Two isolates of Corynespora cassiicola obtained from tomato (Lycopersicon esculentum) were tested in a greenhouse to determine their pathogenicity to squash (Cucurbita pepo), Barbados cherry (Malpighia glabra), cowpea (Vigna unguiculata), papaya (Carica papaya), West Indian gherkin (Cucumis anguria), pepper (Capsicum annum), okra (Abelmoschus esculentus), soybean (Glycines max), tomato and sorrel (Hibiscus sabdariffa). The purpose of the study was to select plants for crop-rotation systems in tomato plantations.Two weeds common to tomato plantations, Commelina benghalensis and Vernonia cinerea, were included to evaluate their importance as source of inoculum. The host plants tested reacted differently to the pathogen but most of them were susceptible to both isolates. This suggests that tomato plants should not be cultivated in association with or closely to squash, cucumber, pepper, okra and sorrel plantations, especially where C. cassiicola occurs. For controlling the weeds C. benghalensis and V. cinerea, it is fundamentally important reduce inoculum in the field.
