Uptake and translocation of non-ionised pesticides in the emergent aquatic plant parrot feather Myriophyllum aquaticum

A - Papers appearing in refereed journals

De Carvalho, R. F., Bromilow, R. H. and Greenwood, R. 2007. Uptake and translocation of non-ionised pesticides in the emergent aquatic plant parrot feather Myriophyllum aquaticum. Pest Management Science. 63 (8), pp. 798-802.

AuthorsDe Carvalho, R. F., Bromilow, R. H. and Greenwood, R.
Abstract

The uptake of four 14 C-labelled non-ionised compounds, the methyl carbamoyloxime insecticide/nematicide oxamyl and three model phenylureas, from solution by rooted stems of the aquatic plant parrot feather [Myriophyllum aquaticum (Vell.) Verdc], together with translocation to the emergent shoots, was measured over periods of 24 and 48 h. Uptake into the submerged tissues of roots and stem base could be ascribed to two processes: movement into the aqueous phase of cells and then partitioning onto the plant solids. This latter process was related to lipophilicity (as measured by the 1-octanol/water partition coefficient, K-ow) and gave rise to high uptake rates of the most lipophilic compounds. Translocation to shoots was passive and was optimal at log K-ow similar to 1.8, at which the efficiency of translocation of compound was about 40% of that of water. This optimum log K-ow was identical to that observed previously in barley, although the translocation efficiency was somewhat less in parrot feather. Solvation parameters were applied to model uptake and translocation of a set of ten compounds by barley with the particular objective of understanding why translocation efficiency is lower at log K-ow > 1.8. (c) 2007 Society of Chemical Industry.

KeywordsAgronomy; Entomology
Year of Publication2007
JournalPest Management Science
Journal citation63 (8), pp. 798-802
Digital Object Identifier (DOI)doi:10.1002/ps.1394
PubMed ID17573679
Open accessPublished as non-open access
Funder project or codeCentre for Sustainable Pest and Disease Management (PDM)
Project: 4386
ISSN1526498X
PublisherWiley

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