Pesticides in the Environment: Impacts and Challenges in Agriculture

A special issue of Agriculture (ISSN 2077-0472). This special issue belongs to the section "Ecosystem, Environment and Climate Change in Agriculture".

Deadline for manuscript submissions: closed (5 January 2025) | Viewed by 1597

Special Issue Editor


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Guest Editor
Department of Biological Science, College of Science and Engineering, Sangji University, Wonju-si 26339, Republic of Korea
Interests: bioremediation; soil microorganism ecology; risk assessment of GMO; bacterial taxonomy

Special Issue Information

Dear Colleagues,

Pesticides which enter the soil environment are subject to various degradative processes. The overall degradation of a pesticide from soil results from a combination of mechanisms, such as microbial degradation, chemical hydrolysis, photolysis, volatility, leaching, and surface runoff. The degree to which each mechanism will contribute to the overall degradation of the pesticide is in turn dependent on the physicochemical properties of the pesticide, the characteristics of the soil (pH, organic matter content, microbial biomass, and redox status), environmental conditions (temperature and moisture), and management practices (application rate and formulation type). There are complex interactions and interdependencies within each of these variables, which are difficult to quantify in situ.

Most pesticides cause adverse effects when reaching soil organisms. The intensity of the toxic effect varies with time, dose, organism characteristics, environmental presence, or pesticide characteristics. Their presence in environments determines the dose and time at which an organism is exposed, and could represent a hazard for worldwide life due to their mobility. Hence, the persistence in the environment leads to a risk for life; the more persistent a pesticide is, the worse its environmental impact.

In that sense, this Special Issue aims to understanding bioremediation as applied to a wider range of contaminated sites and chemicals.

Prof. Dr. Dong-Uk Kim
Guest Editor

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Keywords

  • bioremediation
  • biodegradation
  • agriculture
  • pesticides

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Published Papers (1 paper)

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Research

21 pages, 4072 KiB  
Article
Effect of Adjuvants on Physical–Chemical Properties, Droplet Size, and Drift Reduction Potential
by Sérgio Basílio, Marconi Ribeiro Furtado Júnior, Cleyton Batista de Alvarenga, Edney Leandro da Vitória, Beatriz Costalonga Vargas, Salvatore Privitera, Luciano Caruso, Emanuele Cerruto and Giuseppe Manetto
Agriculture 2024, 14(12), 2271; https://doi.org/10.3390/agriculture14122271 - 11 Dec 2024
Cited by 2 | Viewed by 1222
Abstract
Adjuvants alter the physical–chemical properties of pesticide formulations, influencing either the droplet size or drift phenomenon. Selecting the appropriate adjuvant and understanding its characteristics can contribute to the efficiency of Plant Protection Product (PPP) application. This reduces drift losses and promotes better deposition [...] Read more.
Adjuvants alter the physical–chemical properties of pesticide formulations, influencing either the droplet size or drift phenomenon. Selecting the appropriate adjuvant and understanding its characteristics can contribute to the efficiency of Plant Protection Product (PPP) application. This reduces drift losses and promotes better deposition on the crop. The objective of this study was to evaluate the effects of four commercial adjuvants based on mineral oil (Agefix and Assist), vegetable oil (Aureo), and polymer (BREAK-THRU) on the physical–chemical properties (surface tension, contact angle, volumetric mass, electrical conductivity, and pH), droplet size, and drift, using pure water as the control treatment (no adjuvant). Surface tension and contact angle were measured with a DSA30 droplet shape analyzer, while droplet size measurements were determined through a laser diffraction particle analyzer (Malvern Spraytec), using a single flat fan spray nozzle (AXI 110 03) operating at 0.3 MPa. Drift reduction potential was evaluated inside a wind tunnel with an air speed of 2 m s−1. All adjuvants reduced surface tension and contact angle compared to water. volumetric median diameter (VMD) increased for Aureo, Assist, and Agefix, generating coarse, medium, and medium droplets, respectively, while BREAK-THRU formed fine droplets, similar to those generated by water. Aureo had the greatest reduction in Relative Span Factor (RSF), with a reduction of 30.3%. Overall, Aureo, Assist, and Agefix adjuvants significantly reduced the percentage of droplets <100 µm and increased those >500 µm. Drift reduction potential was achieved for all adjuvants, with Aureo showing the highest reduction of 59.35%. The study confirms that selecting the appropriate adjuvant can improve PPP application and promote environmental sustainability in agricultural practices. Full article
(This article belongs to the Special Issue Pesticides in the Environment: Impacts and Challenges in Agriculture)
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