Leaching of insecticides used in blueberry production and their toxicity to red worm

Hulbert, Daniel and Raja Jamil, Raja Zalinda and Isaacs, Rufus and Vandervoort, Christine and Erhardt, Susan and Wise, John (2020) Leaching of insecticides used in blueberry production and their toxicity to red worm. Chemosphere, 241. p. 125091. ISSN 0045-6535

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Official URL: https://doi.org/10.1016/j.chemosphere.2019.125091

Abstract

Soil columns were collected from a blueberry field, and insecticide solutions were allowed to leach through these columns. Insecticides from four different chemical classes were applied at two different rates: the concentration at which the insecticides wash off blueberries under rainfall conditions and the labeled field rate at which they are sprayed. The soil columns were divided into thirds; top, middle and bottom. Soil bioassays using Eisenia foetida Savigny, as an indicator species, were set up to determine the toxicity of the insecticides at a top, middle and bottom layer of the soil column. The mass of E. foetida was also measured after the bioassay experiment was completed. The concentrations at which insecticides wash-off of blueberries from rainfall were not lethal to E. foetida. In order to support mortality data, insecticide residues were quantified in the soil layers for each insecticide. Under field rate leaching conditions, carbaryl showed the high levels of toxicity in the top and middle layers of soil suggesting that it has the highest risk to organisms from leaching. This study will help blueberry growers make informed decisions about insecticide use, which can help minimize contamination of the environment. © 2019 Elsevier Ltd

Item Type: Article
Uncontrolled Keywords: Pesticide leaching; Red worm; Blueberry; Soil
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Q Science > QH Natural history
T Technology > TP Chemical technology
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Centre for Research in Biotechnology for Agriculture
Depositing User: MR Faizal II H
Date Deposited: 20 Oct 2015 03:20
Last Modified: 11 Nov 2019 03:58
URI: http://eprints.um.edu.my/id/eprint/14209

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