Effects of surfactants on propanil penetration through adaxial epidermis of Commelina communis

• Published in: Journal of Pesticide Science 1989/08/20, Vol.14(3), pp.301-306
• Main Authors: Omokawa, H. (Utsunomiya Univ. (Japan). Coll. of Agriculture), Nakayama, H, Konnai, M
• Format: Article
• Language: English
• Subjects: ACCION DE LOS PLAGUICIDAS; ACTION DES PESTICIDES; Biological and medical sciences; Chemical control; COMMELINA; EPIDERME; EPIDERMIS; Fundamental and applied biological sciences. Psychology; HERBICIDAS; HERBICIDE; HERBICIDES; Parasitic plants. Weeds; PESTICIDE ACTIONS; Phytopathology. Animal pests. Plant and forest protection; SURFACE ACTIVE AGENTS; SURFACTANT; SURFACTANTES; Weeds
• ISSN: 0385-1559; 1348-589X; 1349-0923
• DOI: 10.1584/jpestics.14.301

The penetration of propanil through the adaxial epidermis of Commelina communis L. with/without surfactants was examined in a solution/membrane/water system. The penetration was linear with time. A nonionic surfactant enhanced the penetration more than anionic and cationic surfactants at 100ppm. The promotive effect was greater when a nonionic surfactant was added at 100ppm than at 1000ppm. The initial penetration rates were 6.7-442pmol/mm2/hr depending on the adaxial epidermis used. The log equation of the penetration (a) after treatment and the initial penetration (a0) were in good correlation: loga=1.176+0.5282 loga0, r2=0.978. The promotive effect (n=a/a0) was log n=1.176-0.4718 loga0. These results indicate that surfactants enhanced the penetration of propanil through the adaxial epidermis in the solution/membrane/water system and that the enhancement was weak when pore penetration was a main route, and strong when membrane penetration was a predominant route.