Premium
Simazine Residue Levels in Irrigation Water after Ditchbank Application for Weed Control
Author(s) -
Anderson Lars W. J.,
Pringle John C.,
Raines Roger W.,
Sisneros David A.
Publication year - 1978
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1978.00472425000700040022x
Subject(s) - simazine , irrigation , environmental science , weed control , liter , weed , residue (chemistry) , agronomy , chemistry , pesticide , biology , atrazine , endocrinology , biochemistry
A field study was conducted to determine the amount of simazine [2‐chloro‐4,6‐bis(ethylamino)‐ s ‐triazine] likely to be found in irrigation water after ditchbank treatment for weed control. Resulting data are useful in evaluating the potential impact of simazine on crops irrigated from sprayed canals. Canals were selected in California, Colorado, and Washington for the application of simazine to both watered and dewatered sites at rates of 2.25 to 7.43 kg/ha. Simazine levels in flowing canal water immediately after herbicide application did not exceed 60 µ g/liter. In first‐flow samples collected in the spring from the sites that were dewatered at application, simazine levels peaked at about 250 µ g/liter within the treated section but decreased rapidly to <5 µ g/liter.