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Agronomic research on cocoa in Jamaica 1950-1980 and current research trends

by Fagan, H.J; Topper, B.F.
Publisher: Oct 1988Subject(s): THEOBROMA CACAO | INVESTIGACION | PROYECTOS DE DESARROLLO | GERMOPLASMA | VARIEDADES | APLICACION DE ABONOS | PODA | CULTIVO INTERCALADO | INSECTOS DAÑINOS DE LA RAIZ | CULTIVOS | INDUSTRIA CACAOTERA | JAMAICA | THEOBROMA CACAO | RESEARCH | DEVELOPMENT PROJECTS | GERMPLASM | VARIETIES | FERTILIZER APPLICATION | PRUNING | INTERCROPPING | ROOT EATING INSECTS | CROPS | COCOA INDUSTRY | JAMAICA | THEOBROMA CACAO | RECHERCHE | PROJET DE DEVELOPPEMENT | GERMPLASM | VARIETE | FERTILISATION | TAILLE | CULTURE INTERCALAIRE | INSECTE RADICIVORE | PLANTE DE CULTURE | INDUSTRIE DU CACAO | JAMAIQUE | BREEDING PROGRAMS | ROOTED CUTTINGS | NUTRITION EXPERIMENTS | HIGH YIELDING HYBRIDSOnline Resources: En In: Tropical Agriculture (Trinidad y Tobago) v. 65(4) p. 290-294Summary: Agronomic research in cacao in the 1950s in Jamaica was devoted almost entirely to the introduction, propagation and establishment of different varieties imported mainly from Trinidad and St. Vincent. Field evaluation of these introductions led to the adoption of a few medium-to high-yielding varieties, but the later discovery of their susceptibility to black pod disease [Phytophthora palmivora (Butl.) Butl.] restricted their use as parents in breeding programmes. The resulting germplasm base of the cocoa industry is very narrow. However, the observed slow growth of the pathogen in the pod tissues of the susceptible variety ICS 60 permitted its use and resulted in the production of PA 150 x ICS 60 as the best-yielding local hybrid. Nutrition experiments dealt mainly with the effects of N, P and K on yield of cocoa cultivated with or without shade, and with liming of acid soils, but no experimentally-determined fertilizer recommendations ensued. New fertilizer experiments aim to address this, and other current research seeks to broaden the germplasm base of the cocoa industry and to re-evaluate a cocoa/coconut intercropping system.
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++ 35 ref. Sum. (En)

Agronomic research in cacao in the 1950s in Jamaica was devoted almost entirely to the introduction, propagation and establishment of different varieties imported mainly from Trinidad and St. Vincent. Field evaluation of these introductions led to the adoption of a few medium-to high-yielding varieties, but the later discovery of their susceptibility to black pod disease [Phytophthora palmivora (Butl.) Butl.] restricted their use as parents in breeding programmes. The resulting germplasm base of the cocoa industry is very narrow. However, the observed slow growth of the pathogen in the pod tissues of the susceptible variety ICS 60 permitted its use and resulted in the production of PA 150 x ICS 60 as the best-yielding local hybrid. Nutrition experiments dealt mainly with the effects of N, P and K on yield of cocoa cultivated with or without shade, and with liming of acid soils, but no experimentally-determined fertilizer recommendations ensued. New fertilizer experiments aim to address this, and other current research seeks to broaden the germplasm base of the cocoa industry and to re-evaluate a cocoa/coconut intercropping system.

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