His queen , Tissarakkhā was jealous of the Tree , and three years after she became queen ( i.e. , in the nineteenth year of Asoka 's reign ) , she caused the tree to be killed by means of mandu thorns .
:17 His queen , Tissarakkhā was jealous of the Tree , and three years after she became queen ( i.e. , in the nineteenth year of Asoka 's reign ) , she caused the tree to be killed by means of mandu thorns .