Good enough to eat
HOW to tackle gooseberry sawfly If you see small S-shaped grubs devouring the leaves of your gooseberry bushes, the chance is they are the caterpillarlike larvae of one of three species of gooseberry sawfly.
Depending on which type it is, the grubs will either be pale green with black spots and black heads or just with pale green heads. The common gooseberry sawfly can have three generations a year, with larvae active in late April to June, July, and August to September.
Female sawflies lay their eggs on the underside of leaves low down in the middle of the bush and the young larvae eat their way upwards. Their damage will result in severely defoliated plants, which may not crop well the next year. If you see them, you can either pick them off by hand or snip off the leaves they are invading.
Alternatively, use a biological control (nematode), sold as Fruit and Vegetable Protection, which can be watered on to infested plants.