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Species Page

soft green scale

Coccus viridis

Distribution

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Host plants / species affected

Main hosts

show all species affected
Artocarpus (breadfruit trees)
Camellia sinensis (tea)
Citrus
Coffea (coffee)
Coffea arabica (arabica coffee)
Mangifera indica (mango)
Manihot esculenta (cassava)
Psidium guajava (guava)
Theobroma cacao (cocoa)

List of symptoms / signs

Fruit - external feeding
Leaves - honeydew or sooty mould
Leaves - honeydew or sooty mould
Stems - external feeding

Symptoms

Sap sucking and excretion of honey-dew producing sooty moulds and attracting ants.

Prevention and control

Chemical control is possible indirectly by controlling ants by banding the tree stump. This keeps the attending ants away and allows natural enemies to clean up the infestation. The band should be at least 15 cm wide and care taken to avoid leaving any bridges.

Natural enemies include predators such as ladybirds (Chilocorus), caterpillars (Noctuidae: Eublemma), parasites (Aphelinidae: Coccophagus, some Encyrtidae and Eulophidae). The parasitic fungus Cephalosporium lecanii is particularly effective in the rainy season when it can kill large colonies of the green coffee scale in a short period of time.

Impact

Although usually minor, can be extremely devastating depending on place and crop.