Pest and Diseases Archives - Page 13 of 18

Eggs are laid on new leaves (Supplied by Denis Crawford of Graphic Science)

Environment & Sustainability Pest and Diseases

Inside the chrysalis

05/04/2022 Denis Crawford 788 Views 0 Comments

By Denis Crawford

For insects which go through a lifecycle of complete metamorphosis, the pupal stage is a critical one. But sometimes the pupal process is not smooth sailing.

Only insects which pass through a lifecycle of complete metamorphosis (holometabolous) have a pupal stage.… Continue reading

Cabbage white butterfly caterpillars can devastate brassicas

Environment & Sustainability Pest and Diseases

Insects: boom or bust

04/03/2022 Denis Crawford 725 Views 0 Comments

By Denis Crawford

The populations of some insects can vary dramatically in size from one year to the next. Why does that happen?

As I write this Pest File my garden is a-flutter with clouds of cabbage white butterflies (Pieris rapae).… Continue reading