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Development and field testing of a mycoherbicide for bracken control (extension to BD0506) - BD1224

Mycoherbicide formulations comprising spores of Ascochyta pteridis suspended in novel invert emulsions (consisting of vegetable oils, paraffin, water and surfactants) and amended with low concentrations (0.001—0.0001%) of the contact herbicide ioxynil have been shown to cause rapid death of bracken in the laboratory and significant infection in the field. In this study, the mycoherbicide formulations developed will be subjected to rigorous field testing in order to study its efficacy in bracken control; the degree of systemic movement of the fungus in the plant will also be investigated.

The study will be composed of 4 objectives described as follows, together with ways in which they might be achieved: 1. Evaluation of formulation efficacy using a twin-fluid sprayer prior to field trials to confirm optimisation of spore dose, droplet size, application rate and spray technique; 2. Implementation of field trials using immature bracken (which is most vulnerable to infection and easily accessible with spray apparatus) in a variety of climatic and edaphic situtations in the Scottish Borders and England; 3. Use of microscopy and re-isolation of the fungus to investigate the degree of its systemic movement in field- and laboratory-inoculated bracken with or without crushing of fronds prior to spraying; and 4. Testing of pathogenicity of further isolates of A. pteridis (via hill farmers etc. reporting incidences of diseased bracken).
Project Documents
• Final Report : Development and field testing of a mycoherbicide for bracken control (extension to BD0506   (78k)
Time-Scale and Cost
From: 1998

To: 1999

Cost: £25,213
Contractor / Funded Organisations
University - Strathclyde, Bioscience & Biotechnology
Fields of Study
Environmental Stewardship