Abstract
PREPARATIONS for breeding a strain of Theobroma cacao L. resistant to the swollen-shoot virus which threatens the cacao industry of the Gold Coast1 have included the collection of commercial types of T. cacao and of related species of Theobroma, some of which have been shown to give compatible crosses with T. cacao2. With the assistance of the Imperial College of Tropical Agriculture, seed from selected trees has been introduced to the Gold Coast from Trinidad. As a precaution against the introduction of witches' broom disease (Marasmius perniciosus Stahel) pods were surface-sterilized before dispatch by air; seedlings were quarantined for a minimum period of six months in Accra, which is twenty miles distant from the cacao-growing area.
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References
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GREENWOOD, M., POSNETTE, A. A Morphological Change Induced in Leaves of Theobroma cacao by Mineral Deficiency. Nature 159, 542–544 (1947). https://doi.org/10.1038/159542a0
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DOI: https://doi.org/10.1038/159542a0
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