STP1312

    Plant Response to Octylphenol and Secondary Alcohol Ethoxylates

    Published: Jan 1996


      Format Pages Price  
    PDF Version (152K) 10 $25   ADD TO CART
    Complete Source PDF (3.8M) 10 $63   ADD TO CART


    Abstract

    Experiments were conducted to determine plant response to octylphenol ethoxylate (OPEO) and secondary alcohol ethoxylate (SAEO) surfactants. Plant species evaluated were barley and green foxtail (grass species) and kochia, redroot pigweed, and potato (broadleaf species). Droplet spread on adaxial leaf surface varied with surfactant hydrophilic:lipophilic balance (HLB) and plant species. Droplet spread was most pronounced with low HLB surfactants (8 to 13), with little or no droplet spread occurring with surfactants of intermediate to high HLB (13.5 to 18). Droplet spread was greatest on kochia, intermediate on barley and green foxtail, and least on redroot pigweed. Plant species differed in their susceptibility to surfactants. Foliar injury by SAEO was greatest to green foxtail (36%) at HLB 14.5, while foliar injury by OPEO was greatest to redroot pigweed (25%) at HLB 14.6. Foliar injury was greater with surfactants of intermediate HLB (13.5 to 15.8) than of low (8 to 12.4) or high (17.3 to 18) HLB. Germinating seedling biomass was reduced more by surfactants with HLB values of 8 to 14.5 than those with HLB values of 15.4 to 18. Electrolyte leakage from potato cells was greatest with SAEO surfactant with HLB value of 12.1 and with OPEO surfactant with HLB value of 13.5.

    Keywords:

    Surfactant phytotoxicity, cell membrane permeability, droplet spread, electroconductivity


    Author Information:

    Manthey, FA
    Research Scientist, Visiting Scientist, Professor, and Agricultural Research Technician, North Dakota State University, Fargo, ND

    Szelezniak, EF
    Research Scientist, Visiting Scientist, Professor, and Agricultural Research Technician, North Dakota State University, Fargo, ND

    Nalewaja, JD
    Research Scientist, Visiting Scientist, Professor, and Agricultural Research Technician, North Dakota State University, Fargo, ND

    Davidson, JD
    Research Scientist, Visiting Scientist, Professor, and Agricultural Research Technician, North Dakota State University, Fargo, ND


    Paper ID: STP11352S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP11352S


    CrossRef ASTM International is a member of CrossRef.