Publicações - ciências agrárias
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BAIXO, BRUNA TEIXEIRA;
Adriano Thibes Hoshino;
DE OLIVEIRA, LUCIANO MENDES;
RODRIGUES, MILLENA DOS SANTOS;
PEREIRA, HELTER CARLOS;
MENEZES JÚNIOR, AYRES DE OLIVEIRA;
ANDROCIOLI, HUMBERTO GODOY
Palavra-chave:
Phaseolus vulgaris;
neotropical brown stink bug;
reproductive structure abortion;
grain type;
carioca type bean;
phytophagous insect
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Fitossanidade; Entomologia Agrícola
resumo ...
This study evaluated the susceptibility of common bean (Phaseolus vulgaris L.) cultivars to Euschistus heros feeding across various phenological stages. Three cultivars (IPR Curió, IPR Sabiá, and IPR Urutau) were infested with 0.5 insects per plant for eight days starting at anthesis and 8, 16, 24, 32, and 40 days after flowering (DAF) using a randomized block design with five replicates. E. heros did not significantly impact grain yield or reproductive abscission, except for the IPR Curió cultivar during flowering, which demonstrated substantial qualitative damage. Feeding injury resulted in increased grain punctures and the grading of commercial classification to Type 2. The most critical susceptibility period occurred during the grain-filling stages (16–24 DAF). IPR Curió was the most sensitive cultivar, exhibiting Type 2 status at both 16 and 24 DAF. These findings demonstrate that although common beans exhibit quantitative tolerance to E. heros at the tested density, qualitative damage during grain development significantly compromises marketability and value. Integrated Pest Management (IPM) should prioritize protecting the crop during mid-to-late reproductive stages to ensure that grain quality standards are met.
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SILVA, THIAGO CARDOSO;
Márcio Pereira da Rocha;
KLITZKE, RICARDO JORGE;
MONTEIRO, THIAGO CAMPOS;
CONTI JUNIOR, JOSÉ LUIZ FERRARESSO;
GUARANÁ, EMMANOELLA;
MASCARENHAS, ADRIANO REIS PRAZERES
Palavra-chave:
forest stands;
log quality;
wood production;
Eucalyptus urophylla × Eucalyptus grandis;
Eucalyptus saligna
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Tecnologia e Utilização de Produtos Florestais; Madeira Serrada;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Tecnologia e Utilização de Produtos Florestais; Processamento Mecânico da Madeira
resumo ...
This study focused on the characterization of Eucalyptus spp. raw materials to produce sawn wood, considering four genetic materials planted at different spacings. Seven-year-old forest stands were evaluated in the Nelder arrangement. Three hybrids of E. urophylla × E. grandis and one variety of E. saligna were selected, planted at three spacings (3.0 m × 3.0 m; 6.0 m × 3.0 m; and 8.5 m × 3.0 m). Trees were evaluated for size, shape, deformations, heartwood, bark, and quality. Tree and log characteristics were influenced by genetics, spacing, emphasizing selection for quality and sustainability in sawn wood production. E. urophylla × E. grandis had greater height and volume but more stress and cracks than E. saligna . Among the genetic materials tested, E. urophylla × E. grandis II showed superior characteristics for sawn wood production. The 3.0 m × 3.0 m spacing yielded higher wood volume per area, albeit with smaller tree dimensions. The 6.0 m × 3.0 m spacing resulted in trees with shapes like the 8.5 m × 3.0 m spacing, producing logs with comparable taper, bark thickness, heartwood percentage, and volume per area. Therefore, one of these larger spacings is recommended to produce Eucalyptus spp. wood for sawmills.
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WALGER, ERIC CEZAR DE CAMARGO;
LONGHI-SANTOS, TOMAZ;
João Ricardo Dittrich
Palavra-chave:
Cadeia produtiva de mel
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Zootecnia; Produção Animal; Manejo de Animais
resumo ...
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RUEDIGER, JULIANNA;
Adriano Thibes Hoshino;
OLIVEIRA, LUCIANO MENDES;
DELALIBERA, HEVANDRO COLONHESE;
ANDROCIOLI, HUMBERTO GODOY;
Mauricio U. Ventura
Palavra-chave:
Insect attraction;
insect behavior;
pest monitoring;
phototaxis
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Fitossanidade; Entomologia Agrícola
resumo ...
(en)
The maize leafhopper Dalbulus maidis (Hemiptera: Cicadellidae) is a key pest and vector of pathogens in Latin American maize, and its monitoring in the field currently relies mainly on yellow sticky traps, which present handling difficulties and low selectivity. This study evaluated LED-based light traps with different spectra and internal colors as alternatives for monitoring D. maidis while minimizing captures of non-target insects. Field trials were conducted in maize crops in Londrina, Paraná State, Brazil, in March 2023 and May 2025. The experimental design was a randomized complete block factorial (4 × 2 + 1): four light spectra × two internal trap colors + yellow sticky trap, in five temporal replicates. Traps were baited with LEDs emitting 372, 402 or 409 nm, or warm-white light (3000 K), and had either a white or black internal surface. Warm-white LEDs combined with a white internal surface captured 69-fold (2023) and 81-fold (2025) more D. maidis adults than yellow sticky traps; whereas 372 and 409 nm yielded captures similar to those of yellow traps. Spectra at 402 nm with a white background produced intermediate increases. Predatory insects were rarely captured (<1.5 individuals per trap on average) and did not differ among spectra or internal colors. Warm-white traps with white background also captured the highest numbers of other cicadellids, whereas moths were predominantly attracted to 402 and 409 nm, with relatively low capture under warm-white light. Overall, warm-white LED traps with a white internal background substantially improved D. maidis capture compared with yellow sticky traps, with minimal impact on predators and reduced moth capture. This configuration is a promising option for enhancing maize leafhopper monitoring in the field, although the high attraction of other leafhopper species may constrain its use in future automated detection systems.
(pt)
The maize leafhopper Dalbulus maidis (Hemiptera: Cicadellidae) is a key pest and vector of pathogens in Latin American maize, and its monitoring in the field currently relies mainly on yellow sticky traps, which present handling difficulties and low selectivity. This study evaluated LED-based light traps with different spectra and internal colors as alternatives for monitoring D. maidis while minimizing captures of non-target insects. Field trials were conducted in maize crops in Londrina, Paraná State, Brazil, in March 2023 and May 2025. The experimental design was a randomized complete block factorial (4 × 2 + 1): four light spectra × two internal trap colors + yellow sticky trap, in five temporal replicates. Traps were baited with LEDs emitting 372, 402 or 409 nm, or warm-white light (3000 K), and had either a white or black internal surface. Warm-white LEDs combined with a white internal surface captured 69-fold (2023) and 81-fold (2025) more D. maidis adults than yellow sticky traps; whereas 372 and 409 nm yielded captures similar to those of yellow traps. Spectra at 402 nm with a white background produced intermediate increases. Predatory insects were rarely captured (<1.5 individuals per trap on average) and did not differ among spectra or internal colors. Warm-white traps with white background also captured the highest numbers of other cicadellids, whereas moths were predominantly attracted to 402 and 409 nm, with relatively low capture under warm-white light. Overall, warm-white LED traps with a white internal background substantially improved D. maidis capture compared with yellow sticky traps, with minimal impact on predators and reduced moth capture. This configuration is a promising option for enhancing maize leafhopper monitoring in the field, although the high attraction of other leafhopper species may constrain its use in future automated detection systems.
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Luciano Mendes de Oliveira;
Rodolfo Bianco;
Adriano Thibes Hoshino;
MAURICIO URSI VENTURA;
Pablo Ricardo Nitsche;
IVAN BORDIN;
Ayres de Oliveira Menezes Junior;
Humberto Godoy Androcioli
Palavra-chave:
green-belly stink bug;
Zea mays;
contagious distribution;
IPM;
presence?absence;
decision making
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Fitossanidade; Entomologia Agrícola
resumo ...
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MAYER, MARCO ANTONIO;
SCHUSTER, MAURICIO ZAVONELLO;
CORTEZE, ANA PAULA;
DOMINSCHEK, RUBIA;
BARROSO, ARTHUR ARROBAS MARTINS;
Aníbal de Moraes;
DE FACCIO CARVALHO, PAULO CÉSAR;
DE OLIVEIRA, LEANDRO BITTENCOURT
Palavra-chave:
persistence;
Diversity;
crop rotation
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Fitotecnia; Forragicultura;
CIENCIAS_AGRARIAS; Agronomia; Sistemas integrados
resumo ...
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DOUGLAS TOMACHEWSKI;
RILLIG, M. C.;
ETTO, R.M.;
SOUZA, R. F.;
LAMMEL, D. R.;
SCHIEBELBEIN, L. M.;
Carolina Weigert Galvão;
RIBEIRO, M. F.;
KARAS, L. P.;
Franklin Galvão;
Baura, V. A.
Palavra-chave:
Soil microbial ecology;
Tropical forest;
SUSTAINABLE FORESTRY;
Tree-bacteria interactions;
Ecosystem Services
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Ecologia; Ecologia e Conservação de Ecossistemas Vegetais
resumo ...
The Brazilian Atlantic Forest, a critical biodiversity hotspot, plays a vital role in climate regulation and water conservation. To explore the relationship between tree diversity and soil bacterial communities, soil samples were collected along an edapho-climatic gradient. We hypothesized that tropical forest soils, among Earth’s most complex biological environments, exhibit predictable microbial community assembly patterns driven by deterministic processes. Specifically: (i) tree composition influences bacterial communities more strongly than abiotic factors when environmental heterogeneity is low, following niche-based assembly rules; (ii) specific tree taxa function as keystone species, shaping bacterial communities through microhabitat modification. Our findings indicate that tree diversity had a greater influence on shaping bacterial communities than soil attributes. Of the 72 tree species identified, Senegalia recurva, Araucaria angustifolia, Styrax acuminatus, Ilex paraguaiensis, Eugenia subterminalis, and Pisonia ambigua were key drivers of soil bacterial diversity. Additionally, late-successional tree species that require high light were closely linked to predicted microbial cycling of carbon, nitrogen, sulfur, and phosphorus. These results offer a hypothesis-generating framework for evaluating species selection in Atlantic Forest restoration projects, suggesting that these species represent candidates whose effects can enhance soil health and ecosystem functionality in reforestation programs.
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ALMADA GOMES, KARLA MAYARA;
Afonso Figueiredo Filho;
MELO, LIA DE OLIVEIRA;
BEHLING, ALEXANDRE;
Henrique Soares Koehler
Palavra-chave:
Amazon rainforest;
natural regeneration;
silvicultural practices;
Forest management
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Manejo Florestal; Dendrometria e Inventário Florestal;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Técnicas e Operações Florestais; Exploração Florestal;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Fisiologia Florestal
resumo ...
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MIRANDA DUARTE, GABRIELY;
MOCROSKI, DRIELLY146;OLIVEIRA CORREA, ALAN;
SILVA ALVES DE LIMA, MARCOS VINÍCIUS;
DANIELA BIONDI
Palavra-chave:
floresta urbana;
mobilidade;
Calçadas
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Conservação da Natureza; Arborização Urbana;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Conservação da Natureza; Recuperação de Areas Degradadas;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Fisiologia Florestal
resumo ...
(en)
The complexity of the urban landscape demands, among others, careful planning of street tree planting, as the inappropriate choice of species and incorrect management can compromise accessibility. Thus, this study conducted a qualitative and quantitative survey in the Alto da Glória neighborhood, Curitiba-PR, evaluating trees in terms of botanical identification, bifurcation, roots, and tortuosity, as well as their environment, including location, pavement type, and sidewalk dimensions. A total of 882 tree individuals were analyzed, with L. indica being the most frequent species. A correlation was observed between tortuosity and bifurcation height, indicating that trees with irregular bifurcation height often showed trunk tortuosity, a characteristic that negatively affects mobility on the streets. Root exposure outside the planting area was found, especially in large-sized species that are generally not recommended for street tree planting, such as A. colubrina, T. tipu J. mimosifolia, L.styraciflua, A. negundo and M. azedarach. The quality of sidewalks was compromised by inappropriate and non-standardized pavement types, non-compliant dimensions, and especially by root exposure affecting the sidewalks. This study concludes that the inadequate selection of tree species and a lack of knowledge about their growth characteristics negatively impact pedestrian flow, particularly for people with reduced mobility. The careful selection of species, proper tree management, and the implementation of planting beds with appropriate dimensions are essential to mitigate negative impacts and promote more accessible, inclusive, and well-treed cities.
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A complexidade da paisagem urbana demanda um planejamento criterioso da arborização viária, uma vez que a escolha inadequada de espécies e o manejo incorreto de árvores pode comprometer a qualidade do desenvolvimento urbano e seus demais parâmetros. Dentre esses, destaca-se a necessidade de compatibilizar as espécies arbóreas inseridas em ruas e calçadas e sua capacidade em prover desafios a acessibilidade e caminhabilidade para os cidadãos. Trazendo esse panorama para o bairro Alto da Glória, em Curitiba – Paraná (PR), este estudo tem por finalidade compreender a adequabilidade de parâmetros técnicos da arborização do bairro perante a critérios de acessibilidade, trazendo para si características dendrométricas e urbanísticas. Foram analisados 882 indivíduos arbóreos, destacando-se L. indica L. como a espécie mais frequente. Observou-se uma correlação entre tortuosidade e altura de bifurcação, indicando que árvores com altura de bifurcação irregular frequentemente apresentavam tortuosidade no fuste, características que afetam negativamente a mobilidade nas vias. Foi verificado o afloramento de raízes fora da área de canteiro, especialmente de espécies de grande porte, reconhecidamente não recomendadas para arborização viária, como A. colubrina (Vell.) Brenan, T. (Benth.) Kuntze, J. mimosifolia D. Don, L.styraciflua L., A. negundo L. e M. azedarach L.. A qualidade das calçadas foi comprometida por revestimentos inadequados e não padronizados, além de dimensões fora das diretrizes preconizadas pela ABNT e, sobretudo, pelo afloramento de raízes afetando as calçadas. Este estudo conclui que a escolha inadequada de espécies arbóreas e o desconhecimento das suas características de desenvolvimento impactam negativamente o fluxo de pedestres, especialmente para pessoas com mobilidade reduzida. A seleção cuidadosa das espécies, o manejo adequado das árvores e a implementação de canteiros com dimensões apropriadas são essenciais para mitigar os impactos negativos e promover cidades mais acessíveis, inclusivas e bem arborizadas.
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Afonso Takao Murata;
MOREIRA, LETÍCIA;
ROCHA, GABRIELLY SCREMIN;
MURATA, MARILIA PINTO FERREIRA
Palavra-chave:
Educação Ambiental;
Agroecologia
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agroecologia; Princípios agroecológicos
resumo ...
(en)
This article discusses an environmental education project for students from the sixth year of elementary to the third year of high school carried out at the Casemiro Karman State School that is located in the city of Campo Largo in the state of Paraná, metropolitan region of Curitiba, promoted by the Center for Teaching, Research and Extension in Agroecology (CEPEA) of the Federal Unit of Paraná. The project took place on August 8, 2023 through a free extension event and had as its main subject the composting and making of home composters to contribute to the organic garden that is located at the school and to expand students' learning about sustainability, with a theoretical and a practical part, using the action research methodology. Thus, two questionnaires were carried out, one with an investigative character to understand what was already known by the participants and another with an evaluative character, after the event, to conclude whether the objectives of the project were achieved. With the analysis of the questionnaires, it was possible to conclude that the event made the students expand their domains about composting, considering that after the event, on average, 90% of the participants stated that they had an enriching experience with the project and that they will certainly apply sustainable practices in their routines, in this way, demonstrating the importance of environmental education in children and adolescents since they are proactive and how composting can be effective as a learning tool in this age group.
(pt)
O presente artigo discorre sobre um projeto de educação ambiental para alunos de sexto ano do fundamental ao terceiro ano do ensino médio realizado no Colégio Estadual Casemiro Karman que está localizada na cidade de Campo Largo no estado do Paraná, região metropolitana de Curitiba, promovido pelo Centro de Ensino, Pesquisa e Extensão em Agroecologia (CEPEA) da Unidade Federal do Paraná. O projeto ocorreu dia 08 de agosto de 2023 por meio de um evento de extensão gratuito e teve como principal assunto a compostagem e a confecção de composteiras domésticas para contribuição na horta orgânica que se encontra no colégio e para expandir o aprendizado dos alunos sobre sustentabilidade, com uma parte teórica e outra prática, utilizando a metodologia de pesquisa-ação. Assim, foram realizados dois questionários, um com caráter investigativo para compreender o que já era de conhecimento prévio dos participantes e outro com caráter avaliativo, após o evento, para concluir se os objetivos do projeto foram atingidos. Com análise dos questionários foi possível concluir que o evento fez com que os alunos ampliassem seus domínios acerca a compostagem tendo em vista que após o evento, em média, 90% dos participantes afirmaram terem tido uma experiência enriquecedora com o projeto e que com certeza irão aplicar as práticas sustentáveis em suas rotinas, dessa maneira, demonstrando a importância da educação ambiental em crianças e adolescentes já que os mesmos são proativos e como a compostagem pode ser efetiva como ferramenta de aprendizado nessa faixa etária.
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