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Aphids

About - Aphids can be 1-10mm in size and green, black, red, or white in colour. They are a sap sucking insects and while a small presence of them won't cause you much trouble an outbreak can be detrimental. They have the ability to reproduce very quickly so it is important to introduce beneficial predators early on.

Monitoring - These pest bugs can usually be spotted on stems and the underside of leaves. Other indications of a possible aphid infestation is the presence of black mold and honeydew on leaves. Also the presence of ants can be a sign of aphids as the ants are attracted to the sweet sticky honeydew secretions of the aphid.

Treatment - Adalia bipunctata is a two-spotted ladybird that will kill up to 100 aphids per day. Aphelinus abdominalis, Aphidius colemani, Aphidius matricarae, and Aphidius ervi are all parasitic wasps that lay their eggs inside live aphids. When the eggs hatch the wasp larvae eats the predators from the inside out. Chrysopa carnea (aka lacewing) larvae hatch from their egg starved and take no time devouring their favourite food, aphids. Lacewings will also eat other pest bugs. Aphidoletes aphidimyza is also known as the aphid midge. The female midge lays up to 250 eggs in her short life time and each of these will eat up to 50 aphids per day.

Click here to download our full Aphid information sheet.

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