There are times we need help from God to get rid of mice and rats, locusts, worms, rats, etc. A deprecatory prayer expresses to God –the Creator of all things– our negative or disapproval of one His guests. The prayer speaks for itself.
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’ sake.
Psalm 43.1: O God, our ears have heard, our fathers have declared to us.
All: Glory be to the Father.
Priest: As it was in the beginning.
All say the Antiphon: Arise, Lord, help us; and deliver us for your kindness’ sake.
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 our Lord.
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, by 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.
The places infested are sprinkled with holy water.