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Methods for estimating the number of the Cryptomeria red mite, especially with the removal by solutions
Author(s) -
Kobayashi Fujio,
Murai Minoru
Publication year - 1965
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02518813
Subject(s) - cryptomeria , mite , sodium hydroxide , biology , mathematics , horticulture , boiling , zoology , statistics , toxicology , botany , chemistry , japonica , organic chemistry
Summary We compared the removal by solution, the represented count‐area method and the beating, for the purpose of estimating the number of the Cryptomeria red mite. Among them the solution procedure provided the smallest standard error as per cent of the mean. 0.25 per cent unheated solution of sodium hydroxide is used for the summer generation, and also 0.25 per cent boiling one for the winter eggs. The mean proportion removed±standard error for the summer eggs and the winter eggs were 0.8770±0.0316 and 0.7920±0.0281 respectively, while 0.9894±0.0050 for the mites.