Descriptions of two new species of Sphenorhina (Hemiptera, Cercopidae, Tomaspidinae) from the Neotropical region

Description of two new species of Sphenorhina (Hemiptera, Cercopidae, Tomaspidinae) from the Neotropical region. Two new species of Sphenorhina Amyot & Serville, S. pseudoboliviana SP. NOV: from Bolivia and S. plata SP. NOV: from Argentina are described and illustrated.

Sugarcane response to two biotic stressors: Diatraea saccharalis and Mahanarva fimbriolata

In a field experiment in 2007/08 in São Paulo state, Brazil cane was exposed to sugarcane borer (Diatraea saccharalis) and spittlebug (Mahanarva fimbriolata) alone or in combination. Plots comprised 2 m(2) caged and uncaged sugarcane stalks. Compared with the caged (un-infested) control, spittlebug nymphs decreased cane yield by 17.6%, whereas infestation from spittlebug nymphs + sugarcane borer combined and sugarcane borer alone, decreased cane yields by 15.5% and 6.9%, respectively. There was no significant difference among the treatments in levels of soluble solids and cane sucrose content.

Influence of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) injury on the quality of cane juice

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Influência dos estressores bióticos Diatraea saccharalis (Fabr.) (Lepidoptera: Crambidae) e Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) na produtividade e qualidade tecnológica da cana-de-açúcar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Danos causados por Mahanarva fimbriolata (STAL, 1854) na qualidade da cana e processo fermentativo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Infestação de Mahanarva fimbriolata (Stal, 1854) e controle químico na qualidade da matéria-prima e classificação do caldo de cana

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Diatraea saccharalis (Fabr.) (Lepidoptera: Crambidae) e Mahanarva fimbriolata (Stal) (Hemiptera: Cercopidae) em cana-de-açúcar: impacto na qualidade da matéria-prima, açúcar e etanol

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Qualidade da matéria-prima, microbiota fermentativa e produção de etanol sob ataque de Mahanarva fimbriolata em cana-de-açúcar

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cigarrinha-das-raízes em cana-de-açúcar: resistência genotípica e interação planta-praga

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Resistência de variedades de cana-de-açúcar à Cigarrinha-das-raízes Mahanarva fimbriolata (Stål) (Hemiptera, Cercopidae)

Pós-graduação em Agronomia - FEIS

Resistance of Sugarcane Cultivars to Mahanarva fimbriolata (StAyenl) (Hemiptera: Cercopidae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Efeitos da fertirrigação sobre a ocorrência e danos de Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) em cana-de-açúcar

Brazil stands out as the world's largest producer of sugarcane and its productivity is closely related to the availability of water and nitrogen during its development and also to the incidence of pest insects. Among the species most harmful to the sugarcane in Brazil, Mahanarva fimbriolata stands out, which has seriously endangered the yields. In this context, the present study aimed to evaluate the effect of the nitrogen fertirrigation on the incidence and damage caused by M. fimbriolata in sugarcane. The experiment was composed of five treatments and four replications in a randomized block design (RBD). The treatments were composed of four doses of N-fertilizer and control (0, 50, 100, 150, 200 kg.ha-1) in drip irrigation system. The parameters evaluated were: number of nymphs in the roots, stalk productivity, sugar content, percentage of sugar, total recoverable sugar and the agricultural contribution margin. It was observed that the fertirrigation increases the productivity of stalks and sugar with the increase of nitrogen fertilization by irrigation. The use of 200 kg.ha-1 of N-fertilizer increased the incidence of M. fimbriolata up to the control and economic damage levels. The biggest financial yield was obtained with the dose of 150 kg.ha-1 of N-fertilizer.