Irrigation with Water Contaminated by Sugarcane Pesticides and Vinasse Can Inhibit Seed Germination and Crops Initial Growth

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Ogura, Allan Pretti ; Moreira, Raquel Aparecida ; Menezes da Silva, Lais Conceicao ; Negro, Giovana Spinelli ; Freitas, Juliane Silberschmidt ; da Silva Pinto, Thandy Junio ; de Palma Lopes, Lais Fernanda ; Cardoso Yoshii, Maria Paula ; Goulart, Bianca Veloso ; Montagner, Cassiana Carolina ; Gaeta Espindola, Evaldo Luiz

• Tipo de documento: Artigo Científico
• Fonte: Archives of Environmental Contamination and Toxicology; v. 82, n. 3, p. 11-pg., 2022-02-09.

Resumo

Sugarcane crops are dependent on chemicals for maintaining plantations. Therefore, environmental consequences concern adjacent areas that can be affected by contaminants in common use, including pesticides and vinasse (i.e., a by-product from the ethanol industry). This study aimed to evaluate phytotoxicity through two plant bioassays with water from mesocosms contaminated with the herbicide 2,4-D (447.0 mu g L-1), the insecticide fipronil (63.5 mu g L-1), and sugarcane vinasse (1.3%). First, the germination test (4 d) with Eruca sativa L. assessed water samples collected three times after the contamination (2 h, 14 d, and 30 d), considering germination, shoot, and root growth. The results from this bioassay indicated higher phytotoxicity for 2,4-D as it fully inhibited the shoot and root growth even in low concentrations (0.2 mu g L-1). However, no significant effect was reported for fipronil and vinasse. Also, the 2,4-D effects drastically decreased due to an expressive concentration reduction (99.4% after 30 d in mixture with vinasse). Second, the irrigation test with Phaseolus vulgaris L. and Zea mays L. considered shoot and root growth and biomass under 21 days after plants emergence. The herbicide 2,4-D inhibited the initial growth of tested species, especially the roots (up to 45% inhibition). Furthermore, sugarcane vinasse caused harmful effects on plant growth (up to 31% inhibition). Therefore, our data showed that these contaminants could inhibit plant germination and initial growth under our tested conditions. These evaluations can endorse risk assessments and water management in sugarcane crops surrounding areas. (AU)

• Processo FAPESP: 17/13377-6 - Avaliação dos efeitos ecotoxicológicos de agroquímicos utilizados em pastagens e em culturas de cana-de-açúcar sobre anfíbios.
• Beneficiário: Juliane Silberschmidt Freitas
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/24126-4 - Efeitos dos pesticidas fipronil e 2,4-d isoladamente e em mistura, sobre espécies nativas da biota aquática neotropical
• Beneficiário: Raquel Aparecida Moreira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado