Annual report on Nigeria / Colonial Office.

  • Great Britain. Colonial Office.
Date:
[1946]
Catalogue details

Licence: Public Domain Mark

Credit: Annual report on Nigeria / Colonial Office. Source: Wellcome Collection.

    115/130 (page 109)
    IO9 (1 sheet), Ibadan (9 sheets), Itu (1 sheet), Jos (2 sheets), Kafanchan (2 sheets), Kano (2 sheets), Opobo (2 sheets), Uyo (2 sheets). £ s- d. Plan of Ogbomosho Town, scale 400 ft. to 1 in. . . 40 Plan of Port Harcourt Township, scale 400 ft. to 1 in. . 60 Plan of Funtua Town, scale 400 ft. to 1 in. . . . 16 Plan of Makurdi Town, scale 1/6,250 ..... 26 Plans of the following Townships, scale 1/12,500. 5s. each Aba, Calabar, Kano and Minna. Plans of the following Townships, scale 1/12,500. 6s. each Enugu, Onitsha and Zaria. Plan of Kaduna Township, scale 1/12,500 . . . . 7 6 Plan of Ibadan and Environs, scale 1/12,500 .... 26 Index to Plans of above Townships. Each .... 6 Air-Strip Maps, scale 1/1,000,000 ..... 3 o Appendix D THE NIGERIAN COCOA SURVEY Objects of the Survey. The position as regards diseases and pests of cocoa in Nigeria has for many years given rise to considerable concern. Black-pod disease and damage by Sahlbergella and other Capsid bugs are known to cause a considerable amount of damage annually, and various methods have been adopted to bring them under control. Although their occurrence may cause serious damage in individual years, none of them has yet seriously threatened the cocoa industry. The appearance of swollen- shoot disease on the Gold Coast, where it has caused widespread destruc¬ tion of cocoa-trees, was a more serious cause for alarm, lest this virus was present, or would at some future time appear, in Nigeria. In 1944 it was accordingly decided that a Survey of all cocoa-farms in the Colony should be undertaken with the object of determining whether swollen-shoot disease was present, as well as of carrying out a thorough investigation of the incidence of other diseases and pests attacking cocoa, and studying the cultural aspects and economics of the industry. Discovery of Swollen-shoot Disease. As a result of these investigations swollen-shoot disease was discovered in 1945, and although the Survey is not yet complete, it seems fairly certain that the outbreak is confined to a comparatively small area in Oyo Province. The fact that its occurrence has been discovered at a relatively early stage renders the possibility of the disease being brought speedily and effectively under control much greater than might have been the case had the Survey not been undertaken. Method of Control of Swollen-Shoot Disease. The only known method at present of controlling swollen-shoot disease is that elaborated by the Gold Coast Agricultural Department,