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Observations on the life cycle and pathogenicity of Paralongidorus maximus in a forest nursery in Scotland
Author(s) -
BOAG B.,
RASCHKE I. E.,
BROWN D. J. F.
Publication year - 1977
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1977.tb01924.x
Subject(s) - scots pine , biology , larch , sowing , pinus <genus> , botany , scots , horticulture , zoology , art , literature
SUMMARY Soil samples from a forest nursery growing Scots pine were collected at monthly intervals at five different depths during 1975 and examined for Paralongidorus maximus: 49% occurred at the 10–19 cm depth. The fluctuation in the numbers of the larval stages suggested that a complete life cycle from egg to adult probably took more than 1 yr. Growth in the second year after planting and overall height of Scots pine seedlings was inversely related to the numbers of P. maximus. In a glasshouse experiment using varying numbers of P. maximus the growth of Scots pine and European larch but not of Sitka spruce were decreased by increasing numbers of nematodes. A possible relationship between P. maximus, Cylindro‐carpon destructans and the death of small numbers of Scots pine is discussed.