<abstract xml:lang="et" xmlns="http://www.w3.org/1999/xhtml"><p>The great web-spinning pine-sawfly, <italic>Acantholyda posticalis</italic> (Matsumura 1912) (Hymenoptera, Pamphiliidae), is a common and widespread species, occurring throughout the pine forests of Europe and Asia. In the recorded history of forest entomology of Estonia, no mass outbreaks of this species have been reported before. In 2008, an outbreak of <italic>A. posticalis</italic> was recorded on the island of Saaremaa, Estonia. About 250 hectares of Scots pine (<italic>Pinus sylvestris</italic>) stands growing on sandy soils were defoliated. In 2009, no flight of <italic>A. posticalis</italic> was observed, the larvae remain in diapause in soil. An overview about distribution and outbreaks of <italic>A. posticalis</italic> is given and its impact on pine stands is discussed.</p></abstract>

The great web-spinning pine-sawfly, Acantholyda posticalis (Matsumura 1912) (Hymenoptera, Pamphiliidae), is a common and widespread species, occurring throughout the pine forests of Europe and Asia. In the recorded history of forest entomology of Estonia, no mass outbreaks of this species have been reported before. In 2008, an outbreak of A. posticalis was recorded on the island of Saaremaa, Estonia. About 250 hectares of Scots pine (Pinus sylvestris) stands growing on sandy soils were defoliated. In 2009, no flight of A. posticalis was observed, the larvae remain in diapause in soil. An overview about distribution and outbreaks of A. posticalis is given and its impact on pine stands is discussed.

The first reported outbreak of the great web-spinning pine-sawfly, <italic>Acantholyda posticalis</italic> (Mats.) (Hymenoptera, Pamphiliidae), in Estonia

Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, 51014 Tartu, Estonia

Centre of Forest Protection and Silviculture, Rõõmu tee 2, 51013 Tartu, Estonia

Forestry Studies

The first reported outbreak of the great web-spinning pine-sawfly,  (Mats.) (Hymenoptera, Pamphiliidae), in Estonia

The great web-spinning pine-sawfly, Acantholyda posticalis (Matsumura 1912) (Hymenoptera, Pamphiliidae), is a common and widespread species, occurring...

The first reported outbreak of the great web-spinning pine-sawfly, Acantholyda posticalis (Mats.) (Hymenoptera, Pamphiliidae), in Estonia

Published Online: Mar 24, 2011

Page range: 115 - 122

DOI: https://doi.org/10.2478/v10132-011-0072-z

Keywords
defoliation, Estonia, insect damage, outbreak, Saaremaa, Scots pine

This content is open access.