Diprion similis
| Diprion similis | ||||||||||||
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Larva of Diprion similis |
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| Scientific name | ||||||||||||
| Diprion similis | ||||||||||||
| ( Hartig , 1836) |
Diprion similis (also known as the pine sawfly wasp ) is a species from the family of the bushhorn sawfly (Diprionidae). The pine bushhorn sawfly species is primarily known as adangerous forest pest introducedinto North America .
Appearance
The adult plant wasps reach a body size of 7–8 mm. They look very similar to those of the species Diprion pini and can only be differentiated by means of genital examinations.
Adult Diprion similis larvae have two black lines on their backs. There is a yellow-white-black pattern of spots on the sides. The head is black.
Occurrence
The original distribution area of the pine bushhorn sawfly is in Europe and North Asia. The species was first recorded in North America in 1914. There it spread in the following years. In 1977 the distribution area reached on the east coast from southeast Canada to North Carolina and to the west to the Great Lakes region . Since the female adults are bad fliers, their spatial expansion is explained by the transport of trees and leaves, as a result of which the eggs and larvae moved to new locations.
Way of life
The habitat of diprion similis is made up of pine forests. The adult plant wasps usually fly in Europe from the end of April or from mid-July in two generations. In Asia it is usually one, in North America there can be up to three generations per year.
The larvae eat pine needles. In the USA mainly on the Weymouth pine ( Pinus strobus ) but also on other pine species such as Scots pine ( Pinus sylvestris ), Banks pine ( Pinus banksiana ) and American red pine ( Pinus resinosa ) and, to a lesser extent, on Pinus virginiana and Pinus echinata .
The female adults lay their eggs in pine needles. To do this, they saw slots in the needles with their cutting machine. The larvae go through six stages and reach a body length of 25 mm in the last larval stage. The anal caterpillars spin a cocoon that they attach to parts of plants. They then pupate in the cocoon.
Taxonomy
The following synonyms are known from the literature :
- Diprion simile
- Lophyrus eremita Thomson , 1871
- Lophyrus similis Hartig , 1836
Individual evidence
- ↑ a b c www.faunistik.net ( Memento of the original from June 11, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ a b bugguide.net
- ↑ a b www.cabi.org
- ↑ a b c d wiki.bugwood.org
Web links
- Diprion similis at Fauna Europaea
- bugguide.net - taxonomy, photos, description
literature
- W. Schwenke : The forest pests of Europe (4th volume: Hymenoptera and Zweiflügler). Paul Parey Publishing House, Hamburg & Berlin 1982, ISBN 3-490-11416-7