Pest and Diseases

By Denis Crawford –

Galls are abnormal growths that can form on just about any part of a plant. Why do galls form and do they harm the plants they form on?

Galls form in response to a variety of organisms entering plant tissue in some way.… Continue reading

By Denis Crawford –

Recent media reports demonstrate how seemingly minor changes can have profound unforeseen effects down the track. A bit like the butterfly effect in chaos theory.

I don’t pretend to be an expert on chaos theory in general, or the butterfly effect in particular, but the way I understand it, the idea centres on how “small, nearly imperceptible changes can have massive implications in complex systems”.… Continue reading