus subtilis demonstrated excellent control of Aspergillus in the laboratory, but this was not confirmed in the field. Copper sulfate had no benefit against Aspergillus, but had some activity against Rhizopus in the laboratory. When applied dry to the seed, copper sulfate improved plant stands and reduced postemergence plant mortality (damping-off) compared to either B. subtilis or untreated seed. When applied in combination with cola as a sticking agent, copper sulfate did an excellent job of minimizing damping-off, but caused delayed emergence or a reduced plant stand compared to all other treatments. Because there was no evidence of direct toxicity against A. niger by the copper sulfate treatments in the lab assay, the field effect may be the result of enhanced host resistance to Aspergillus crown rot, or activity on another pathogen.
- Subjects
PEANUT research; SEED treatment; BACILLUS subtilis; CAPTAN; COPPER sulfate
- Publication
Peanut Science, 2013, Vol 40, Issue 2, p149
- ISSN
0095-3679
- Publication type
Article
- DOI
10.3146/PS13-12.1