The scientists also believe that unlike with insecticides, where as many as 80% of mosquitoes are no longer killed by the compounds, the insects are unlikely to develop resistance to the fungus as it targets many different genes in the parasite.

BBC: NEWS | Health | Fungi 'new tool' against malaria

By planting in these areas, it is hoped that the young trees will be exposed to the fungus and can be monitored for signs of resistance.

BBC: Government to plant 250,000 trees to beat ash dieback