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CONTACT AND RESIDUAL EFFECT OF LOW-VOLUME DOSAGES OF PHOSPHAMIDON TO CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE) ON TWO SPECIES OF CONIFERS12

Published online by Cambridge University Press:  31 May 2012

J. F. Stewart  and
N. R. Brown
J. F. Stewart
Affiliation:
Faculty of Forestry, University of New Brunswick, Fredericton
N. R. Brown
Affiliation:
Faculty of Forestry, University of New Brunswick, Fredericton
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Abstract

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A series of low-volume spray treatments were conducted to study the contact and residual effect of two concentrations of the insecticide phosphamidon to fourth instar spruce budworm, Choristoneura fumiferana (Clem.), on balsam fir, Abies balsamea (L.) Mill, and red spruce, Picea rubens Sarg. Treatment of sprayed larvae on sprayed trees, unsprayed larvae on sprayed trees, and sprayed larvae on unsprayed trees, resulted in two principal conclusions: (a) Higher concentrations of phosphamidon (1% versus 0.5% active) accelerated mortality in all instances and (b) no statistical difference (P = 0.1%) was found in the final mortalities between treatments in which only the foliage was treated and where both larvae and foliage were treated with phosphamidon.

Type
Articles
Information
The Canadian Entomologist , Volume 104 , Issue 7 , July 1972 , pp. 1051 - 1054
Copyright
Copyright © Entomological Society of Canada 1972

References

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Macdonald, D. R. 1967. Summary statement on the entomological assessment of the 1967 spruce budworm aerial spraying program in N.B. and forecast of conditions for 1968. Information Rep., Canada Dep. Forestry, Forest Res. Lab., Fredericton, N.B.Google Scholar
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