Family: AphididaeOrder: Hemiptera
Biology:Many species can reproduce without males or have two forms of reproduction - sexual and asexual.
Life Cycle:They often survive harsh summer or winter conditions by shifting to protected locations or producing dormant resting forms or eggs that hatch when conditions improve. Winged forms often appear when overcrowding occurs or the plant or environment becomes stressful. They then move on to other plants, species or locations. They are usually most active in spring and autumn.
Habitats:Origin and History:
|Species||Abdomen Colour||Body length||Colony habit||Features|
|Blue Green Aphid||Waxy blue-green||2-3 mm||On growing tips.||Long pale legs with black tips. 2 long "exhaust pipes" on tail.|
|Cabbage Aphid||Greyish to dull mid-green||1.6-2.8 mm||Dense on tips of plants.||Coated with white mealy wax.|
|Green Peach Aphid||Waxy green, but varies from shining yellow to pink or orange red.|
Winged form has a black patch.
|1.2-2.3 mm||Usually scattered light colonies. Often on lower leaves.|
|Potato Aphid||Light yellowish to pinkish green or bright green. Often with a darker green stripe down middle of the back||1.7-3.6 mm||Small colonies||Red eyes.|
|Turnip Aphid||Yellowish to olive-green, sometimes with dark bars.||1.4-2.4 mm||Dense on tips of plants.||Black legs. Small "exhaust pipes" on tail. Sometimes has a waxy dusting|
Management and Control:There are a number of insects that feed on aphids such as lady birds, lace wings, hover flies and parasitic wasps. Choosing an insecticide that doesn't harm these species helps maintain control for a longer time or helps keep aphid numbers at lower levels.
Related Species:Cherry aphid (Myzus cerasi) is an exotic pest. Please report if found.
Acknowledgments:Collated by HerbiGuide. Phone 08 98444064 or www.herbiguide.com.au for more information.