Abstract
Eight lemon cultivars were screened against different isolates of Xanthomonas axonopodis pv. citri Vauterin et al., 1995, causal agent of citrus bacterial canker disease, by artificial inoculation. More over, fifty seven hybrids of acid lime × lemon were subjected to screening under natural epiphytotic conditions in the field. Most of the lemon cultivars exhibited high level of resistance against different isolates of X. axonopodis pv. citri. Variability was observed in the virulence among different X. axonopodis pv. citri isolates. Two hybrids from acid lime × Nepali round lemon were free from disease, while six hybrids were resistant. Quite a few hybrids from acid lime × Nepali oblong lemon and acid lime × Nepali round lemon were moderately resistant. Studies revealed possibilities of evolving bacterial canker resistant hybrids of acid lime and lemon.
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