Pest and Diseases Archives - Page 3 of 18

Butterflies have more than aesthetic value in gardens (image supplied by Denis Crawford)

Environment & Sustainability Pest and Diseases

Where have all the butterflies gone?

11/02/2024 DEnis Crawford 494 Views 0 Comments #Tree, Botanic gardens, Garden Design, gardening, horticultural, horticultural industry, landscape, landscape design, Ornamental trees, Shade Trees

By Denis Crawford

Butterflies are desirable in gardens because they are indicators of a healthy environment. Unfortunately, they are under threat from climate change.

People enjoy seeing butterflies fluttering around their gardens and in bushland. Butterflies are considered to be harmless, perhaps with the exception of the cabbage white butterfly (Pieris rapae), and they are often quite large, colourful, and aesthetically pleasing.… Continue reading

Stalked lacewing eggs (Image by Denis Crawford)

Environment & Sustainability Pest and Diseases

Every insect has an enemy

11/12/2023 Denis Crawford 479 Views 0 Comments #Tree, Botanic gardens, Garden Design, gardening, horticultural, horticultural industry, landscape, landscape design, Ornamental trees, Shade Trees

By Denis Crawford

We all know about the natural enemies of pest insects, but did you know that beneficial insects also have their enemies?

I have often said “for every insect out there, there is probably another insect that wants to feed on it or breed in it”.… Continue reading