Premium
Herbicide dissipation studies in southern forest ecosystems
Author(s) -
Michael Jerry L.,
Neary Daniel G.
Publication year - 1993
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620120303
Subject(s) - imazapyr , environmental science , hexazinone , picloram , streams , triclopyr , ephemeral key , clopyralid , hydrology (agriculture) , ecosystem , glyphosate , ecology , forestry , agronomy , geography , biology , weed control , geology , computer network , geotechnical engineering , computer science
Results of research on the movement of hexazinone, imazapyr, picloram, and sulfometuron in first‐order watersheds in the southern United States are presented. Herbicides contaminate surface waters to varying degrees, depending on application rate, method of application, product formulation, and site‐specific characteristics. Highest concentrations are observed in streams in ephemeral pulses during the first three storm events after application. Streamside management zones greatly reduce the amount of herbicide entering streams from forestry applications. Soil persistence of herbicides is highly variable and a function of many site characteristics. Plant residues have been monitored and found to dissipate rapidly, with half‐lives < 40 d.