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

Kari Löyttyniemi (email)

Havupunkin, Oligonychus ununguis (Jacobi), aiheuttaman neulasvioituksen vaikutuksesta kuusen taimien kasvuun.

Löyttyniemi K. (1971). Havupunkin, Oligonychus ununguis (Jacobi), aiheuttaman neulasvioituksen vaikutuksesta kuusen taimien kasvuun. Silva Fennica vol. 5 no. 1 article id 4835. https://doi.org/10.14214/sf.a14624

English title: Influence of damage caused to needles of Norway spruce by spruce spider mite, Oligonychus ununguis, on seedling growth

Abstract

The study was carried out in order to establish the possible influence of damage caused to the needles of Picea abies (L.) H. Karst. by the spruce spider mite, Oligonychus ununguis (Jacobi), and the growth of the damaged seedlings. The study was carried out in 1968–1970 by comparing growth of seedlings infected with spruce spider mite with that of seedlings where mites had been killed with acaricide (Eradex®). In the seedlings that had not been treated with acaricide, the number of wintering eggs were 60, 20 and 5 per shoot in the various years of the study. When the experiment was laid out, before planting and acaricide treatment, the seedlings were four years old, all seadlings were heavily infected, the number of wintering eggs being 100 per shoot. The growth of infected seedlings was 3, 20 and 15% smaller than that obtained for the seedlings which had been treated with acaricide.

The PDF includes a summary in English.

Original keywords
kuusi; taimituhot; pituuskasvu; havupunkki; neulasvauriot

English keywords
Norway spruce; Picea abies; height growth; spruce spider mite; Oligonychus ununguis; needle damages

Published in 1971

Views 500

Available at https://doi.org/10.14214/sf.a14624 | Download PDF

Creative Commons License

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
Löyttyniemi K., Heikkilä R. et al. (1992) Pine tar in preventing moose browsing. Silva Fennica vol. 26 no. 3 article id 5486
Heikkilä R., Löyttyniemi K. (1992) Growth response of young Scots pines to artifici.. Silva Fennica vol. 26 no. 1 article id 5469
Heliövaara K., Löyttyniemi K. (1989) Effect of forest fertilization on pine needle-fe.. Silva Fennica vol. 23 no. 4 article id 5390
Löyttyniemi K., Uusvaara O. (1986) Further tests for termite resistance of Finnish .. Silva Fennica vol. 20 no. 1 article id 5259
Löyttyniemi K., (1985) On repeated browsing of Scots pine saplings by m.. Silva Fennica vol. 19 no. 4 article id 5252
Löyttyniemi K., (1983) Flight periods of some birch timber insects. Silva Fennica vol. 17 no. 4 article id 5202
Löyttyniemi K., (1983) Preliminary testing of the resistance of Finnish.. Silva Fennica vol. 17 no. 1 article id 5177
Löyttyniemi K., Hiltunen R. et al. (1982) Monoterpene composition of needle oil of Pinus o.. Silva Fennica vol. 16 no. 4 article id 5167
Löyttyniemi K., Hiltunen R. (1978) Monoterpenes in Scots pine in relation to browsi.. Silva Fennica vol. 12 no. 2 article id 4992
Löyttyniemi K., (1972) Insect damages in hybrid aspen stands Silva Fennica vol. 6 no. 3 article id 4871
Löyttyniemi K., (1971) Influence of damage caused to needles of Norway .. Silva Fennica vol. 5 no. 1 article id 4835
Löyttyniemi K., (1969) The effect of treatment of Scots pine and Norway.. Silva Fennica vol. 3 no. 3 article id 4803
Löyttyniemi K., (1969) An Eriophyidae species damaging Norway spruce se.. Silva Fennica vol. 3 no. 3 article id 4802
Löyttyniemi K., (1968) Feeding of terminal shoots of Scots pine seedlin.. Silva Fennica vol. 2 no. 4 article id 4778
Löyttyniemi K., (1967) Damages caused to timber with bark by spruce amb.. Silva Fennica vol. 1 no. 2 article id 4746