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Soil persistence studies with [ 14 C]MCPA in combination with other herbicides and pesticides
Author(s) -
SMITH ALLAN E.
Publication year - 1982
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.1365-3180.1982.tb00156.x
Subject(s) - mcpa , trifluralin , loam , chemistry , bromoxynil , dicamba , mecoprop , soil water , agronomy , metribuzin , pesticide , horticulture , weed control , biology , ecology
Summary The persistence of [ 14 C]MCPA at a rate equivalent to 1 kg ha −1 was studied under laboratory conditions in a clay loam, heavy clay and sandy loam at 85% of field capacity moisture and 20±1°C both alone and in the presence of tri‐allate, trifluralin, tri‐allate and trifluralin, malathion, Vitaflow DB, malathion and Vitaflow DB, bromoxynil, bromoxynil and asulam, bromoxynil and difenzoquat, dicamba, dicamba and mecoprop, linuron, MCPB, metribuzin, propanil, TCA, benzoylprop‐ethyl, diclofop‐methyl, and flamprop‐methyl. Except in the soils treated with asulam, the half‐lives of [ 14 C]MCPA in all three soil types were similar, being approximately 13±1 days, thus indicating that none of the other chemicals studied adversely affected the soil degradation of MCPA. In the asulam treated soils, the half‐lives of the MCPA were about 3 days longer than in non‐asulam treated soils; the effect was most marked in the clay loam.