New formulation of paraquat with lysine acetylsalicylate with low mammalian toxicity and effective herbicidal activity

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Maria Teresa Baltazar (Author) Other; Ricardo Jorge Dinis Oliveira (Author) FMUP; Lucia Guilhermino (Author) ICBAS; Maria de Lourdes Bastos (Author) FFUP; Jose Alberto Duarte (Author) FADEUP; Felix Carvalho (Author) FFUP

Journal

Title: Pest Management Science

Vol. 69

Pages: 553-558

ISSN: 1526-498X

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 13 Citations

Scientific classification

FOS: Agrarian Sciences > Agriculture, Forestry, and Fisheries

Other information

Authenticus ID: P-005-29X

DOI: 10.1002/ps.3412

Abstract (EN): Background Currently, the commercial formulations of the herbicide paraquat are highly toxic to humans, and no effective antidote is available for paraquat poisoning. The aim of the present study was to develop a safe formulation, combining paraquat and the known antidote lysine acetylsalicylate. The toxicity of a mixture of Gramoxone (R) (20% paraquat) and lysine acetylsalicylate in adult Wistar male rats and the herbicidal efficacy against grass lawn (50% of Poa pratensis and 50% of Festuca arundinacea) were evaluated. This new formulation was administered to Wistar rats by gavage at 125 mg kg1 of paraquat ion and lysine acetylsalicylate at 79, 158 or 316 mg kg1 body weight, and the survival rate was observed for 30 days. Results The survival rate of the paraquat group was only 40%, while lysine acetylsalicylate provided effective protection, with full survival observed in the groups that received 125 mg kg1 of paraquat ion and 316 mg kg1 of lysine acetylsalicylate. Both formulations of paraquat, either in the absence or in the presence of lysine acetylsalicylate, provided the same herbicidal activity against the tested herbal species. Conclusions The present formulation of paraquat containing lysine acetylsalicylate, significantly decreases mammalian toxicity while maintaining effective herbicidal activity. (c) 2012 Society of Chemical Industry

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6