Articles
BIOFUNCTIONAL COMPOSTS AND BIOTIZATION
Article number
631_31
Pages
243 – 251
Language
English
Abstract
Soilborne pathogens are difficult to control and the most effective soil fumigant, methyl bromide, is being withdrawn from use.
Here, a chitin-amended peat (Suppressor) was investigated as a selective growth substrate in the evaluation of a biological control strategy for soil-borne pathogens.
Results of the effects of Suppressor on Phytophthora fragariae (redcore) disease of Fragaria vesca and Fusarium disease of Dianthus in glasshouse trials are presented.
In a further experiment, the interaction between redcore and an arbuscular mycorrhizal fungi (AMF) inoculant was investigated.
Protective effects were seen in all crop models; in Dianthus, twice as many plants survived Fusarium inoculation in Suppressor compared with the control substrate; and in strawberry trials, when both AMF and Suppressor were present for a 4 weeks after acclimatization the strawberries were resistant to disease.
Suppressor enhanced lytic enzyme activity in the substrate and increased in planta defense proteins.
Suppressor was also evaluated for suppression of Sclerotinia storage rot of Jerusalem artichoke (Helianthus tuberosus). Artichoke tuber storage disease was reduced from 95% to 37% using a Suppressor tuber dressing.
Here, a chitin-amended peat (Suppressor) was investigated as a selective growth substrate in the evaluation of a biological control strategy for soil-borne pathogens.
Results of the effects of Suppressor on Phytophthora fragariae (redcore) disease of Fragaria vesca and Fusarium disease of Dianthus in glasshouse trials are presented.
In a further experiment, the interaction between redcore and an arbuscular mycorrhizal fungi (AMF) inoculant was investigated.
Protective effects were seen in all crop models; in Dianthus, twice as many plants survived Fusarium inoculation in Suppressor compared with the control substrate; and in strawberry trials, when both AMF and Suppressor were present for a 4 weeks after acclimatization the strawberries were resistant to disease.
Suppressor enhanced lytic enzyme activity in the substrate and increased in planta defense proteins.
Suppressor was also evaluated for suppression of Sclerotinia storage rot of Jerusalem artichoke (Helianthus tuberosus). Artichoke tuber storage disease was reduced from 95% to 37% using a Suppressor tuber dressing.
Authors
S.M. Rafferty, J.G. Murphy, A.C. Cassells
Keywords
arbuscular mycorrhizal fungi, biological control, chitin, chitinases, pathogenesis-related proteins, soil-borne diseases, storage diseases
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