Insect pests of Scots Pine plantations on sand dunes in 1956.
The investigations were made in stands up to 25 years old. The 43 species of harmful insects found are discussed. Of the Lepidoptera, Evetria spp. caused the most damage; of the Hymenoptera, Gilpinia frutetorum; of the Diptera, Thecodiplosis brachyntera; of the Coleoptera, Philopedon plagiatus and Magdalis frontalis; of the Heteroptera, Aradus cinnamomeus; of the Homoptera, Cinara spp. KEYWORDS: insect pests \ Pinus sylvestris \ insect pests \ protection \ forests \ aerial surveys \ use \ large scale photos \ Latvia \ insect pests \ Latvia