Distribution of pine needle gall midge, Thecodiplosis japonensis Uchida et Inouye (Diptera: Cecidomyiidae), infestations in Korea: a brief history.
The pine needle gall midge is the most destructive insect pest of pine [Pinus] forests in Korea, and was first simultaneously detected in Seoul and Muan, Chonnam Province (Korea Republic) in 1929. Its distribution has expanded gradually, and the pest is now distributed throughout the country. Since 1968, extensive surveys on the distribution of the pest have been carried out by the Forestry Research Institute and Forestry Administration in the Korea Republic. This paper reviews the regional distribution of infestations, and maps are given showing the expansion over the period 1968 to 1996.