They are tall and known as highbush blueberry plants, whereas wild blueberries grow low to the ground on "lowbush" plants.

Global spread of powdery mildew threatens blueberries, costing millions and prompting better disease management strategies.

There are, in simple terms, two types of blueberry plants - the wild and the cultivated. The wild is native to the north eastern states of the US, particularly Maine, and over the border in Canada.