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Rose Root Aphids



P_rosertaphd

Rose Root Aphids

Usually appear in

All Year


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Caused By:-     The Aphid Maculolachnus submacula

Description

Rose Root Aphid Maculolachnus submacula have a similar life cycle as normal Aphids, but instead of attacking the above ground parts of the plant they attack the roots. Therefore they are often overlooked except when they climb up the stems to lay their eggs in the Autumn.
Their eggs are usually in a group and initially brown which soon turns black. They are rugby ball shape and about 1mm long The eggs overwinters to start the colony again in the Spring.
Like ordinary Aphids they suck the sap from the plant thereby weakening it and possibly transmitting viruses and other diseases. Rose Root Aphids attack the roots usually near the surface and the damage they do mostly affects plants when conditions are dry.
Often they have ants attending to them removing their honeydew secretions. The ants farm the aphids in the spring and summer they sometimes actually carry the aphids through the soil from one host plant to another.
When the infestation is heavy the plant or tree will wilt especially on dry days. The leaves may turn yellow and fall prematurely and the plant will be stunted.
These pests often go largely unnoticed because they are underground. The damage they do show up mostly when the conditions are dry.
See also Root Aphids
Picture by Whitney Cranshaw, Colorado State University, Bugwood.org


Control

Insecticides and insecticidal soaps can be applied as a soil drench.
There are some wasps and other beneficial insects that are predatory on these aphids.
There are also Nematodes that attacks them.



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