Consulta: creatorFacets:"Pimentel,Guilherme Vieira"
Registros recuperados: 3
Data/hora: 10/06/2024 09:14:20

A new methodology for large-scale screening sugarcane resistance to Mahanarva Fimbriolata (Hemiptera: Cercopidae)
Provedor de dados: 53
Autores: Valverde,Alejandro Hipólito Pabón; Soares,Bruno Oliveira; Tomaz,Adriano Cirino; Pimentel,Guilherme Vieira; Peternelli,Luiz Alexandre; Barbosa,Márcio Henrique Pereira.
ABSTRACT The sugarcane spittlebug, Mahanarva fimbriolata (Walker) (Hemiptera: Cercopidae) is an economically important pest of sugarcane in Brazil. The purpose of this study was to develop and validate a greenhouse methodology to screen large sugarcane populations for resistance to spittlebug Mahanarva fimbriolata. A resistant and a susceptible genotype (H. Kawandang and SP81-3250) were first used to determine adequate days after infestation and levels of infestation (number of nymphs per plant) for comparing the resistance of genotypes. Then, 74 sugarcane genotypes including three susceptible and three resistant controls were screened for resistance. The screening method consists in infesting single-tiller plants supported in a small plant growth unit and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum sp; Spittlebug; Plant-insect interaction; Nymph damage.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000400599

Adjusting the growth curve of sugarcane varieties using nonlinear models
Provedor de dados: 65
Autores: Jane,Sérgio Alberto; Fernandes,Felipe Augusto; Silva,Edilson Marcelino; Muniz,Joel Augusto; Fernandes,Tales Jesus; Pimentel,Guilherme Vieira.
ABSTRACT: Assessing sugarcane (Saccharum spp.) stalk growth helps to adequately manage the phenological stages of the crop. The aim of this study was to describe the height-growth curve of four sugarcane varieties (RB92579, RB93509, RB931530 and SP79-1011), in irrigated plant-cane and ratoon cane plantations, using the Logistic and Gompertz nonlinear models, while considering all deviations from assumptions. The model parameters were estimated based on the least squares method using the Gauss-Newton algorithm. To select the most suitable model, nonlinear measures, adjusted coefficient of determination (R2 adj), residual standard deviation (RSD), and corrected Akaike information criterion (AICc) were used. Based on the best models, stalk height growth rates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Logistic model; Gompertz model; Growth rates.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300204

Oviposition preference and larval performance of sugarcane borer in eight sugarcane genotypes
Provedor de dados: 64
Autores: Pimentel,Guilherme Vieira; Tomaz,Adriano Cirino; Brasileiro,Bruno Portela; Peternelli,Luiz Alexandre; Barbosa,Márcio Henrique Pereira.
ABSTRACT The sugarcane borer Diatraea saccharalis Fabr. (Lepidoptera: Crambidae) is one of the most important pests of sugarcane in the Americas. The purpose of this study was to assess multiple resistance traits in eight sugarcane genotypes against D. saccharalis, including five commercial cultivars and three exotic germplasm with potential to serve as resistance sources against this pest. The oviposition preference was assessed by using both free-choice and non-choice tests. The performance of both early stage larvae feeding on the leaves and late stages larvae feeding within the stalks were also assessed. There were differences among genotypes for number of both eggs and egg cluster in the free-choice test while no differences in non-choice test were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Diatraea saccharalis; Host-plant resistance.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000400439