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Polymer adhesives & colourants used in preinoculated legume pasture seed
Summary Materials used for seed pelleting have been found to be incompatible with rhizobia and potentially the major cause of poor microbiological quality of preinoculated seed. This project aims to survey products available for seed coating and evaluate their potential for improving rhizobial survival.
Commercially available polymer adhesives, colourants, agrochemicals (insecticides, fungicides) and micronutrients used in preinoculated pelleted seed will be collected throughout Australia. It is envisaged that this will be done with the cooperation of the seed pelleting companies, the inoculant manufacturing industries and manufacturers who produce the various products.
At the commencement of each year of the project, companies will be invited to supply materials that they use or which have a potential to be used in seed pelleting production. These products will be tested for their compatibility with several rhizobial strains (used to inoculate pastures) both in vitro and on seeds.
Once the compatibility tests with rhizobia have been completed, those products which are rated as compatible will progress to the next stage to determine their suitability when combined with other ingredients. A suitable dilution application rate for products with poor compatibility will be determined. If a satisfactory application rate can be established, these products will also be assessed in combination with other ingredients. Products which are highly deleterious to rhizobia will be classified as such and given a noncompatibility rating.
At the completion of the project, a risk analysis will be carried out using the results of the compatibility assessments. Materials will be rated according to their suitability for use in the seed pelleting process containing rhizobia.
Program Pasture Seeds
Research organisation NSW Department of Primary Industries, an office of the Department of Industry, Skills & Regional Development
Objective summary 1. To survey the available commercial polymers, colourants and other materials used in legume pasture seed inoculation and rate their compatibility with rhizobia.
2. To assess commercially available polymers for their ability to protect rhizobia from the adverse effects of desiccation and hence improve survival of rhizobia on preinoculated legume pasture seed.
3. To publish the results and conduct a workshop to provide commercial seed pelleters with a decision tool for the selection of suitable materials for seed preinoculation
4. Establishment of a quality control system for the ongoing monitoring of commercial preinoculated seed products.
Project Stage Closed
Project start date Friday, June 12, 2009
Project completion date Thursday, December 20, 2012
Journal articles from project Not Available
National priority Frontier technologies for building and transforming Australian industries
Rural priority Advanced Technology
RIRDC goal PSE-Improved alignment between industry objectives and Research and development outcomes
Principal researcher Greg Gemell
Research manager Michael Beer
Admin contact Cara Brooks