Results 221 to 230 of about 45,444 (264)

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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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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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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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 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.
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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
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EDB: persistence in soil

Science, 1987
J J, Pignatello, B L, Sawhney, C R, Frink   +2 more
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Persistence of azinphosmethyl in soil

Bulletin of Environmental Contamination and Toxicology, 1975
D C, Staiff, S W, Comer, J F, Armstrong, H R, Wolfe   +3 more
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