Abstract
Planting of resistant ‘Malayan Dwarfs’ in Jamaica, to replace ‘Jamaica Tall’ coconuts killed by lethal yellowing disease, is being aided through the Lethal Yellowing Insurance Regulations. Funding is by a cess on production, and aid to any farmer (free seedlings and cash grants) is proportional to his previous sales of coconuts for copra. From 1966 to 1974, 1·7 million seedlings were issued out of 2·2 million offered to farmers. A sample survey of 100,000 seedlings planted on 61 farms in 1967–1969 showed 67% alive in 1973. Growth of the plants by 1973 was highly correlated with fertiliser use and level of weed control, and was negatively correlated with grazing damage and presence of shade. Onset of bearing was also highly correlated with fertiliser use, level of weed control and absence of shade.
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