Evaluating the release-weighted risk of insecticides under rainy conditions: A case study in Iran

Authors: Deihimfard, Reza¹; Zand, Eskandar²; Soufizadeh, Saeid¹; Kambouzia, Jafar¹; Mirzaei Talarposhti, Reza¹; Ebrahimi, Meysam³

Source: Archives of Agronomy and Soil Science, Volume 55, Number 3, June 2009 , pp. 327-343(17)

Publisher: Taylor and Francis Ltd

Abstract:

A modified chemical ranking and scoring method entitled the CHEMS (Chemical Hazard Evaluation for Management Strategies) model was used to yield a relative weighted risk for insecticides used in the northern areas of Iran. The CHEMS model uses six toxicity and three exposure potential parameters to measure the overall hazard of a substance. The results suggest that Diazinon (granule [GR] 10%) was ranked as a high spot for release-weighted risk in this study although its relatively low risk score (RS) compared to other insecticides, which is due to its high volume consumption. The highest-priority insecticides for future action (the ones that present the highest weighted risk score [WRS]) would include Fipronil, Thiodicarb and Azinphos-methyl. Cartap identified as a hazardous insecticide regarding aquatic organisms and might threaten the natural aquatic ecosystems in these areas if continually used. Thiodicarb had the highest effect on human health. This study showed that a chemical with low RS but high environmental loading and usage and medium persistence (i.e. Cartap) can pose a low WRS. Results of the CHEMS model in this study could help guide a prospective monitoring study, thereby assisting risk managers with managing more efficiently, resources dedicated to mitigating risks posed by insecticides in the northern parts of Iran.

Keywords: pesticide; hazard; release-weighted risk; CHEMS model

Document Type: Research article

DOI: http://dx.doi.org/10.1080/03650340802516465

Affiliations: 1: Department of Agroecology, Environmental Sciences Research Institute, Shahid Beheshti University, Tehran 2: Department of Weed Research, Iranian Plant Protection Research Institute, Tehran 3: Department of Agronomy, Faculty of Agriculture, Shiraz University, Shiraz, Islamic Republic of Iran

Publication date: 2009-06-01

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