CRC50089: Grain Insect Ecology

This project will develop new approaches to the management of phosphine resistance, based on insights from grain insect pest ecology. The outputs of this project will provide a basis for further research. The research will produce preliminary data which will contribute to the development of strategies to minimise selection for resistance throughout the grain value chain, thereby prolonging the useful life of phosphine.

What is the biosecurity problem?

Resistance to phosphine in target pests threatens market access for Australian grain. While the grains industry is now attempting to develop an effective and sustainable strategy to manage this resistance, action is severely limited by significant gaps in our knowledge of the key ecological factors that influence the development of resistance. There is a need to research this information as a foundation for a rational approach to managing phosphine resistance in the Australian grains industry.

The main outputs of this project are to:

• develop methodologies and provide preliminary data on distribution, changes in insect abundance and movement of insects within grain ecosystems and the effect of these on phosphine resistance selection
  
  
• identify refuge beetles from selection
  
  
• develop further knowledge of the range of movement for beetle around farms
  
  
• create an initial mathematical model of the two-gene mediated high-level phosphine resistance, suitable for predicting the development and spread of resistance inside grain storages
  
  
• have reports published in peer-reviewed scientific journals, and
  
  
• develop written articles and other materials to support delivery of information to growers and other stakeholders.

Who will be the end-users of this research?

The key end-users will include scientists, Plant Health Australia and extension specialists. Grain-growers and bulk-handling companies are the major beneficiaries of this research. However, all enterprises engaged in the production, marketing, transport, handling and storage of grain in Australia will benefit from better management practices based on outputs from this project.