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The large-scale Control of the Cotton Jassid in the Gezira and White Nile Areas of the Sudan

Published online by Cambridge University Press:  10 July 2009

O. W. Snow  and
J. Taylor
O. W. Snow
Affiliation:
Bourn, Cambridge
J. Taylor
Affiliation:
Statistician, Research DivisionMinistry of Agriculture, Sudan.
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Extract

The damage caused by the Cotton Jassid to the Egyptian-type cottons in the Gezira and White Nile areas of the Sudan is very considerable. Realisation of this fact has been greatly aided by chemical control of the pest in small-scale experiments, followed by large-scale work with tractor-drawn sprayers and with helicopters fitted with spraying equipment. This paper deals primarily with examination of available records pertaining to the cotton crops in the four seasons from 1946/47 to 1949/50, preceded firstly by an introduction which emphasises the importance of yield records in the appraisal and interpretation of losses from pests, and secondly by an account of certain aspects of the pest in the Gezira Scheme.

Large-scale spraying to control the pest started in the Gezira in the crop season 1945/46; yield increases from about 1,250 feddans (acres) sprayed with 0·1 per cent. DDT emulsion were very satisfactory. In succeeding seasons increasing areas were sprayed; in 1947/48 spraying was extended to the cotton farms along the White Nile between Khartoum and Kosti; in 1949/50 the total area sprayed in the Sudan was over 150,000 feddans. Material and also methods and dates of application varied considerably.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 43 , Issue 3 , October 1952 , pp. 479 - 502
Copyright
Copyright © Cambridge University Press 1952

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References

Chester, K. S. (1950). Plant disease losses: their appraisal and interpretation.—Plant Dis. Reptr., Suppl. 193.Google Scholar
Cowland, J. W. (1947). The cotton Jassid (Empoasca lybica, Berg.) in the Anglo-Egyptian Sudan, and experiments in its control.—Bull. ent. Res., 38, pp. 99–115.CrossRefGoogle Scholar
Cowland, J. W. & Edwards, C. J. (1949). Control of Empoasca lybica, de Berg., on cotton in the Anglo-Egyptain Sudan.—Bull. ent. Res., 40, pp. 83–96.CrossRefGoogle Scholar
Crowther, F. (1941). Studies in growth analysis of the cotton plant under irrigation in the Sudan. Part II. Seasonal variation in development and yield.—Ann. Bot., Lond., (N.S.) 5, pp. 509–533.CrossRefGoogle Scholar
Crowther, F. (1948). Jassids or cotton leaf hoppers (Empoasca lybica de Berg.).—In Tothill, J. D.E.d. Agriculture in the Sudan, pp. 514–516. Oxford Univ.Google Scholar
Hanna, A. D. (1950). The effect of rainfall on the Cottan Jassid, Empoasca lybica (de Berg.) in the Gezira, Anglo-Egyptain Sudan.—Bull. ent. Res., 41, pp.359–369.CrossRefGoogle Scholar
Sudan, (1935). Annual Report(s) of the Agricultural Research Service for 1934/38.Google Scholar