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SAMPLING POPULATIONS OF PINE LEAF CHERMID PINEUS PINIFOLIAE (HOMOPTERA: CHERMIDAE): III. NEOSISTENTES ON WHITE PINE1

Published online by Cambridge University Press:  31 May 2012

John B. Dimond  and
Douglas C. Allen
John B. Dimond
Affiliation:
Department of Entomology, University of Maine, Orono
Douglas C. Allen
Affiliation:
Department of Entomology, University of Maine, Orono
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Abstract

A population index for the estimation of the neosistens stage of pine leaf chermid on white pine is described. This is based on the observation that increasing numbers of the chermid produce increased stunting of length of pine needles. A regression relating chermid population density to needle length produced a correlation coefficient of −0.88, suggesting that measurements of needle length alone adequately estimate chermid populations under most conditions. The numbers and distribution of needles that must be measured to estimate length with reasonable precision are calculated. The total sampling plan for the four cyclic generations of the chermid is reviewed.

Type
Articles
Information
The Canadian Entomologist , Volume 106 , Issue 5 , May 1974 , pp. 509 - 518
Copyright
Copyright © Entomological Society of Canada 1974

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References

Allen, D. C. and Dimond, J. B.. 1968. A histological study of white pine shoots attacked by the exsule stage of Pineus pinifoliae. Ann. ent. Soc. Am. 61: 962–965.Google Scholar
Balch, R. E. and Underwood, G. R.. 1950. The life-history of Pineus pinifoliae (Fitch) (Homoptera: Phylloxeridae) and its effect on white pine. Can. Ent. 82: 117–123.CrossRefGoogle Scholar
DeBoo, R. F., Dimond, J. B., and Lowe, J. H. Jr., 1964. Impact of pine leaf aphid, Pineus pinifoliae (Chermidae) on its secondary host, eastern white pine. Can. Ent. 96: 765–772.CrossRefGoogle Scholar
Dimond, J. B. and Bishop, R. H.. 1968. Susceptibility and vulnerability of forests to the pine leaf aphid Pineus pinifoliae (Fitch) (Adelgidae). Bull. Me agric. Exp. Stn, No. 658. 16 pp.Google Scholar
Ford, R. P. and Dimond, J. B.. 1973. Sampling populations of pine leaf chermid Pineus pinifoliae (Homoptera: Chermidae). II. Adult gallicolae on the secondary host. Can. Ent. 105: 1265–1274.Google Scholar
Henderson, C. F. and McBurnie, H. B.. 1943. Sampling techniques for determining populations of the citrus red mite and its predators. Circ. U.S. Dep. Agric., No. 671.Google Scholar
Howse, G. M. and Dimond, J. B.. 1965. Sampling populations of pine leaf adelgid Pineus pinifoliae (Fitch). I. The gall and associated insects. Can. Ent. 97: 952–961.Google Scholar
Snedecor, G. W. 1956. Statistical methods, 5th ed. Iowa State College Press, Ames. 534 pp.Google Scholar
Southwood, T. R. E. 1966. Ecological methods with particular reference to the study of insect populations. Methuen, London. 391 pp.Google Scholar
Steel, R. G. D. and Torrie, J. H.. 1960. Principles and procedures of statistics. McGraw-Hill, New York. 481 pp.Google Scholar