Full text of this article is only available in PDF format.

Timo Kurkela (email), Tarmo Aalto, Martti Varama, Risto Jalkanen

Defoliation by the common pine sawfly (Diprion pini) and subsequent growth reduction in Scots pine: a retrospective approach

Kurkela T., Aalto T., Varama M., Jalkanen R. (2005). Defoliation by the common pine sawfly (Diprion pini) and subsequent growth reduction in Scots pine: a retrospective approach. Silva Fennica vol. 39 no. 4 article id 360. https://doi.org/10.14214/sf.360

Abstract

The foliage status in the main stem of Scots pines (Pinus sylvestris) was studied retrospectively using the needle trace method (NTM) on a stand, seriously defoliated by the pine sawfly (Diprion pini) in the 1980s. Needle density increased abruptly in the seasons following the defoliation. The strongest reduction in annual needle production occurred one year later. As a consequence of lower needle production, the annual number of attached needles decreased three to five years after the defoliation. Needle retention and the average age of attached needles tended to increase after defoliation. In analyses of covariance with the NTM variables, needle density (logarithmic transformed values) and average age of attached needles, had the highest, significant, negative relationship with radial and height increments both in the period prior to the defoliation and in the time when the trees were suffering from defoliation. The relationships between height increment and the number of needles and needle loss were positive and significant. Also radial increment had a positive relationship with the number of needles but not with needle loss. Interestingly, an abrupt increase in the needle density gave a good indication of the effects of a sudden defoliation in pines.

Keywords
height growth; NTM; defoliation; insect attack; needle density; needle production; needle retention; radial growth; herbivory

Author Info
  • Kurkela, Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, FI-01301 Vantaa, Finland E-mail timo.kurkela@metla.fi (email)
  • Aalto, Finnish Forest Research Institute, Rovaniemi Research Unit, P.O. Box 16, FI-96301 Rovaniemi, Finland E-mail ta@nn.fi
  • Varama, Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, FI-01301 Vantaa, Finland E-mail mv@nn.fi
  • Jalkanen, Finnish Forest Research Institute, Rovaniemi Research Unit, P.O. Box 16, FI-96301 Rovaniemi, Finland E-mail rj@nn.fi

Received 3 December 2004 Accepted 26 October 2005 Published 31 December 2005

Views 2949

Available at https://doi.org/10.14214/sf.360 | Download PDF

Creative Commons License CC BY-SA 4.0

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Petäistö R.-L., (1989) The influence of autumn transplanting date on th.. Silva Fennica vol. 23 no. 3 article id 5384
Pukkala T., (1987) Effect of seed production on the annual growth o.. Silva Fennica vol. 21 no. 2 article id 5312
Heliövaara K., Annila E. et al. (1983) Effect of nitrogen fertilization and insecticide.. Silva Fennica vol. 17 no. 4 article id 5197
Kellomäki S., Puttonen P. et al. (1982) Effect of nitrogen fertilization on photosynthes.. Silva Fennica vol. 16 no. 4 article id 5169
Heliövaara K., (1982) The pine bark bug, Aradus cinnamomeus (Heteropte.. Silva Fennica vol. 16 no. 4 article id 5168
Katainen H.-S., Kellomäki S. (1981) Effect of foliar application of dilute sulphuric.. Silva Fennica vol. 15 no. 3 article id 5123
Kellomäki S., (1981) Effect of the within-stand light conditions on t.. Silva Fennica vol. 15 no. 2 article id 5111
Kellomäki S., Kanninen M. (1980) Eco-physiological studies on young Scots pine st.. Silva Fennica vol. 14 no. 4 article id 5092
Ilonen P., Hari P. et al. (1979) On distribution of growth in crown system of you.. Silva Fennica vol. 13 no. 4 article id 5049
Yli-Vakkuri P., Pelkonen P. (1976) Rooting of Scots pine needle fascicles with diff.. Silva Fennica vol. 10 no. 4 article id 4956
Luukkanen O., Räsänen P. K. et al. (1971) The use of needle colour in predicting growth an.. Silva Fennica vol. 5 no. 4 article id 4853
Kulmala L., Žliobaitė I. et al. (2016) Environmental control of growth variation in a b.. Silva Fennica vol. 50 no. 5 article id 1680
Moilanen M., Hytönen J. et al. (2015) Fertilization increased growth of Scots pine and.. Silva Fennica vol. 49 no. 3 article id 1301
Peltola H., Gort J. et al. (2009) Differences in growth and wood density traits in.. Silva Fennica vol. 43 no. 3 article id 192
Peltola H., Kilpeläinen A. et al. (2007) Effects of early thinning regime and tree status.. Silva Fennica vol. 41 no. 3 article id 285
Jacobson S., (2003) Addition of stabilized wood ashes to Swedish con.. Silva Fennica vol. 37 no. 4 article id 483