Absorption and Translocation of Herbicides

Abstract

Absorption and translocation of herbicides can be significantly increased when adjuvants are added to foliar applied spray mixtures. The level of increased control from adjuvants is usually affected by the environmental conditions at the time of herbicide application. In most cases, herbicide absorption and translocation are greatest under environmental conditions which are most favorable for growth of the treated plant. Adjuvants added to treatment solutions often increase absorption and translocation of foliar applied herbicides, especially when plants are under stress at time of treatment. Inorganic salts in spray solutions also affect absorption, translocation and subsequent toxicity of herbicides. Many inorganic salts with monovalent (+1) cations increase herbicide activity while some salts with divalent (+2) and trivalent (+3) cations inhibit herbicide activity.