Horticultural pest and diseases
Eggs are laid on new leaves (Supplied by Denis Crawford of Graphic Science)
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
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Cabbage white butterfly caterpillars can devastate brassicas
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
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