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ASSESSMENT OF TOBACCO LOSSES CAUSED BY THE DARK-SIDED CUTWORM, EUXOA MESSORIA (LEPIDOPTERA: NOCTUIDAE), DELHI, ONTARIO1

Published online by Cambridge University Press:  31 May 2012

H. H. Cheng
H. H. Cheng
Affiliation:
Research Station, Canada Department of Agriculture, Delhi, Ontario
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Abstract

Intensive studies on the damage and losses of flue-cured tobacco caused by the dark-sided cutworm, Euxoa messoria (Harris), were carried out in the field at Delhi, Ont., during 1967 and 1968. A new method for estimating the accurate tobacco crop losses is illustrated. Assessment of damage of the tobacco plant and the population density in relation to the yield are described. The yield was significantly related, negatively, to the dark-sided cutworm density, and was reduced in the cutworm-damaged blocks in comparison with the yield in the undamaged check blocks. Assessment of average losses caused by the species was 17% of marketable tobacco, which, based on the average current prices, would amount to 200 dollars per acre or approximately 25 million dollars over the country as a whole every year.

Type
Articles
Information
The Canadian Entomologist , Volume 103 , Issue 4 , April 1971 , pp. 534 - 541
Copyright
Copyright © Entomological Society of Canada 1971

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References

Church, B. M., Westmacott, M. H., and Jacob, F. H.. 1956. Survey of rabbit damage to winter cereals 1953–1954. Pl. Pathol. 5: 66–69.CrossRefGoogle Scholar
Duncan, D. B. 1955. Multiple range and multiple F tests. Biometrics 11: 1–42.CrossRefGoogle Scholar
Elliot, J. M. and Vickery, L. S.. 1959. Ontario flue-cured tobacco soils and their fertilizer requirements. Can. Dep. Agric. Publ. 987.Google Scholar
Farm Products Grades and Sales Act and Regulations respecting flue-cured tobacco. 1965. Toronto, Ont.Google Scholar
Jacobson, L. A. and Peterson, L. K.. 1965. Interrelations of damage of wheat and feeding by the pale western cutworm, Agrotis orthogonia Morrison (Lepidoptera: Noctuidae). Can. Ent. 97: 153–158.CrossRefGoogle Scholar
Judenko, E. 1965. The assessment of economic effectiveness of pest control in field experiments. PANS (London) 11: 359–365.Google Scholar
Judenko, E., Johnson, C. G., and Taylor, L. R.. 1952. The effect of Aphis fabae Scop. on the growth and yield of field beans in a garden plot. Pl. Pathol. 1: 60–63.CrossRefGoogle Scholar
Manson, G. F. et al. 1963. Insects of the season 1963 in southwestern Ontario. Can. Insect Pest Rev. 41: 217–221.Google Scholar
Manson, G. F. 1964. Insects of the season 1964 in southwestern Ontario. Can. Insect Pest Rev. 42: 192–196.Google Scholar
Manson, G. F., Wressell, H. B., and Begg, J. A.. 1965. Insects of the season 1965 in southwestern Ontario. Can. Insect Pest Rev. 43: 216–218.Google Scholar
Raw, F. and Lofty, J. R.. 1957. Estimating crop losses due to wheat bulb fly. Pl. Pathol. 6: 51–56.CrossRefGoogle Scholar
Strickland, A. H. 1954. Assessment of cabbage aphid damage in commercial brussels sprout crops. Pl. Pathol. 3: 107–117.CrossRefGoogle Scholar
Wressell, H. B., Begg, J. A., and Niemczyk, H. D.. 1961. Insects of the season 1961 in southwestern Ontario. Can. Insect Pest Rev. 39: 339–345.Google Scholar