Artigo em periódico indexado (CNPMA) https://www.alice.cnptia.embrapa.br/alice/handle/item/223 2026-05-21T23:15:54Z 2026-05-21T23:15:54Z SILVA, A. M. da TERAO, D. SILVA, I. S. O. MAIA, A. de H. N. MELO, W. L. de B. NECHET, K. de L. HALFELD-VIEIRA, B. de A. VILELA, E. S. D. FRACAROLLI, J. A. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1186510 2026-05-09T15:12:50Z 2026-01-01T00:00:00Z

Título: Modulated UV-C radiation as an innovative strategy for postharvest disease control and quality preservation in papaya and orange fruits. Autoria: SILVA, A. M. da; TERAO, D.; SILVA, I. S. O.; MAIA, A. de H. N.; MELO, W. L. de B.; NECHET, K. de L.; HALFELD-VIEIRA, B. de A.; VILELA, E. S. D.; FRACAROLLI, J. A. Conteúdo: Abstract: Postharvest losses remain a major challenge in fruit production systems, affecting both climacteric fruits, such as papaya, and non-climacteric fruits, such as orange. Ultraviolet-C (UV-C) radiation has emerged as a sustainable alternative to chemical fungicides; however, its effectiveness depends on the applied dose and radiation delivery mode. This study investigated the comparative effects of continuous and frequency-modulated UV-C radiation on postharvest disease control and fruit quality on papaya and orange. Two independent experiments were conducted. Experiment 1 evaluated the influence of modulation frequencies (0, 15, 30, and 45 Hz) on disease progression, while Experiment 2 combined the most effective frequencies with different exposure times to define optimal treatment conditions. In papaya, UV-C modulation at 30 Hz/20 s (0.44 kJ m⁻²) provided effective control of anthracnose (67% reduction in incidence), while minimizing photothermal damage, with no visible epidermal injuries. In orange, continuous UV-C radiation (0 Hz) applied for 30 s (1.99 kJ m⁻²), completely suppressed sour rot development (100%) without visible peel injury. Therefore, the selection of the UV-C radiation application mode is species-specific. Notably, modulation of UV-C irradiation has demonstrated enhanced efficiency in postharvest disease control while reducing epidermal burn. Additionally, the treatments stimulated defense responses, as evidenced by increased activities of phenylalanine ammonia-lyase, polyphenoloxidase, peroxidase, and catalase. Physicochemical analyses confirmed the maintenance of firmness, acidity, and color stability, indicating the preservation of postharvest quality in both fruits. Overall, modulated UV-C radiation represents a promising non-chemical postharvest technology, enabling efficient disease control while maintaining fruit quality.

2026-01-01T00:00:00Z WILCKEN, C. F. SOLIMAN, E. P. SA, L. A. N. de BARBOSA, L. R. DIAS, T. K. R. FERREIRA-FILHO, P. J. OLIVEIRA, R. J. R. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1186227 2026-04-12T01:36:04Z 2010-01-01T00:00:00Z

Título: Bronze bug Thaumastocoris peregrinus carpinteiro and dellapé (Hemiptera: Thaumastocoridae) on Eucalyptus in Brazil and its distribution. Autoria: WILCKEN, C. F.; SOLIMAN, E. P.; SA, L. A. N. de; BARBOSA, L. R.; DIAS, T. K. R.; FERREIRA-FILHO, P. J.; OLIVEIRA, R. J. R. Conteúdo: The bronze bug Thaumastocoris peregrinus Carpintero & Dellapé (Hemiptera: Thaumastocoridae) was detected infesting Eucalyptus trees in Brazil in 2008, in the states of Sao Paulo, Rio Grande do Sul and Minas Gerais and in 2009 was found in the state of Espírito Santo, Mato Grosso do Sul, Rio de Janeiro and Paraná. Details about geographical spread, means of introduction, impact in Eucalyptus plantations and natural enemies observed in the field are discussed.

2010-01-01T00:00:00Z XAVIER, M. G. B. RAMOS FILHO, L. O. ASSIS, R. L. de MORAIS, G. F. de https://www.alice.cnptia.embrapa.br/alice/handle/doc/1185854 2026-03-28T12:05:23Z 2026-01-01T00:00:00Z

Título: O potencial das redes multi-atores no desenvolvimento de sistemas agroflorestais: o caso da Rede Agroflorestal da Região de Ribeirão Preto e da rede de sistemas agroflorestais agroecológicos do sul do Brasil. Autoria: XAVIER, M. G. B.; RAMOS FILHO, L. O.; ASSIS, R. L. de; MORAIS, G. F. de Conteúdo: Este artigo analisa o papel das redes sociais multiatores no desenvolvimento de sistemas agroflorestais no Brasil, com foco em dois casos de estudo: a Rede Agroflorestal de Ribeirão Preto (Estado de São Paulo) e a Rede de Sistemas Agroflorestais Agroecológicos do Sul do Brasil (Rede SAFAS-Estados do Rio Grande do Sul, Santa Catarina e Paraná). Por meio de uma metodologia qualitativa baseada em análise documental, examinamse as dinâmicas de cooperação entre agricultores familiares, pesquisadores, instituições públicas e outros atores sociais. Destacase como essas redes contribuem para o fortalecimento da transição agroecológica ao fomentar a troca de conhecimentos, a inovação social e a articulação de políticas públicas que apoiam práticas sustentáveis. Os resultados indicam que essas redes são essenciais para superar desafios comuns, como o acesso limitado a mercados, insumos e assistência técnica especializada. Além disso, atividades coletivas, como macro-oficinas, oficinas participativas e campanhas de conscientização, demonstraram ser ferramentas eficazes para promover a cocriação de soluções em diversos territórios. Apesar das limitações financeiras e institucionais, as redes multiatores emergem como espaços de aprendizagem e inovação cruciais para a viabilidade dos sistemas agroflorestais. Este estudo contribui para o debate sobre como as redes sociais podem desempenhar um papel estratégico na transição para modelos agrícolas mais resilientes e sustentáveis no Brasil.

2026-01-01T00:00:00Z PARAIBA, L. C. QUEIROZ, S. C. do N. de SOUZA, D. R. C. de MORICONI, W. PAZIANOTTO, R. A. A. JONSSON, C. M. PARAÍBA, C. C. M. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1185503 2026-03-21T13:33:29Z 2025-01-01T00:00:00Z

Título: Bioconcentration factor of fungicides in soybean grains. Autoria: PARAIBA, L. C.; QUEIROZ, S. C. do N. de; SOUZA, D. R. C. de; MORICONI, W.; PAZIANOTTO, R. A. A.; JONSSON, C. M.; PARAÍBA, C. C. M. Conteúdo: Abstract: Controlling phytopathogenic fungi in soybean crops (Glycine max L) is necessary and requires several types of fungicides, however, some of these pesticides can accumulate in soybeans. The bioconcentration factor (BCF) is a metric that indicates the degree of affinity of a substance for an organism. The BCF of the fungicides azoxystrobin, cyproconazole, epoxiconazole, and pyraclostrobin in soybeans from plants grown in pots, were estimated. Estimation was performed from concentrations of fungicides observed in the soil solution and in soybeans. Soybeans were exposed to fungicides by applications of the fungicides in the soil contained in pots. The average quantified concentrations in the grain samples were 6.21 µg/kg (azoxystrobin), 45.25 µg/kg (cyproconazole) and 10.47 µg/kg (epoxiconazole). The experimental value of BCF of fungicides varied between 0.044 L/kg (azoxystrobin) and 0.175 L/kg (epoxiconazole). With the estimated BCF values, the hypothetical concentrations of the fungicides in the soil solution that could translocate in the plant and exceed the maximum residue limits (MRLs) in soybean were then estimated. These concentrations were 11.36 µg/ml (azoxystrobin), 0.82 µg/ml (cyproconazole), and 0.28 µg/ml (epoxiconazole). BCF values and the acceptable daily intake (ADI) values of fungicides allows to estimate the risk of consuming a quantity of soybeans that provides a fungicide human intake greater than the ADI.

2025-01-01T00:00:00Z