Clearwing Moth - Blackcurrants, Redcurrants and Gooseberries 

This will be the result of the small caterpillar of the Clearwing Moth which is eating away at the pith on the inside of the stem.

Damage is normally noticed in early to late summer, as the Clearwing Moth lays its eggs in June. The eggs hatch and the caterpillars bore into the stem and live happily on the pithy centre.

Not huge problem unless you are a commercial grower, so best treatment is to cut back the affected stems to good green growth, and burn.

There are many Clearwing Moth types in the UK, and this particular moth should not be confused with the Clearwing Hummingbird Moth.

The Blackcurrant Clearwing moth is more like a small wasp - but with a black body. Whilst it is a day-flying moth, it is rarely noticed because of it's insignificance and small size. Looks like many other small flies and hover wasps to be found in the garden. A Brown body, with a couple of yellow bands across abdomen area and of course the clear wings which also have a light orange blotch at wing tips.