For all exposed sawfly larvae hellebore washes are most fatal, but they must not be used over ripe or ripening fruit, as the hellebore is poisonous.
Among these are the great spruce bark beetle (Dendroctonus micans) and defoliating insects such as the European sawfly (Gilpinia hercyniae ).
The QIC includes details of the hosts, description and life cycle, damage, sources and pest status of the European spruce sawfly.
Carry out a thorough weekly inspection of gooseberries from May onwards concentrating in the center of the bush for larvae of gooseberry sawfly.
The larvae, along with some sawfly larvae, share some responsibility for ' leaf roll ' damage to rose bushes.