Answer: Warty growths on Nerium (oleander) are probably bacterial galls. These canker-like lesions can appear on all plant parts except the flowers. It's best to cut off and destroy infected plant parts, carefully disinfecting the pruners (dip in alcohol) after each cut. The galls are usually preceded by scale insects or mealybugs. The insects do not cause the galls, but provide an opening for infection. Applying Miracid will have no affect on the bacterial galls.
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