Ring made of palm leaves that grew during a sabbatical year

Is one allowed to rip leaves off a lulav (a palm branch) in order to make rings (koishlach, which hold the lulav together), if the lulav grew on a sabbatical year?

According to the law, in our age, a lulav does not acquire the holiness of a sabbatical year; therefore, there are no limitations as to how one is allowed to use it. However, there is an opinion, according to which it acquires holiness. According to this opinion, one is allowed to use the lulav to fulfill the commandment of the “four species”, but it is forbidden to use in a way that will destroy it. Even this opinion permits to make rings out of lulav leaves, but after the holiday is over, one should gather these leaves, tie them together and make them into a broom.