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Studies on Wheat Bulb Fly (Leptohylemyia coarctata (Fall.)). IV.—The Distribution of Damage in England and Wales in 1953

Published online by Cambridge University Press:  10 July 2009

H. C. Gough
H. C. Gough
Affiliation:
National Agricultural Advisory Service, Anstey Hall, Trumpington, Cambridge.
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Summary

It is estimated that in 1953, as a result of attack by Wheat Bulb Fly, Leptohylemyia coarctata (Fall.), 59,000 acres of wheat were re-drilled and 58,000 acres were patched with spring-sown wheat; another 85,000 acres were affected without any action being taken by the farmer. The cost of new seed and the reduction of yield of spring wheat as compared with winter wheat represent a minimum financial loss of about £1,200,000. With the aid of maps it is shown that the distribution of damage is similar to the distribution of wheat and to the area with less than 30 in., rainfall annually. In districts where over 5 per cent. of the combined crops and grass acreage is in potatoes, there is a tendency for the amount of damage by Wheat Bulb Fly to increase with increasing potato acreage.

It is tentatively suggested on circumstantial evidence that high rainfall on the west side of the country is partly responsible for the absence there of damage by Wheat Bulb Fly. Many of the variations in the distribution of damage on the eastern side of the country could be accounted for by differences in cropping.

In Scotland, the distribution of the fly is also confined to the eastern side. There are a few records of the fly in the Republic of Ireland.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 48 , Issue 2 , June 1957 , pp. 447 - 457
Copyright
Copyright © Cambridge University Press 1957

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