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Commercial products from bio-active extractives in cypress milling residues.

Kennedy, M.J. and Astridge, D. and De Faveri, S. and Fay, H. and Firrell, M. and Grice, K. and Halfpapp, K. and Hargreaves, J.R. and Lyndal-Murphy, M. and Nolan, B. and Sharma, P. and Subramaniam, V. and Turner, L. (2008) Commercial products from bio-active extractives in cypress milling residues. Project Report. Department of Primary Industries and Fisheries, Queensland.

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Abstract

Extractive components obtained from milling residues of white cypress were studied for chemical identity and bioactivity with a view to developing a commercial use for these components, thus increasing the value of the residues and improving the economics of cypress sawn wood production. Extracts obtained by solvent or steam extraction techniques from cypress sawdust were each fractionated by a range of techniques into groups of similar compounds. Crude extracts and fractions were screened against a range of agricultural pests and diseases, including two fungi, subterranean termites, fruit spotting bugs, two-spotted mites, thrips, heliothis, banana scab moths, silverleaf whiteflies, cattle tick adults and larvae, and ruminant gastrointestinal nematodes. Additional screening was undertaken where encouraging results were achieved, for two-spotted mites, thrips, silverleaf whiteflies, cattle tick adults and ruminant gastrointestinal nematodes.

After considering degrees of efficacy against, and economic importance of, the agricultural pests, and likely production costs of extracts and fractions, the crude extract (oil) produced by steam distillation was chosen for further study against silverleaf whitefly. A useful degree of control was achievable when this oil was applied to tomato or eggplant at 0.1%, with much less harmful effects on a beneficial insect. Activity of the oil against silverleaf whitefly was undiminished 3.5 years after it was generated. There was little benefit from supplementing the extract with co-formulated paraffinic oil. From the steam distilled oil, fifty-five compounds were characterised, thirty-five compounds representing 92.478 % of the oil, with guaiol (20.8%) and citronellic acid (15.9%) most abundant. These two compounds, and a group of oxygenated compounds containing bulnesol and a range of eudesmols, were found to account for most of the activity against silverleaf whitefly. This application was recommended for first progression to commercialisation.

Item Type:Monograph (Project Report)
Funders:New South Wales Cypress Industry Strategic Plan., Forest and Wood Products Australia (FWPA)
Corporate Creators:Forest and Wood Products Australia (FWPA), Department of Employment, Economic Development and Innovation (DEEDI)
Projects:FWPA. PN04.2006
Business groups:Horticulture and Forestry Science
Additional Information:© The State of Queensland, Department of Primary Industries and Fisheries 2008. © The State of Queensland (Department of Employment; Economic Development and Innovation). Copyright protects this publication. Except for purposes permitted by the Copyright Act 1968; reproduction by whatever means is prohibited without prior written permission of the Department of Employment; Economic Development and Innovation. Enquiries should be directed to Commercialisation Unit SAFTRSCopyright@deedi.qld.gov.au or telephone the Business Information Centre on 13 25 23 (Queensland residents) or +61 7 3404 6999.
Keywords:Cypress; sawdust; extractives; bio-active; natural pesticide. Final report
Subjects:Forestry
Plant pests and diseases
Agriculture > Agriculture (General) > Agricultural economics
Deposited On:03 Apr 2012 05:51
Last Modified:15 Mar 2017 04:53

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