Abstract
An assessment of canker incidence in six cocoa clones revealed IMC 67 to be least susceptible and TSH 1076 most susceptible among the clones tested (ICS 1, IMC 67, P 18, SCA 6, TSH 1076 and TSH 1188). These results were confirmed by greenhouse studies on budded plants using artificial inoculation. IMC 67 with the smallest canker lesion size was found to have the highest value (3.75 N/m2) for extra‐xylary tissue hardness while TSH 1076 with the largest lesion size had the lowest value (1.9 N/m2). Bark moisture content determination also showed lowest values for IMC 67 and highest for TSH 1076. Bark hardness and moisture content were highly correlated with canker resistance.
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