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Studies of the Lecanium Scale, Eulecanium coryli (L.), and its Parasite, Blastothrix sericea (Dalm.), in British Columbia1

Published online by Cambridge University Press:  31 May 2012

K. Graham  and
M. L. Prebble
K. Graham
Affiliation:
Professor of Forest Entomology, Department of Zoology, University of British Columbia, Vancouver, B.C.
M. L. Prebble
Affiliation:
Agricultural Research Officer, Forest Insect Laboratory, Sault Ste. Marie, Ontario.
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Extract

The lecanium scale was introduced into Vancouver with nursery stock from England in 1903, and by 1910 had become firmly established. Severe injury to broad-leaved maple, vine maple and horse chestnut was reported in 1923, and chemical control operations were undertaken from 1924 to 1930, but with very transitory effects (9, 10). The encyrtid wasp, Blastothrix sericea (Dalm.), imported from England in 1928 and 1929, quickly became established at the liberation points in Sorth Vancouver, and by June, 1930 had dispersed over an area of about 20 square miles. In April, 1931, twigs with parasitized scales from North Vancouver were distributed at intervals throughout the main area of lecanium infestation south and east of Vancouver, and by June of that year the parasite was known to be established over an area of about 100 square miles. By 1932, the percentage of parasitism in the mature lecanium females reached 90 to 100 per cent, and host population density was at very low levels (12, 13).

Type
Articles
Information
The Canadian Entomologist , Volume 85 , Issue 5 , May 1953 , pp. 153 - 181
Copyright
Copyright © Entomological Society of Canada 1953

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References

(1)Blackman, G. E.Statistical and ecological studies in the distribution of species in plant communities. 1. Dispersion as a factor in the study of changes in plant populations. Ann. Bot. n.s. 6 (22): 351–370. 1942.CrossRefGoogle Scholar
(2)Burnett, T.The distribution of the eggs of Encarsia formosa Gahan with respect to its host, the greenhouse whitefly Trialeurodes vaporariorum W. Rev. Can. de Biol. 2(4): 378–394. 1943.Google Scholar
(3)Canadian Insect Pest Review. 16(1): 72. 1938. 18(1): 75. 1940. 18 (2): 150. 1940. 19 (1): 86. 1941. Canada Dept. Agric. Ottawa.Google Scholar
(4)Clausen, C. P.Entomophagous insects. McGraw-Hill Book Company, Inc. New York. 1940.Google Scholar
(5)de Bach, P.The importance of host-feeding by adult parasites in the reduction of host populations. Jour. Econ. Ent. 36 (5): 647–658. 1943.CrossRefGoogle Scholar
(6)Ferris, G. F.Notes on Coccidae XI. (Hemiptera). Can. Ent. 57 (9): 228–234. 1925.CrossRefGoogle Scholar
(7)Fiske, W. F.Superparasitism: an important factor in the natural control of insects. Jour. Econ. Ent. 3: 88–97. 1910.CrossRefGoogle Scholar
(8)Flanders, S. E.Diauause in the parasitic Hymenoptera. Jour. Econ. Ent. 37 (3): 408–411. 1944.CrossRefGoogle Scholar
(9)Glendenning, R.The lecanium scale outbreak in Vancouver, B.C. Proc. Ent. Soc. B.C. 22: 21–26. 1925.Google Scholar
(10)Glendenning, R.The lecanium scale. An insect affecting fruit and shade trees on the Pacific Coast. Canada Dept. Agric. Cir. 77. 1931.Google Scholar
(11)Glendenning, R.The progress of parasite introduction in British Columbia. Proc. Ent. Soc. B.C. 28: 29–32. 1931.Google Scholar
(12)Glendenning, R.A successful parasite introduction into British Columbia. Can. Ent. 65 (8): 169–171. 1933.CrossRefGoogle Scholar
(13)Glendenning, R.On the control of Eulecanium coryli (L.) in British Columbia by the parasite Blastothrix sericea (Dalm.). Proc. Fifth Pac. Sci. Cong. Canada 1933, 5: 3543–3545. 1934.Google Scholar
(14)Imms, A. D.Observations on the insect parasites of some Coccidae. Quart. Jour. Micros. Sci. 63: 293–374. 1918.Google Scholar
(15)Kloet, G. S. and Hincks, W. D.. A check list of British insects, Stockport, England. 1945.Google Scholar
(16)Lloyd, D. C.Further experiments on host selection by hymenopterous parasites of the moth, Plutella maculipennis Curtis. Rev. Can. de Biol. 1 (6): 633–645. 1942.Google Scholar
(17)Salt, G.Superparasitism by Collyria calcitrator Grav. Bull. Ent. Res. 23 (2): 211–216. 1932.CrossRefGoogle Scholar
(18)Salt, G.Experimental studies in insect parasitism. I. Introduction and technique. II. Superparasitism. Proc. Roy. Soc. B. 114: 450–476. 1934.Google Scholar
(19)Simmonds, F. J.The occurrence of superparasitism in Nemeritis canescens Grav. Rev. Can. de Biol. 2 (1): 15–58. 1943.Google Scholar
(20)Snedecor, G. W.Statistical methods. 4th edition. Iowa State College Press, Ames, Iowa. 1946.Google ScholarPubMed
(21)Walker, M. G.A mathematical analysis of superparasitism by Collyria calcitrator Grav. Parasitology 29: 477–503. 1937.CrossRefGoogle Scholar
(22)Yagi, N.Determination of living and dead insects of Coccidae by the reaction of methylene blue. Oyo-Kontyu 1 (1): 1–2. 1938.Google Scholar