1 Ondokuz Mayis University, Faculty of Agriculture, Department of Plant Protection, Samsun, TURKEY
2 DEEDI, Horticulture and Forestry Science, Brisbane, AUSTRALIA
Corymbia spp. are high priority species for hardwood timber plantation development in Australia. Eriophyoid mites can severely affect their growth. The eriophyoid mites on Corymbia spp., their relationships, biologies and damage were determined in field and laboratory studies in south-east Queensland, Australia. Seven eriophyoid species were found on Corymbia citriodora; that number of species is very rarely found on one host. In spring, Acalox ptychocarpi and Acalox sp. caused the initial damage on immature leaves. Rhombacus spp. moved to the damaged area and all species cohabited. Epidermal blisters formed and spot and patch type damage were observed. In mite feeding experiments, both spot and patch type damage were seen on inoculated potted and in-ground seedlings of the C. citriodora complex. The mites were active during the mild, subtropical winter but there were differences in population densities between localities. In the laboratory, Rhombacus spp. adults fed on undamaged, mature leaf discs, but Acalox spp. and immature stages of the other mites did not feed.