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The Effectiveness of Residues of Insecticides in Preventing Reinfestation of Apple Leaves by Apple Aphid, Aphis pomi DeG.: I. Diazinon, Trithion and Sevin1

  • D. P. Pielou (a1) and K. Williams (a1)

Extract

The apple aphid, Aphis pomi DeG., has long been a problem in British Columbia orchards (13), but has become particularly serious in the last few years (14, 15). Infestations are common on both bearing and young trees. Aphids occur especially at the terminal parts of new growth, suckers and sprouts. They reproduce extremely rapidly and large numbers cause curling and deformatinn of leaves. Further, this distortion of the leaves then protects the aphid colonies from spray application to some extent, and in clumps of such leaves, unharmed survivors are often found after the most thorough spraying. However, even where efficient spray application has been made before the leaf-curling stage has been reached, reinfestation and recolonization, presumably from outside sources, is a common occurrence. A search for “persistent” aphicides, that would at the same time give control of other common orchard pests such as codling moth, has been in progress at this laboratory for some years and in particular, Diazinon (15), Trithion (14), and Sevin (6) have been studied.

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References

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(1)Altmark, M. G. 1958. Canadian views and policies on insecticide tolerances. Proc. 10th Int. Congr. Ent., Montreal, 1956, 3: 283289.
(2) Anonymous. 1959. Control of tree-fruit pests and diseases. British Columbia Dept. Agr. Poster.
(3) Anonymous. 1960. Control of tree-fruit pests and diseases. Britirh Columbia Dept. Agr. Poster.
(4)David, W. A. L. 1959. The accumulation and adhesion of insecticides on leaf surfaces. Outlook on Agr. 2: 127136.
(5)Downing, R. S. 1958. Recent trials with new acaricides in British Columbia orchards. Canadian J. Plant Sci. 38: 6166.
(6)Downing, R. S. 1959. Sevin as an orchard insecticide in British Columbia. Proc. Ent. Soc. British Columbia 56: 4145.
(7)Geigy Agricultural Chemicals. 1956. Diazinon Tech. Bull. 56–1, New York, N.Y.
(8)Geigy Agricultural Chemicals. (No date). Methods of analysis for Diazinon. Bull. New York, N.Y.
(9)Gunther, F. A., and Blinn, R. C.. 1956). Persisting insecticide residues in plant materials. Ann. Rev. Ent. 1: 167180.
(10)Hightower, B. G. 1959. Bioassays of weathered residues of several organophosphorus insecticides. J. Econ. Ent. 52: 840842.
(11)Miskus, R. 1957. Modification in the method of analysis for Sevin. Private communication.
(12)Miskus, R. 1957. Modification in the method of analysis for Sevin. Univ. California, Berkeley. Unpublished results. Private communication.
(13)Palmer, L. L. 1913. Some problems of aphis control. Proc. Ent. Soc. British Columbia 3: 3134.
(14)Pielou, D. P., and Downing, R. S.. 1958. Trithion as an orchard insecticide. Proc. Ent. Soc. British Columbia 55: 1723.
(15)Pielou, D. P., and Proverbs, M. D.. 1958. Diazinon: A summary of recent work on a new orchard insecticide. Proc. Ent. Soc. British Columbia 55: 36.
(16)Rankin, W. B. 1958. The establishment of pesticide tolerances in the United States. Proc. 10th Int. Congr. Ent., Montreal, 1956, 3: 269272.
(17)Stauffer Chemical Company. 1956. Compound R-1303. Bull. Mountain View, California.
(18) Stauffer Chemical Company. 1956. Modification and additions to the “Colorimetric determination of R-1303 in plant material”. Bull.
(19)Union Carbide Chemicals Company. 1958. Sevin insecticide. Bull. White Plains N.Y.

The Effectiveness of Residues of Insecticides in Preventing Reinfestation of Apple Leaves by Apple Aphid, Aphis pomi DeG.: I. Diazinon, Trithion and Sevin1

  • D. P. Pielou (a1) and K. Williams (a1)

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