Consulta: creatorFacets:"Berghetti,Juliano"
Registros recuperados: 5
Data/hora: 27/07/2024 01:55:25

Eficiência de malhas amostrais utilizadas na caracterização da variabilidade espacial de fósforo e potássio
Provedor de dados: 65
Autores: Cherubin,Maurício Roberto; Santi,Antônio Luis; Eitelwein,Mateus Tonini; Menegol,Diego Ricardo; Ros,Clóvis Orlando Da; Pias,Osmar Henrique de Castro; Berghetti,Juliano.
O objetivo do trabalho foi estudar a eficiência das malhas amostrais, utilizadas nas áreas manejadas com agricultura de precisão, para a caracterização da variabilidade espacial dos teores de fósforo (P) e potássio (K). O estudo foi conduzido em 30 áreas agrícolas, localizadas no Rio Grande do Sul, cujos solos foram classificados como Latossolos Vermelhos. As dimensões das malhas amostrais estudadas foram: 100x100m (10 áreas), 142x142m (10 áreas) e 173x173m (10 áreas). Foram analisados os teores de P e K na profundidade de 0,00-0,10m. Os dados foram submetidos à análise estatística descritiva e a análise geoestatística. De modo geral, as áreas estudadas apresentaram teores médios de P e K adequados ao desenvolvimento das culturas. Entretanto, observaram-se...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultura de precisão; Amostragem de solo; Fertilidade do solo; Geoestatística; Latossolos.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000300007

Incidence of stalk rots in corn hybrids influenced by sowing time and nitrogen rates
Provedor de dados: 53
Autores: Berghetti,Juliano; Casa,Ricardo Trezzi; Ferreira,Evandro Zacca; Zanella,Eduardo José; Scheidt,Bruno Tabarelli; Sangoi,Luis.
ABSTRACT Stalk rots compromise the translocation of water and nutrients, affecting grain filling. This study aimed to quantify the incidence of stalk rots in corn hybrids depending on sowing time and nitrogen topdressing rate, and to assess any correlation with grain yield. The experiment was conducted under field conditions in Atalanta, Santa Catarina state, Brazil, using a split-split-plot randomized block design. The hybrids AG 9025 PRO3 (super-early) and 30F53 VYH (early) were sown in the preferential (September 20) and late (December 5) sowing seasons with four nitrogen rates (0, 150, 300, and 450 kg·ha–1). The population density was 75,000 plants·ha–1 andthe nitrogen topdressing was carried out at the V4, V8, and V12 stages. The fungus Colletotrichum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Colletotrichum graminicola; Nitrogen fertilization; Stalk diseases.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300371

Sampling grids for monitoring Euschistus heros infestation in soybean
Provedor de dados: 53
Autores: Pias,Osmar Henrique de Castro; Cherubin,Maurício Roberto; Berghetti,Juliano; Kuss,Cassiano Carlos; Santi,Antônio Luis; Basso,Claudir José.
ABSTRACT Euschistus heros is one the most important pest insect in soybean fields in Brazil. Therefore, site-specific management applied for controlling E. heros can result in economic and environmental benefits. However, sampling protocols for assessing spatialtemporal variability of this soybean pest and, then, for guiding a more sustainable pest management, were still unknown. Thus, the objective of this study was to compare the efficiency of sampling grid sizes for monitoring the spatial variability of E. heros infestation along the soybean reproductive stages. Nine sampling campaigns were carried out using the beating sheet method, from R2 to R7 soybean phenological stages. It was used a sampling grid of 10 × 10 m, totaling 338 points in an soybean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical brown stink bug; Pest sampling protocol; Spatio-temporal variability; Precision agriculture.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300386

Symptoms of Fusarium graminearum infection in irrigated rice grains
Provedor de dados: 65
Autores: Scheidt,Bruno Tabarelli; Berghetti,Juliano; Zanella,Eduardo José; Casa,Ricardo Trezzi; Bevilaqua,Diego; Ludwig,André Henrique.
ABSTRACT:  The fungus Fusarium graminearum was one of the first pathogens described as causing infections in rice; however, in Brazil, there is no description of its occurrence in panicles. The present study aimed to describe the symptoms caused by F. graminearum infection in irrigated rice grains. The experiment was conducted in a greenhouse in duplicate using the irrigated rice cultivar SCS 121CL and hybrid INOV CL at the R4 (flowering) stage. Two isolate of Fusarium graminearium species complex 15A (F. graminearium - 15-ADON) and FmNiv (F. meridionale - Nivalenol), was inoculated onto panicles by spraying with macroconidia and the development of symptoms was monitored until harvest. There was no difference in symptoms among isolates. Light brown spots...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryzae sativa; Gibberella zeae; Infection of grains; Symptomology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000300152

Transmission of Microdochium albescens from seeds to seedlings in the pre-germinated cultivation system of irrigated rice
Provedor de dados: 65
Autores: Scheidt,Bruno Tabarelli; Garcia,Jaquelini; Casa,Ricardo Trezzi; Coelho,Cileide Maria Medeiros; Bogo,Amauri; Berghetti,Juliano.
ABSTRACT: The fungus Microdochium albescens is one of the main pathogens associated with irrigated rice seeds in southern Brazil. The objective of the present study was to quantify the transmission of M. albescens from naturally infected seeds to the crown, coleoptile, and first true leaf of the seedlings of six cultivars growing in pre-germinated cultivation system of irrigated rice. Seeding was carried out on a water-saturated substrate, using four untreated seed lots for each of the six cultivars. At 14 days after sowing, the crown, coleoptile, and first true leaf of the seedlings were carefully highlighted, and the samples were disinfected and plated onto potato-sucrose-agar culture medium. M. albescens was transmitted asymptomatically to crown,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Gerlachia oryzae; Infected seed; Transmission rate.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200151