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Red Scale

Aonidiella auranti

Rooidopluis (Afr.), Red Scale, Scale Insects, Red Scale Insects

Suck sap out of plants. Can cause discolouration, leaves to drop and shoots to be distorted.

Aonidiella aurantti or red scale insects are a pest found commonly on citrus plants. The females are a brown-ish red colour and oval in shape. When they are moulting they become a kidney shape. The males are similar until they get to the second moult. They become darker than the females and are a yellow colour.

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Detection

Appearance
The females are a brown-ish red colour and oval in shape. When they are moulting they become a kidney shape. The males are similar until they get to the second moult. They become darker than the females and are a yellow colour.
Symptoms
Discoloured leaves or fruit is a sign that you may have red scale insects. Leaves dropping off and shoots being distorted. Tree bark can also split and the branches can die back which can cause the whole tree to die.

Personality

Order
Hemiptera
Family
Diaspididae
Metamorphosis
Incomplete
Distribution
South China

Biological treatment

If possible you can cut back branches or twigs that have the red scale insects on and destroy them to stop it spreading any further. Ants can cause an increase of scale insects as they spread them further around, so if you notice ants around your plant it is a good start to get in control of those.

Chemical treatment

As they have a hard waxy cover they are difficult to kill with pesticides. They are also becoming resistant to insecticides so it is very difficult to get rid of them through chemical use.

Attracts this pest

Citrus Plants

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