Student and University

Beibei Li, Kansas State University (Kansas, USA)

Beibei is now working as a Research Assistant at KSU.




The development of resistance to phosphine over the past 10-15 years in selected stored grain insects threatens both Australian and global grain industries. This project aimed to develop alternative approaches to reduce reliance on, and extend the use of phosphine using chlorine dioxide and ozone for controlling phosphine-resistant insects in on-farm and commercial bulk storages. Importantly we aimed to develop alternatives that are both cost effective and residue free and that are effective across all life stages of the insects.  

Project Summary

We conducted laboratory trials to establish baseline concentration and exposure times of grain to chlorine dioxide and ozone, to achieve effective grain disinfestation. Field studies, pilot- and full-scale trails, were conducted with industry partners in both the United States and Australia. In both field and laboratory settings grain quality was evaluated after fumigation. The research builds on previous research efforts at Kansas State University and CRCNPB.

The project has produced methods, outlining both the costs and efficacy of alternative treatments compared to phosphine. Based on the above learnings we have developed technologies and best management practices which will be made available to the grains industry in Australia and the United States and will be applicable to other grain producing countries. 

PhD Supervisors

  • Professor Bhadriraju Subramanyam  (Kansas State University, USA)