Final answer:
The assertion that all budding methods require the bark to be slipping is false. While bark slipping is beneficial for certain types of budding like T-budding, other methods such as chip budding do not require this condition and can be used when the bark is not slipping.
Step-by-step explanation:
The statement that all budding methods require the bark to be slipping is false. The term 'bark slipping' refers to the condition in which the bark easily separates from the wood, typically during periods of active growth in the spring or early summer in many plant species. This condition is favorable for certain types of grafting and budding, such as T-budding or shield budding, because it allows for the insertion of a bud without damaging the plant.
However, there are other budding methods, such as chip budding, that can be performed when the bark is not slipping. Chip budding involves cutting a chip of wood and bark from both the rootstock and the scion, with each cut containing a bud. The two pieces are then matched together and secured. This method can be employed at times of the year when the bark is tighter and not slipping. As such, while having bark that is slipping can facilitate some budding procedures, it is not a requirement for all.