https://www.alice.cnptia.embrapa.br/alice/handle/item/151 Artigo em periódico indexado (CNPF) 2026-06-12T03:11:55Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187363 Título: Predictive modeling of Rhopalosiphum padi population dynamics in time and space: host effects on management. Autoria: MAURER, T. R.; DONATI, M. R.; MORETTI, J. P.; FERNANDES, J. M. C.; LAZZARETTI, A. T.; WIEST, R.; SUZANA-MILAN, C. S.; LAU, D.; RIEDER, R. Conteúdo: The determination of biological parameters and the spatiotemporal dynamics of insect pests is essential for calibrating simulation models that enable the prediction of population growth and the establishment of warning systems for management actions. In this context, the objective of this study was to quantify variations in biological parameters due to the host (wheat cultivar) and their impacts on the accuracy of the ABISM (Agent-Based Insect Simulation Model). Since the rates of biological processes vary depending on the host plant, life-history parameters were obtained for two wheat cultivars (cv. TBIO Toruk and cv. BRS Belajoia) and compared to those simulated by ABISM. The pre-reproductive period was shorter, and longevity and the number of R. padi nymphs produced were higher in cv. BRS Belajoia compared to cv. TBIO Toruk. Differences were found between observed and ABISM-simulated data, depending on the cultivar, for the variables longevity () and total fecundity (). These differences were expressed in spatial dynamics, with a greater number of plants colonized by R. padi in cv. BRS Belajoia. Differences between cultivars may be associated with anatomical traits, given that cv. BRS Belajoia lacks trichomes, unlike cv. TBIO Toruk. Therefore, there was an effect of cultivar and ambient temperature, and discrepancies between observed and simulated data only for cv. BRS Belajoia. The differences between cultivars, as well as in relation to the model, indicate, for better model accuracy, the use of cultivar-specific parameters considering insect–plant interactions is required. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187333 Título: Fostering green legacy initiative: sustaining seed production for scarce indigenous tree species by identifying, characterizing, and mapping of mother trees in Awi Zone, Northwestern Ethiopia. Autoria: MEGISTU, M. A.; REVILLA-CHÁVEZ, J. M.; SOUZA, B. M. de; LOPES, M. T. G.; AGUIAR, A. V. de Conteúdo: The aim of this study was to identify, characterize, and map mother trees of selected indigenous tree species to tackle shortage of high quality and quantity tree seed provision for massive plantation program by providing both temporal and spatial distribution of mother trees in the study area. This study identifed 90 mother trees across seven indigenous tree species through stratifed purposive sampling, treating each tree as an individual sampling plot to ensure localized data precision. Data on height, girth, and X- Y coordinates of each mother tree, as well as nearby trees within 10 m. Radius from selected mother trees were recorded. Descriptive statistics and coefcient of variance were calculated for the collected data. Following the statistical analysis, the spatial distribution of the mother tree was mapped using ArcGIS software. Juniperus procera in Banja District shows the largest mean both in terms of DBH (116.21 +- 37.3 cm) and height (33.82 +- 4.07 m) while Podocarpus falcatus in Guangua District score the second largest mean for DBH (94.83 +- 15.1 cm) and height (32.28 +- 14.3 m). Prunus africana in Banja District 2 were the third largest from the characterized seed sources by scoring average DBH (91.98 +- 19.71 cm) and height (29.16 +- 6.27 m). The coefcient of variance of selected mother trees both by species and by forest name also indicate the suitability of selected forest for the production of high quality and quantity of tree seed. Spatial mapping and local knowledge were combined to point out specifc seed collection sites, such as Ziqe Forest, and to determine optimal collection times. This research provides a data-driven framework for developing targeted seed sourcing strategies that enhance the genetic resilience of restoration eforts, directly supporting Ethiopia’s national and international reforestation and aforestation commitments. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187053 Título: Sazonalidade na produtividade de miniestacas e rizogênese de genótipos de Ilex paraguariensis A.St.-Hil. Autoria: VIEIRA, L. M.; MAGGIONI, R. de A.; DUARTE, M. M.; AGUIAR, N. S. de; GABIRA, M. M.; TOMASI, J. de C.; KOEHLER, H. S.; WENDLING, I.; ZUFFELLATO-RIBAS, K. C. Conteúdo: A propagação vegetativa da erva-mate (Ilex paraguariensis A.St.-Hil.) é uma técnica importante e que possibilita a manutenção de características de interesse, como alta produtividade e composição química específica. No entanto, essa técnica ainda apresenta limitações e necessita de protocolos eficientes, tanto para a produção de propágulos quanto para o enraizamento. O objetivo desta pesquisa foi avaliar a produtividade de miniestacas, bem como o potencial rizogênico de quinze genótipos de erva-mate com a utilização de ácido indolbutírico em diferentes épocas do ano. A produtividade de miniestacas por m⁻² foi avaliada no momento da coleta dos propágulos, em quatro épocas do ano. Para avaliação da rizogênese, o experimento seguiu o delineamento inteiramente casualizado, em arranjo fatorial triplo (15 genótipos x 4 épocas de coleta x 2 tratamentos de ácido indolbutírico - AIB), com quatro repetições de 10 miniestacas (5 ± 1 cm de comprimento); a base das miniestacas foi imersa em 0 (controle) e 3000 mg L⁻¹ de AIB, por 10 segundos. Após 120 dias em casa de vegetação, foram avaliados: porcentagem de enraizamento, número médio de raízes, retenção foliar e mortalidade. Os dados foram submetidos à análise de variância e as médias comparadas pelo teste de Scott-Knott ao nível de 5% de probabilidade. A maior produtividade de miniestacas por m⁻² foi obtida no genótipo EC21 (até 961,7 miniestacas m⁻²) no verão e na primavera. As porcentagens de enraizamento variaram de 0% a 90%, sendo influenciadas pelo genótipo, estação do ano e uso de AIB. A coleta de primavera proporcionou os maiores índices de enraizamento para a maioria dos genótipos. No outono, a aplicação de AIB favoreceu o enraizamento adventício. Conclui-se que a produtividade e o enraizamento das miniestacas são influenciadas pelo genótipo e estação do ano, assim como a necessidade de AIB depende destes fatores. 2023-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187049 Título: Rooting of araucaria mini-cuttings in different environments and substrates. Autoria: CIPRIANI, V. B.; AGUIAR, N. S.; DUARTE, M. M.; GABIRA, M. M.; BENEDITO, D. C. D.; WENDLING, I. Conteúdo: Araucaria is a native conifer, with high economic importance, especially in the southern region of the Brazil. Considering the difficulties of producing clonal plants of the species, the objective of the study was to determine the influence of different environments and substrates on root formation of Araucaria angustifolia minicuttings. Orthotropics shoots were collected in a mini clonal garden. Minicuttings were prepared with 10 ± 1 cm in length, keeping 1/3 of the needles, and immersed in a hydroalcoholic solution of 3,000 mg L-1 of indolbutyric acid for 10 seconds. Then they were planted in 210 cm³ tubes, testing four different substrates, which are, based on pine bark, vermiculite and charcoal (S1); based on pine bark and vermiculite (S2); based on pine bark, peat and coconut fiber (S3) and based on pine bark, vermiculite, charcoal and carbonized rice husk (S4). These minicuttings were maintained in three different environments for rooting: Automated Greenhouse (CVA) with 80% reduction in luminosity and mist irrigation, Simple Greenhouse House (CVS) with 84% reduction in luminosity and microsprinkler irrigation, and Mini-tunnel (EST) with 90% light reduction and micro sprinkler irrigation. After 120 days, minicuttings survival and rooting were determined. CVA provided better rooting of minicuttings, whereas EST resulted in high mortality and no root formation. There was no influence of the substrates on the evaluated variables. Thus, the use of greenhouses with automated irrigation by misting is recommended for rooting araucaria minicuttings, regardless of the substrate used, although overall rooting rates are not yet considered viable. 2024-01-01T00:00:00Z