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Persistence studies with [ 14 C] 2,4‐D in soils previously treated with herbicides and pesticides
Author(s) -
SMITH ALLAN E.
Publication year - 1980
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1980.tb00083.x
Subject(s) - trifluralin , loam , persistence (discontinuity) , soil water , pesticide , chemistry , malathion , agronomy , picloram , carbamate , horticulture , biology , ecology , organic chemistry , geotechnical engineering , engineering
Summary: The persistence of [ 14 C] 2,4‐D at a rate equivalent to 1 kg/ha was compared under laboratory conditions in samples of heavy clay, sandy loam, and clay loam at 85% of field capacity moisture and 20 ± 1°C which had either received no pre‐treatment, or had been pre‐treated for 7 days at the 2 μg/g level with the herbicides benzoylprop‐ethyl, diclofop‐methyl, dinitramine, flamprop‐methyl, nitrofen, picloram, tri‐allate, trifluralin, and a combination of tri‐allate and trifluralin. The breakdown of [ 14 C] 2,4‐D was also studied in the same soils that had similarly received pre‐treatments of 2 μg/g of the cereal seed dressing Vitaflo‐DB, the insecticide, malathion, and a combination of Vitaflo‐DB and malathion. In each soil type, the half‐life of the 2,4‐D was similar regardless of whether the soil had, or had not, received any pre‐treatment, indicating that none of the chemicals investigated adversely affected the soil degradation of 2,4‐D.