Canadian Forest Service Publications
Bionomics and life history of the gall midge Chamaediplosis nootkatensis Gagne & Duncan (Diptera: decidomyiidae) on yellow cypress in British Columbia. 1994. Duncan, R.W. Pan Pacific Entomologist 70(2): 103-112.
Issued by: Pacific Forestry Centre
Catalog ID: 3547
The bionomics and life history of the gall midge, Chamaediplosis nootkatensis Gagné & Duncan, on yellow cypress are described including a detailed account of gall formation, seasonal development, parasitoids, host damage and geographic distribution. This gall midge has caused significant seed production losses and defoliation of yellow cypress at a seed orchard on Vancouver Island. The gall midge is univoltine but has two distinct life cycles determined by microclimatic differences within the tree.