Mo. Rev. Stat. § 272.200
All lands, within this state, upon which sorghum or other poisonous crops are planted shall be enclosed by the owners and occupiers with a good and lawful fence so as to prevent horses, cattle or other stock that may receive injury thereby from having access thereto; provided, that a lawful fence as used in this section shall be construed to mean such fences as are described elsewhere in this chapter and that the same penalties for damages as provided in section 272.160 shall be recoverable under this section; provided further, that this law shall not apply to counties and townships that have or may hereafter adopt a stock law.
(RSMo 1939 § 14588)