Assessing productivity gains for cattle grazing “Redlands” (R12) leucaena in northern Queensland

The productivity of leucaena pasture systems across Northern Australia is reduced by the leucaena psyllid (Heteropsylla cubana). All commercial leucaena varieties are susceptible to psyllid attack and depending on seasonal conditions such attacks will defoliate trees and limit plant growth. The new ‘Redlands’ variety with plant-based genetic resistance to the psyllid pest is the most appropriate solution to this issue however it’s performance under grazing is largely untested.

A 60ha fully replicated leucaena trial site will be developed at ‘Pinnarendi’ about 50km south-west of Mt Garnet in north Queensland. Half the site will be planted with Redlands and the balance to Wondergraze.

The project will be conducted in two phases. Phase 1 will cover the development and establishment of the leucaena trial site prior to the introduction of grazing animals. Phase 2 will document measures of animal productivity and will ideally commence towards the end of Phase 1; provided the trial is adequately established and a decision point is achieved.

When: 1 July 2015 to 30 June 2020

Where: Mareeba, Queensland

Contact: Craig Lemin E: craig.lemin@daf.qld.gov.au

Collaborators: Department of Agriculture and Fisheries

RD&E objectives: Enterprise sustainability: Increasing natural resource use efficiency and managed environmental impacts

Industry priorities: Grazing land management