When a Jew stands a brick up with the intention of bowing down to it, but does not bow down to it, and then a gentile comes and bows down to it, benefit from [the brick] becomes forbidden, because standing it up is considered to be a deed. Similarly, if he stands an egg up and a gentile comes and bows down to it, it becomes forbidden.
If one cuts off a gourd or the like and bows down to it, it is forbidden. Even when one bows down to only half the gourd, and the other half is still attached to it, it is forbidden because of the doubt involved: perhaps the second half is considered to be a handle for the half which was worshiped.
It is forbidden to benefit from a tree which was planted for the purpose of being worshiped. This is the asherah that the Torah mentions. When a tree which had been planted previously was pruned and carved for the sake of idol worship - even if it was extended or a growth was grafted onto the trunk of the tree - and branches grew, one must cut off [these] branches, and benefit from them is forbidden. The remainder of the tree, however, is permitted.
Similarly, when a person bows down to a tree, even though the tree itself is not forbidden, it is forbidden to benefit from all the branches, leaves, sprouts, and fruits which it produces during the time it is worshiped.
When gentiles guard the fruits of a tree and say that they are designated to be used to make alcoholic beverages for a particular pagan temple, and [the fruits] are used for alcoholic beverages which are drunken on their pagan holidays, it is forbidden to benefit from this tree. This is the ritual associated with an asherah. Accordingly, we can assume that [the tree] is an asherah, and therefore its fruits will be used for such purposes.