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Some Effects of DDT on Pulvinaria vitis (L.) (Homoptera: Coccidae) Infesting Peach in Ontario1

Published online by Cambridge University Press:  31 May 2012

J. H. H. Phillips ,
Wm. L. Putman  and
D. C. Herne
J. H. H. Phillips
Affiliation:
Entomology Laboratory, Research Branch, Canada Department of Agriculture, Vineland Station, Ontario
Wm. L. Putman
Affiliation:
Entomology Laboratory, Research Branch, Canada Department of Agriculture, Vineland Station, Ontario
D. C. Herne
Affiliation:
Entomology Laboratory, Research Branch, Canada Department of Agriculture, Vineland Station, Ontario
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Extract

A cottony scale of the genus Pulvinaria has been present in the peach orchards of the Niagara Peninsula of Ontario for many years. It has usually been referred to Pulainaria amygdali Ckll., but Phillips (1955) showed that it is almost undoubtedly P. vitis (L.). Ross and Caesar (1928) reported that it was generally distributed in the area as early as 1926, but only a few orchards were heavily infested. Subsequently only minor infestations were reported until about 1945. From 1946 to 1954 numerous orchards were heavily infested, but since 1954 the scale has been less important although it is widely distributed and sporadic infestations still occur.

Type
Articles
Information
The Canadian Entomologist , Volume 94 , Issue 5 , May 1962 , pp. 449 - 458
Copyright
Copyright © Entomological Society of Canada 1962

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References

Morris, R. F. 1957. The interpretation of mortality data in studies on population dynamics. Canadian Ent. 89: 49–69.CrossRefGoogle Scholar
Phillips, J. H. H. 1955. Identity of a cottony scale on peach in Ontario. Canadian Ent. 87.Google Scholar
Putman, W. L. 1955. Bionomics of Stethorus punctillum Weise (Coleoptera: Coccinellidae) in Ontario. Canadian Ent. 87: 9–33.CrossRefGoogle Scholar
Putman, W. L. 1956. Differences in susceptibility of two species of Chrysopa (Neuroptera: Chrysopidae) to DDT. Canadian Ent. 88: 520.CrossRefGoogle Scholar
Ross, W. A. and Caesar, L.. 1928. Insects of the season 1926 in Ontario. 58th Ann. Rept. Ent. Soc. Ontario, 1927, pp. 15–19.Google Scholar