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A method of assessing caterpillar populations on large forest trees, using a systemic insecticide
Author(s) -
SATCHELL J. E.,
MOUNTFORD M. D.
Publication year - 1962
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.1744-7348.1962.tb06039.x
Subject(s) - biology , caterpillar , bark (sound) , larva , population , tree (set theory) , toxicology , ecology , mathematics , mathematical analysis , demography , sociology
SUMMARY A method is described of obtaining estimates of numbers of leaf‐feeding caterpillars on oak trees which might be applied to other large, irregularly‐branched forest trees. A systemic insecticide was introduced to tree boles through cuts in the bark, and poisoned larvae were collected on sheets as they fell off the foliage. Larvae remaining on the trees were subsequently sampled and included in the population estimate. Apart from the cuts, which eventually callused over, the method did not injure the trees.