Wood borer performance and wood characteristics of drought-stressed Scots pine seedlings

Four-year-old Scots pine [Pinus sylvestris L. (Pinaceae)] seedlings were exposed to medium and severe drought stress for two consecutive years. The anatomical properties of drought-stressed Scots pine wood and their impact on the performance of destructive wood boring early instars of Hylotrupes baj...

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Bibliographic Details
Published in:Entomologia experimentalis et applicata 2010-11, Vol.137 (2), p.105-110
Main Authors: Heijari, Juha, Nerg, Anne-Marja, Holopainen, Jarmo K, Kainulainen, Pirjo
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Bark
Biological and medical sciences
Borers
Canals
cell lumen
Cerambycidae
Coleoptera
Droughts
earlywood
Feeding
Fundamental and applied biological sciences. Psychology
Growth rate
Hylotrupes bajulus
latewood
monoterpenes
Neonates
Phytopathology. Animal pests. Plant and forest protection
Pinaceae
Pinus sylvestris
Protozoa. Invertebrata
Protozoa. Invertebrates
Records, symptoms, damages, economic importance, population surveys
relative growth rate
resin acids
resin canal
Resins
Seedlings
Stress
tracheid
Water availability
xylem
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Summary:Four-year-old Scots pine [Pinus sylvestris L. (Pinaceae)] seedlings were exposed to medium and severe drought stress for two consecutive years. The anatomical properties of drought-stressed Scots pine wood and their impact on the performance of destructive wood boring early instars of Hylotrupes bajulus L. (Coleoptera: Cerambycidae) were studied. Drought stress significantly decreased diameter of earlywood tracheids in both growing years and diameter of latewood tracheids after the second growing season only. Cell lumen area was significantly decreased by both medium and severe drought stress compared to well-watered controls. In addition, area of cell lumen was significantly smaller in severe drought than in medium drought treatment. The drought stress marginally increased the number of resin canals in the wood, but did not affect the size of resin canals either in wood or bark. The relative growth rate of xylophagous H. bajulus neonatal larvae was not significantly affected by drought stress during the 106-day feeding period on Scots pine wood blocks. The results show that although water availability was an important factor affecting the development and anatomy of wood cells, observed changes in wood characteristics did not affect the performance of early instars feeding on wood processed from drought-stressed young Scots pine seedlings.
ISSN:0013-8703
1570-7458
DOI:10.1111/j.1570-7458.2010.01046.x