Usually found in quite high numbers, they can completely defoliate a bush in a matter of a few weeks if left to their own devices. A sad looking framework is often all that remains, perhaps with the odd gooseberry hanging on forlornly here and there. Unfortunately there aren't any varieties resistant to this pest. Conscientious organic gardeners should remain vigilant, picking off any caterpillars every few days, but this is a painful task unless you are growing a virtually spine-free variety such as 'Pax'. Alternatively, use a chemical spray suitable for edible crops.
Gooseberries are also very susceptible to a disease called American gooseberry mildew.
To avoid this problem, grow disease-resistant varieties, such as 'Invicta', 'Greenfinch' and 'Pax'. Ask our experts for their advice or read their comments about controlling pests and diseases . Your technical gardening terms explained.