Assessing single effects of sugarcane pesticides fipronil and 2,4-D on plants and soil organisms

Author(s)

Triques, Maria Carolina ^{[1, 2]} ; Oliveira, Dayane ^{[1, 2]} ; Goulart, Bianca Veloso ^[3] ; Montagner, Cassiana Carolina ^[3] ; Gaeta Espindola, Evaldo Luiz ^{[1, 2]} ; de Menezes-Oliveira, Vanessa Bezerra ^{[1, 2, 4, 5]}

Affiliation

^[1] Univ Sao Paulo, Sao Carlos Engn Sch, NEEA CRHEA SHS, Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Engn Sch, PPG SEA, Sao Carlos, SP - Brazil

^[3] Univ Estadual Campinas, Inst Chem, Analyt Chem Dept, Campinas, SP - Brazil

^[4] Fed Univ Sao Carlos UFSCar, Biotechnol & Environm Monitoring Postgrad Program, CCTS, Campus Sorocaba, Sorocaba, SP - Brazil

^[5] Fed Univ Tocantins UFT, Coordinat Environm Engn, Palmas, Tocantins - Brazil

• Document type: Journal article
• Source: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY; v. 208, JAN 15 2021.
• Web of Science Citations: 0

Abstract

The continuous growth in global population since the beginning of the 20th century result in the necessity of food and energy provision favoring the intensive use of agricultural products such as pesticides. Although pesticides are important to prevent losses in the conventional chemically based agriculture, they frequently present side effects, which goes against agricultural production. The use of pesticides cause direct and indirect effects to soil organisms unbalancing essential soil processes (e.g. primary production, organic matter decomposition, nutrient cycling). Under tropical conditions, very little is known regarding the effects of pesticides to terrestrial organisms. Hence, the aim of the present study was to assess the ecotoxicological effects of the herbicide DMA (R) 806 BR (active ingredient: 2,4-D) and the insecticide Regent (R) 800 WG (active ingredient: fipronil), on terrestrial plant species (the dicot Raphanus sativus var. acanthioformis and the monocot Allium cepa), and soil invertebrates (the collembolan Folsomia candida and the enchytraeid Enchytraeus crypticus), using natural (NS) and artificial soils (TAS). For both pesticides, negative effects on non-target species were observed at concentrations lower than the doses recommended to prevent pests in sugarcane fields. For both soils, the dicot species was the most affected by the herbicide (R. sativus > A. cepa > F. candida > E. crypticus) and the collembolan species was the most affected by the insecticide (F. candida > E. crypticus = R. sativus = A. cepa). Although the order of the organisms' sensitivity for both pesticides was the same in both soils, results showed that the extent of the effects was soil dependent. Considering the ecologically relevant concentrations tested, and their severe effects to non-target organisms, it may be concluded that the use of fipronil and 2,4-D under recommended conditions may pose a risk to the terrestrial environment. (AU)

• FAPESP's process: 17/04858-0 - The production of bioethanol in Brazil and its consequence to the terrestrial ecosystem
• Grantee: Vanessa Bezerra de Menezes Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral