The Roman Ritual contains most if not all prayers and blessings. While the book may not be of interest to most of our visitors, it does have a few gems such as the method to perform an exorcism as well as this gem.
DEPRECATORY BLESSING AGAINST PESTS
(mice and rats, locusts, worms, etc.)
The priest vests in surplice and purple stole, and coming to the
field or place infested with these creatures, says:
Antiphon: Arise, Lord, help us; and deliver us for your kindness’
Ps 43.1: O God, our ears have heard, our fathers have declared to
All: Glory be to the Father.
P: As it was in the beginning.
All Ant.: Arise, Lord, help us; and deliver us for your kindness’
P: Our help is in the name of the Lord.
All: Who made heaven and earth.
P: Lord, heed my prayer.
All: And let my cry be heard by you.
P: The Lord be with you.
All: May He also be with you.
Let us pray.
We entreat you, Lord, be pleased to hear our prayers; and even
though we rightly deserve, on account of our sins, this plague of
mice (or locusts, worms, etc.), yet mercifully deliver us for
your kindness’ sake. Let this plague be expelled by your power,
and our land and fields be left fertile, so that all it produces
redound to your glory and serve our necessities; through Christ
Let us pray.
Almighty everlasting God, the donor of all good things, and the
most merciful pardoner of our sins; before whom all creatures bow
down in adoration, those in heaven, on earth, and below the
earth; preserve us sinners by your might, that whatever we
undertake with trust in your protection may meet with success by
your grace. And now as we utter a curse on these noxious pests,
may they be cursed by you; as we seek to destroy them, may they be destroyed by you; as we seek to exterminate them, may they be exterminated by you; so that delivered from this plague by your goodness, we may freely offer thanks to your majesty; through
Christ our Lord.
I cast out you noxious vermin, by God + the Father almighty, byThe places infested are sprinkled with holy water.
Jesus + Christ, His only-begotten Son, and by the Holy + Spirit.
May you speedily be banished from our land and fields, lingering
here no longer, but passing on to places where you can do no
harm. In the name of the almighty God and the entire heavenly
court, as well as in the name of the holy Church of God, we
pronounce a curse on you, that wherever you go you may be cursed, decreasing from day to day until you are obliterated. Let no remnant of you remain anywhere, except what might be necessary for the welfare and use of mankind. Be pleased to grant our request, you who are coming to judge both the living and the dead and the world by fire.