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Title:   Author  item
                                            HOITINK, HARRY - OSUitem
                                            MUSSELMAN, CAROL - OSUitem
                                            MOORE, TERRY - OSUitem
                                            Horst, Leonaitem
                                            Krause, Charlesitem
                                            ZONDAG, RANDY - OSU EXTENSIONitem
                                            MATHERS, HANNAH - OSU
  Submitted to: Extension Circular
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 12/1/2002
                                    Publication  Date: 1/20/2003
                                    Citation: Hoitink, H.A., Musselman, C.A., Moore, T.L., Horst, L., Krause, C.R., Zondag, R.A., Mathers, H. 2003. Biological suppression of foliar diseases of ornamental plants with composted manures, biosolids, and trichoderma hamatum 382. Extension Circular. 189:50-56.Interpretive Summary:
                                Technical Abstract: Composted dairy and swine manures and municipal biosolids were tested as amendments in nursery container media to determine their effects on plant growth and health. These composts when incorporated into nursery media at a volumetric amendment rates of 5-6 % suppressed root rots and provided excellent growth on all but one of 40 plant species tested. Viola, a low fertility crop which did not respond well initially, recovered later in the season. One batch of composted manure naturally suppressed a foliar disease as well. However, several other batches of composts, including several batches of composted dairy and swine manures and composted municipal biosolids tested in cooperating nurseries, did not suppress foliar diseases. Inoculation of these compost-amended media with Trichoderma hamatum 382, a biocontrol agent that induces systemic resistance to disease in plants, significantly reduced the severity of several different types of foliar diseases. In conclusion, inoculation of compost-amended container media with T. hamatum 382 suppressed root as well as foliar diseases and supported excellent growth of nursery stock.


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