Results 261 to 270 of about 251,717 (313)

Persistence of methidathion in soils

Bulletin of Environmental Contamination and Toxicology, 1970
The organophosphorus insecticide, methidathion, degraded rapidly in a sandy loam, silt loam, clay loam and organic soil. Fifty percent of the initial applications decomposed in less than 2 weeks and more than 90% of the insecticide disappeared within 16 weeks. When soils were treated with methidathion containing(14)C in the ring or methyl side chain 40
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Persistence of Hookworm Larvae in Soil

The American Journal of Tropical Medicine and Hygiene, 1953
Summary Eighteen enclosed units of soil were inoculated with equal numbers of hookworm eggs and dampened daily until larvae reached the infective stage. Half were then dampened daily and half left to dry until their turns came to be sampled. Sampling, which began on the 5th day in the wet series and on the 9th day in the dry, was progressive and ...
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Persistence of fensulfothion in soil

Journal of Environmental Science and Health, Part B, 1977
Abstract Persistence of Fensulfothion (O,O‐diethyl‐O‐(p‐methyl sulfinyl) phenyl phosphorothioate) in soil under laboratory conditions was followed using 3 day old larvae of the silkworm, Bombyx mori L. and also by cholinesterase inhibition method. Low concentrations i.e., 50–175 ppm persisted for about 50–60 days whereas high concentrations (250–500 ...
S. Sheela, V.N. Vasantharajan
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Metribuzin Persistence in Soil

Weed Science, 1977
The persistence of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazine-5(4H)-one] in several soils from the lower alluvial floodplain of the Mississippi River was studied in the greenhouse and laboratory using bioassay and gas chromatographic methods of residue detection.
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Persistence of triazine herbicides in soils

1970
Although phytotoxic residues of the triazine herbicides are objectionable when, in some soils and under some environmental conditions, sensitive plants are injured the season after application, residual activity is essential for weed control and soil sterilization.
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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.
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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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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
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Persistence of D.D.T. and Benzene Hexachloride in Soils

Annals of Applied Biology, 1948
Acid and alkaline soils, both alone and mixed with 2 % of D.D.T. or 2 % of benzene hexa‐chloride (mixed isomers, containing 10% of the γ‐isomer) have been exposed outdoors or subjected to controlled leaching in the laboratory. Residual insecticide has been estimated at intervals by a method involving dehydrohalogenation, and determinations have also ...
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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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