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Experiments on the Control of the Pink Boll-worm in Egypt

Published online by Cambridge University Press:  10 July 2009

N. W. Barritt
N. W. Barritt
Affiliation:
Late Senior Botanist, Cotton Research Board, Egypt.
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Extract

C. B. Williams has shown that at the time of the first picking, i.e., about the second week of September, the extent of attack by Platyedra gossypiella averaged 75 per cent. of the bolls during the years 1916 to 1924, and that at the end of September the percentage had risen to 90–95. He also showed that there is a definite correlation between the date of maturity of the crop and the development of the attack.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 20 , Issue 1 , June 1929 , pp. 41 - 43
Copyright
Copyright © Cambridge University Press 1929

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References

(1)Williams, C. B. Seasonal Variation in Pink Boll Worm Attack in Egypt.—Bull. No. 67, Ministry of Agriculture, Egypt, 1926.Google Scholar
(2)Bishara, I. Note on the Estimation of Loss by Boll Worms.—Bulletin No. 49, Ministry of Agriculture, Egypt, 1924.Google Scholar
(3)Gough, L. The Life History of Gelechia gossypiella from Harvest to time of Sowing.—Bull. No. 4, p. 10, Ministry of Agric., Egypt, 1916.Google Scholar