Bark beetles

Type :

Presentation

Pages :

7 pages

Format :

.doc

Published date :

11/21/2008

Category :

Science & technology

Sub category :

Biology

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Summary :

Introduction.
Taxonomy.
Life cycle.
Host plants.
1. Colonizing post plants.
Factors limiting population growth.
Ecosystem processes.
1. Fire.
2. Forest succession.
3. Decomposition.
Management options.
Conclusion.

Abstract

bark beetles are small, dark, cylindrical beetles, usually less than 7mm long. As their name implies, they are usually associated with woody plants. Despite their small size and modest appearance, they have an intriguing assemblage of feeding and breeding habits, some of which result in signiﬁcant economic losses to forest and agricultural industries. This article reviews the taxonomy, life cycle, host-plant interactions and ecosystem consequences of bark beetles, concluding with management options. bark beetles have commonly been considered a family, Scolytidae, but recent taxonomy places them as a subfamily, Scolytinae, within the weevil family Curculionidae. Major characteristics that are shared with weevils include elbowed, clubbed antennae, larvae that feed within plant tissues, and the loss of the development of legs in larvae. The Scolytinae and closely related Platypodinae differ from typical weevils in their oviposition behavior: adults bore deeply into plant tissues to oviposit, while typical weevils use their elongated rostrum to create egg niches from the surface of the plant.