Management of mosaic disease of Amorphophallus campanulatus through leaf extract of Clerodendrum aculeatum

Foliar sprays with aqueous leaf extract of C. aculeatum plant since sprouting stage at fortnightly intervals in field, could significantly protect the Amorphophallus campanulatus against infection by the mosaic virus. Maximum reduction in disease incidence and symptom severity was exhibited by plants which received six sprays. Maximum plant growth along with considerable increases in corms weight was also observed in such plant. However, plants received five, four, three, two and a single sprays also exhibited pronounced effect, but as the number of sprays were reduced the antiviral efficacy of C. aculeatum was also reduced.