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BIOLOGICAL STUDIES OF BUD MINING SAWFLIES, PLERONEURA SPP. (HYMENOPTERA: XYELIDAE), ON WHITE FIR IN THE CENTRAL SIERRA NEVADA OF CALIFORNIA: II. LARVAL DISTRIBUTION WITHIN TREE CROWNS1

Published online by Cambridge University Press:  31 May 2012

C. P. Ohmart  and
D. L. Dahlsten
C. P. Ohmart
Affiliation:
Division of Biological Control, Department of Entomological Sciences, University of California, Berkeley 94720
D. L. Dahlsten
Affiliation:
Division of Biological Control, Department of Entomological Sciences, University of California, Berkeley 94720
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Abstract

The within crown distribution of three species of Pleroneura and their food source (active buds) was determined on white fir trees 5–30 ft tall. Over 90% of all active buds and 94% of all infested buds occur in the outer half of the crown. Over 50% of the total active and infested buds occur in the middle third of the crown. Percentage infestation within the crown increases from bottom to top. Percentage infestation per tree decreases as tree size increases.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 6 , 01 June 1978 , pp. 583 - 590
Copyright
Copyright © Entomological Society of Canada 1978

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References

Kirk, R. E. 1968. Experimental design: procedures for the behavioral sciences. Brooks-Cole Co., Belmont, Calif.577 pp.Google Scholar
Kozlowski, T. T. and Ward, R. C.. 1961. Shoot elongation characteristics of forest trees. For. Sci. 7: 357–368.Google Scholar
Levin, J. R. and Marascuilo, L. A.. 1972. Type IV errors and interactions. Psych. Bull. 78: 368–374.CrossRefGoogle Scholar
Levin, J. R. and Marascuilo, L. A.. 1973. Type IV errors and games. Psych. Bull. 80: 308–309.CrossRefGoogle Scholar
Marascuilo, L. A. 1971. Statistical methods for behavioral science research. McGraw-Hill, New York. 578 pp.Google Scholar
Marascuilo, L. A. and Levin, J. R.. 1970. Appropriate post hoc comparisons for interaction and nested hypothesis in analysis of variance designs: The elimination of type IV errors. Am. Educ. Res. J. 7: 397–421.CrossRefGoogle Scholar
Ohmart, C. P. and Dahlsten, D. L.. 1977. Biological studies of bud mining sawflies, Pleroneura spp. (Hymenoptera: Xyelidae), on white fir in the central Sierra Nevada of California. I. Life cycles, niche utilization, and interaction between larval feeding and tree growth. Can. Ent. 109: 1001–1008.CrossRefGoogle Scholar