are effective herbicidal agents useful for the control of a wide variety of undesirable plant species those compounds are effective for controlling weeds native to both dry land and wet land areas when applied to the foliage thereof or to soil or water containing seeds or other propagating organs thereof such as stolons tubers or rhizomes at rates of from about 0 016 to 4 0 kg ha and preferably from about 0 1 to 2 0 kg ha while the substituted pyridine compounds of this invention are effective for controlling undesirable plant species when employed alone they may also be used in combination with other biological chemicals including other herbicides the formula i compounds of this invention may be applied to crops in the form of a solid or liquid herbicidal composition comprising a herbicidally effective amount of the formula i compound dispersed or dissolved in an agronomically acceptable inert solid or liquid carrier the compositions may be applied as preemergence or postemergence treatments the formula i compounds may be formulated as emulsifiable concentrates wettable powders granular formulations flowable concentrates and the like in order to facilitate a further understanding of the invention the following examples are presented primarily for the purpose of illustrating more specific details thereof the invention should not be deemed limited by the examples as the full scope of the invention is defined in the claims.