Small, blister-like galls on either side of eucalypt leaves (Protasov et al. 2007).

Ophelimus maskelli is a uniparental leaf galler. Adult O. maskelli oviposit into the leaf blade of eucalypts. One female can lay an average of 109 eggs and each egg induces a gall. Larvae develop and pupate within the galls, from which the adult wasps emerge. Three generations per year have been reported from Israel (Protasov et al. 2007).

Selection of resistant planting material and biological control. The biological control agent Closterocerus chamaeleon has already been detected in South Africa, presumable introduced with O. maskelli.