The scarecrow first appeared in the original first edition Fiend Folio (1981).
The scarecrow and the conscious scarecrow appeared in second edition for the Greyhawk setting in the Monstrous Compendium Greyhawk Appendix (1990), and both were reprinted in the Monstrous Manual (1993) under the "golem" heading. The Ravenloft scarecrow appeared for the Ravenloft setting in Monstrous Compendium Ravenloft Appendix (1991), and was reprinted in Ravenloft Monstrous Compendium I & II (1996).
The scarecrow appeared in Dungeon #84 (January 2001). The scarecrow, the conscious scarecrow, the dread scarecrow, and the quested scarecrow appeared in third edition in Dragon #355 (May 2007).