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A Companson between the ODCB Technique and Heat Extraction of Soil Cores for Estimating Leatherjaket Populations
Author(s) -
SHAW M. W.,
BLASDALE P.,
ALLAN R. M.
Publication year - 1974
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1974.tb01827.x
Subject(s) - coring , biology , population , sampling (signal processing) , extraction (chemistry) , soil test , larva , veterinary medicine , ecology , soil water , demography , chromatography , drilling , mechanical engineering , medicine , chemistry , filter (signal processing) , sociology , computer science , engineering , computer vision
SUMMARY Two methods of sampling leathetjackets (larvae of Tipula spp.) were compared during the two winters of 1965–66 and 1966–67.in north‐east Scotland. The core method using dry heat extraction gave a signifi‐cantly higher estimate of population than the orthodichlorobenzene (ODCB) technique from October to February, particularli in 1965–66. A comparison over three years in general survey work gave few significant deferences, but 49 out of 64 lields sampled showed a larger population when estimated by coring.