Phytotoxicity of Bensulide and Trifluralin in Several Soils
- 1 March 1970
- journal article
- research article
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 18 (2), 244-247
- https://doi.org/10.1017/s0043174500079662
Abstract
Seedlings of 19 plant species were grown in soils containing 0 to 1,000 ppm ofO,O-diisopropyl phosphorodithioateS-ester withN-(2-mercaptoethyl)benzenesulfonamide (bensulide) or 0 to 100 ppm ofa,a,a-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) to determine phytotoxicity. Standard growth curves were constructed. The concentration of bensulide required to reduce the growth of shoots 50% (GR50) ranged from 1 ppm with barnyardgrass (Echinochloa crusgalli(L.) Beauv.) to more than 1,000 ppm with carrot (Daucus carotaL., var. Long Imperator). Several plant species were more sensitive to bensulide in a Hidalgo sandy loam (pH 8.1) than in other soils including a Delfina loamy fine sand (pH 6.0). The concentration of trifluralin required to reduce the growth of shoots 50% (GR50) was not markedly affected by soil texture and ranged from 0.1 ppm with German millet (Setaria italica(L.) Beauv.) to more than 100 ppm with Long Imperator carrot. The standard growth curves have been used to quantify herbicidal activities in field soils.Keywords
This publication has 5 references indexed in Scilit:
- Selectivity, Movement, and Persistence of Soil-Incorporated Herbicides in Carrot PlantingsWeed Science, 1970
- Bioassay for Bensulide, DCPA, and Siduron in TurfgrassWeed Science, 1969
- The Influence of Soil Characteristics on the Adsorption and Phytotoxicity of SimazineWeed Science, 1968
- Residue of Bensulide in Turfgrass Soil Following Annual Treatments for Crabgrass Control1Agronomy Journal, 1967
- Soil Components Determining Bensulide PhytotoxicityAgronomy Journal, 1966