Friday, September 20, 2024

Pest and Diseases

Horticultural pest and diseases

Wireworms have a distinctive form (Supplied by Denis Crawford of Graphic Science)
Environment & SustainabilityPest and Diseases

What grub is that?

By Denis Crawford

Insects that have life cycles of complete metamorphosis have larvae that come in a variety of forms.

A life cycle of complete metamorphosis (holometabolous) means hatching from an egg into a larval stage, then pupating, and later emerging as an adult.… Continue reading

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This caterpillar has three pairs of true legs and four pairs of abdominal prolegs (Supplied by Denis Crawford of Graphic Science)
Environment & SustainabilityPest and Diseases

Identifying insects

Many insects are instantly recognisable but what do you do when you find an insect you’ve never seen before?

If I described an insect as having a triangular head with large eyes, spindly hind legs and grasping raptorial forelegs, I reckon most of you would have an image of a praying mantis in mind.… Continue reading

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Gumtree scale ladybird feeding on scale (Supplied by Denis Crawford of Graphic Science)
Environment & SustainabilityPest and Diseases

Ants abound, but is that bad?

By Denis Crawford

Many ants are beneficial, but some ant species can be pests in some situations. When is that?

This Pest Files is inspired by some recent encounters I had with ants. In late January 2023 I noticed several species of ants climbing the trunk of a young roadside gumtree (Eucalyptus obliqua).… Continue reading

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Persimilis mites (orange) breed faster than two-spotted mites
Environment & SustainabilityPest and Diseases

Good bugs are no quick fix

By Denis Crawford

Biological control may not be an instant pest solution, but it is a pest control option well worth pursuing.

Large parts of eastern Australia have just been through a very wet spring and early summer. That period of warm wet weather meant a boom time for mosquitoes, they were everywhere in huge numbers.… Continue reading

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