Survival capacity of cacao top grafted with scions infected by vascular streak dieback pathogen: potential source of the disease long-distance spread

Abstract

Vascular streak dieback (VSD) disease, caused by Ceratobasidium theobromae, is a significant cocoa diseases in Indonesia. Planting materials are often produced by top grafting raising the possibility that VSD may be spread through the use of infected grafting materials. When scions from VSD-infected stems were used in grafting, both the rootstock and new growth from the scion developed symptoms of VSD. Infected scions often failed to establish when used for top grafting. This finding proves that the use of infected scions when top grafting can result in infected planting material with potential for spreading VSD.

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