Noun
a disease of plants characterized by the gradual dying of the young shoots starting at the tips and progressing to the larger branches
Source: WordNetThe Dark Age world had all kinds of potential issues that might bother Anita Atkinson: climate crisis, state collapse, financial ruin, mass extinction, catastrophic population dieback. None of those things bothered Anita, though, because she didn't understand long words. Bruce Sterling
For example, in southwestern Australia Banksia often occurs as an understorey to forests of Jarrah (Eucalyptus marginata), another species highly vulnerable to dieback. Source: Internet
Some evidence suggests that phosphorous acid may inhibit proteoid root formation. citation Because dieback thrives in moist soil conditions, it can be a severe problem for Banksias that are watered, such as in the cut flower industry and urban gardens. Source: Internet
Many walking tracks in the Waitakere Rangers have been closed to the public, to try and reduce the spread of Kauri Dieback. Source: Internet