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Root Aphids



P_rootaphids

Root Aphids

Usually appear in

Spring to Autumn.


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Caused By:-     Various Aphids

Description

Root Aphids have a similar life cycle as normal Aphids, but instead of attacking the above ground parts of the plant they attack the roots of the plant. Like ordinary Aphids they suck the sap from the plant thereby weakening it and possibly transmitting viruses and other diseases. Root Aphids attack the roots usually near the surface. They often secrete a white waxy secretion like the Wooly Aphids of Apple. and when the soil is dug it looks like a fungus is attacking the roots of the plant. Some harmless fungi which cover roots with a powdery covering may be mistaken for Root Aphids.
Generally Root Aphids have short legs and short antennae, and, thus, are especially adapted for life in the soil. Often they have ants attending to them by 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.
Sometimes in the autumn a generation of winged aphids are produced which fly back to their second host and these give birth to wingless males and females which mate to produce the overwintering eggs which starts the cycle again the following Spring.
Some other root aphids species are The Auricula-root aphid Pemphigus auriculae, Bean-root aphid Trifidaphus phaseoli, The Cabbage Root Aphid, Pemphigus populitransversus, The Coniferous Root Aphid, Pachypappa tremulae, The Currant-root aphid Eriosoma ulmi, The Elder aphid Aphis sambuci, The Gooseberry-root aphid Eriosoma grossulariae, The Grape phylloxera Daktulosphaira vitifoliae, Lettuce are prey to Pemphigus bursarius, Rose-root aphid Maculolachnus submacula, and the The Sugar Beet Root Aphid, Pemphigus betae.
See also Rose Root Aphids.
Picture by Alton N. Sparks, Jr., University of Georgia, 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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