Descriptions and biological data for insect gall formers on South African Solanum plants in 1985-88, and their parasitoids, are presented. Flower galls containing Scrobipalpa concrete larvae were found on Solanum linnaeanum, S. rigescens, S. coccineum, S. panduriforme, S. incanum, S. acanthoideum, S. giganteum and S. tomentosum. The Scrobipalpa concrete was parasitized by 2 species of Apanteles and a species of Bracon. Stem galls containing larvae of an unidentified gclechiid species were found on 3 of the above Solanum spp. This gelechiid was parasitized by a species of Apanteles, a species Eurytoma, Physaraia solanicola and an ichneumonid wasp on different host plants. Nodular galls and puff galls, both containing the same cecidomyiid, were found on the leaves of Solanum panduriforme, and contained many parasitoid species (Eurytonw spp., a bracortid, Teirastichus spp. and Omphale spp.). Flower and leaf galls caused by the same species were also abundant on cultivated eggplant (aubergine]. No galls occurred on any of 3 Solanum spp. that did not originate in South Africa. The use of the gall formers as control agents for the Solanum weeds of South Africa is proposed. none