Tiny bulbous red growths on leaves?


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Hello! Just wondering if anyone can identify what is wrong with this plant/causing these red growths?

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Work of the Red blister mite. Redcurrant bushes here really suffer from them. They actually do less harm than you would think, but obviously they make the leaves rather unsightly. No cure, except to remove the affected leaves and hope the bush grows new ones.
 
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Work of the Red blister mite. Redcurrant bushes here really suffer from them. They actually do less harm than you would think, but obviously they make the leaves rather unsightly. No cure, except to remove the affected leaves and hope the bush grows new ones.
Is it a mite or an insect. Neem works well on mites over here. I've never seen this particular menace before.
 
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It is actually an aphid. So, control would be by spraying the underside of the leaves with whatever takes your fancy.
If you look very closely at the stems of that shrub you can see the discarded skins of the aphids.
 

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