Nonionic Surfactant Properties Affect Enhancement of Herbicides

2009 ◽  
pp. 278-278-10
Author(s):  
FA Manthey ◽  
M Czajka ◽  
JD Nalewaja
Keyword(s):  
Nonionic Surfactant ◽  
Surfactant Properties

Nonionic Surfactant Properties of Amphiphilic Hyperbranched Polyglycerols

Langmuir ◽  
2020 ◽  
Vol 36 (34) ◽  
pp. 10103-10109 ◽  
Author(s):  
Brenda Andrade ◽  
Samuel N. Knewstub ◽  
Keith Harris ◽  
Christopher J. Tucker ◽  
Joshua S. Katz ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Surfactant Properties

Study of Methionine and Cumene Hydroperoxide Reaction Kinetics in the Presence of Nonionic Surfactant

2020 ◽  
Vol 57 (5) ◽  
pp. 427-433
Author(s):  
Lusine Harutyunyan ◽  
Gohar Petrosyan ◽  
Romik Harutyunyan
Keyword(s):  
Nonionic Surfactant ◽  
Reaction Kinetics ◽  
Cumene Hydroperoxide

Extraction of rare earth metals from trichloroacetate solutions in the presence of linear polyoxonium compounds

1991 ◽  
Vol 56 (8) ◽  
pp. 1585-1592 ◽  
Author(s):  
Petr Vaňura
Keyword(s):  
Rare Earth ◽  
Nonionic Surfactant ◽  
Separation Factor ◽  
Rare Earth Metals ◽  
Extraction Constants ◽  
Distribution Constants ◽  
Factor Α

Extraction of rare earth metals from lithium trichloroacetate solutions ( 1.20-2.88 mol l-1) with solutions of the commercial nonionic surfactant Slovafol 909 (p-nonylphenylnonaethylene glycol) in chloroform and dichloromethane was investigated. The extraction constants as well as the Slovafol 909 distribution constants were determined in the water-dichloromethane and water-chloroform systems. The lanthanide distribution ratios decrease with their atomic numbers first rather rapidly (approximately to Sm): the separation factor αSmLa = 1.54 and 1.87 in dichloromethane and in chloroform, respectively; for lanthanides with higher atomic numbers the drop is less pronounced (αLuLa = 2.42 and 2.85 in the two solvents, respectively).

Safety and efficacy of linuron with or without an adjuvant or S-metolachlor for POST control of Palmer amaranth (Amaranthus palmeri) in sweetpotato

2021 ◽  
pp. 1-18
Author(s):  
Levi D. Moore ◽  
Katherine M. Jennings ◽  
David W. Monks ◽  
Ramon G. Leon ◽  
David L. Jordan ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Weed Control ◽  
Critical Period ◽  
Total Yield ◽  
Field Studies ◽  
Palmer Amaranth ◽  
Amaranthus Palmeri ◽  
Foliar Injury ◽  
Protoporphyrinogen Oxidase ◽  
Safety And Efficacy

Abstract Field studies were conducted to evaluate linuron for POST control of Palmer amaranth in sweetpotato to minimize reliance on protoporphyrinogen oxidase (PPO)-inhibiting herbicides. Treatments were arranged in a two by four factorial where the first factor consisted of two rates of linuron (420 and 700 g ai ha−1), and the second factor consisted of linuron applied alone or in combinations of linuron plus a nonionic surfactant (NIS) (0.5% v/v), linuron plus S-metolachlor (800 g ai ha−1), or linuron plus NIS plus S-metolachlor. In addition, S-metolachlor alone and nontreated weedy and weed-free checks were included for comparison. Treatments were applied to ‘Covington’ sweetpotato 8 d after transplanting (DAP). S-metolachlor alone provided poor Palmer amaranth control because emergence had occurred at applications. All treatments that included linuron resulted in at least 98 and 91% Palmer amaranth control 1 and 2 wk after treatment (WAT), respectively. Including NIS with linuron did not increase Palmer amaranth control compared to linuron alone, but increased sweetpotato injury and subsequently decreased total sweetpotato yield by 25%. Including S-metolachlor with linuron resulted in the greatest Palmer amaranth control 4 WAT, but increased crop foliar injury to 36% 1 WAT compared to 17% foliar injury from linuron alone. Marketable and total sweetpotato yield was similar between linuron alone and linuron plus S-metolachlor or S-metolachlor plus NIS treatments, though all treatments resulted in at least 39% less total yield than the weed-free check resulting from herbicide injury and/or Palmer amaranth competition. Because of the excellent POST Palmer amaranth control from linuron 1 WAT, a system including linuron applied 7 DAP followed by S-metolachlor applied 14 DAP could help to extend residual Palmer amaranth control further into the critical period of weed control while minimizing sweetpotato injury.

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