Results 71 to 80 of about 2,178 (118)

Adsorption, desorption and persistence of fomesafen in soil

Pest Management Science, 2018
AbstractBACKGROUNDFomesafen provides control of glyphosate‐resistant Palmer amaranth in cotton but frequent seedling injury has been reported. This study evaluated soil adsorption, desorption, and field persistence of fomesafen.RESULTSThe Freundlich distribution coefficient (Kf) for fomesafen on seven US soils varied from 1.30 to 9.28 µg1–1/n g−1 mL1/n.
Xiao Li, Timothy Grey, Katilyn Price, William Vencill, Theodore Webster   +4 more
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Persistence of herbicides in soil

Crops & Soils, 2016
While it is desirable for the chemicals to control weeds during the season of application, it is not desirable for them to persist and affect subsequent crop growth. Factors that determine the length of time herbicides persist fall into three categories: soil factors, climatic conditions, and herbicidal properties.
openaire   +1 more source

Persistent C in Soils

Mineralogical Magazine, 1998
There is general agreement that in many soils some C compounds persist for centuries and perhaps millenia, particularly deep in the soil profile. Various chemistries and mechanisms of stabilization of C compounds have been proposed to explain their longevity in soils.
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The fate and persistence of polychlorinated biphenyls in soil

Journal of Environmental Monitoring, 1999
The fate and persistence of PCBs 28, 52, 101, 138, and 180 artificially introduced into three soils was studied under a variety of field conditions for up to 415 d following initial contamination. A relationship was detected between ln Koa (octanol/air partition coefficient) and the experimentally observed first-order loss rate constant that was ...
S, Ayris, S, Harrad
openaire   +2 more sources

Persistence of chlorpyrifos in a mineral and an organic soil

Journal of Environmental Science and Health, Part B, 1980
Chlorpyrifos (Lorsban emulsifiable concentrate) was applied at 3.4 kg AI/ha and incorporated into sand and muck soil contained in small field plots. Soil samples were taken at intervals over 2 yr. Radishes and carrots, seeded yearly, served as indicator crops for absorption of insecticide residues.
R A, Chapman, C R, Harris
openaire   +2 more sources

Persistence of Chlorinated Hydrocarbon Insecticides in Soils

Science, 1967
The percentages of technical aldrin, chlordane, endrin, heptachlor, Dilan, isodrin, BHC, and toxaphene remaining in Congaree sandy loam soil after 14, years were 40, 40, 41, 16, 23, 15, 10, and 45, respectively; those of purified aldrin and technical dieldrin after 15 years were 28 and 31, respectively; and the percentage of technical DDT in three ...
R G, Nash, E A, Woolson
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Persistence of chlorfenvinphos in soils

Pesticide Science, 1975
AbstractThe persistence and behaviour of chlorfenvinphos, an organophosphorus insecticide, was studied on different soils. On a peaty soil the insecticide was only very slowly degraded, there being 70% of the applied dose remaining after 21 weeks and 30% after nearly 12 months. On the sandy soils, however, persistence was much shorter; between 3 and 15%
openaire   +1 more source

Movement and persistence of aldicarb in certain soils

Archives of Environmental Contamination and Toxicology, 1977
When the rate of movement and the persistence of aldicarb in 4 types of soils were investigated in laboratory and field studies some leaching was detected in coarse sand; however, leaching was quite limited in clay loam and muck soils. These data indicated that aldicarb degraded quite rapidly in the selected soils and most of the applied radioactivity ...
J R, Coppedge, D L, Bull, R L, Ridgway
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Persistence of pronamide in soil

Pesticide Science, 1970
AbstractUnder field conditions, there was little loss of herbicidal activity following spring application of pronamide when the soil temperature remained below about 13°c, but under normal summer conditions loss was rapid (half‐life 2–4 weeks). The rate of loss was retarded when the surface soil became very dry.
openaire   +1 more source

Persistence of hexaconazole, a triazole fungicide in soils

Journal of Environmental Science and Health, Part B, 2000
Persistence of hexaconazole (2-(2,4-dichlorophenyl)- 1-(1H-1,2,5-triazol-1-yl) hexan-2-ol) was studied in alluvial, red and black soils under flooded and nonflooded conditions. This fungicide was more persistent in all soils under flooded conditions than under nonflooded conditions and at 27 degrees C than at 35 degrees C.
N, Singh, P, Dureja
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