Barley yellow dwarf virus-PAV in Brazil: seasonal fluctuation and biological characteristics

Parizoto, G.; Rebonatto, Adriane; Schons, Jurema; Lau, Douglas

doi:10.1590/s1982-56762013000100002

Cited by 36 publications

(33 citation statements)

References 8 publications

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“…The other species had a frequency less than 1%. Rhopalosiphum padi and M. dirhodum species were the most frequent and, possibly, the most important aphids which influence YDD epidemics, which was also observed in studies in South Brazil (Parizoto et al, 2013), where 92.6% BYDV were transmitted by R. padi. Knowing the predominant species in each region is extremely important, since aphid species have different capacity of virus transmission.…”

Section: Resultssupporting

confidence: 71%

“…Considering the current aphid population levels in winter cereals in Brazil, the greatest damage is indirect, arising from the transmission of yellow dwarf disease (YDD) (Kennedy & Connery, 2005). This disease is caused by Luteovirus and Polerovirus species (family Luteoviridae), specially Barley yellow dwarf virus (BYDV)-PAV the predominant species (Mar et al, 2013;Parizoto et al, 2013). Nowadays, aphid species frequently found in Southern Brazil are Rhopalosiphum padi (Linnaeus, 1758) and Sitobion avenae (Fabricius, 1794), both efficient vectors of BYDV-PAV (Parizoto et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…This disease is caused by Luteovirus and Polerovirus species (family Luteoviridae), specially Barley yellow dwarf virus (BYDV)-PAV the predominant species (Mar et al, 2013;Parizoto et al, 2013). Nowadays, aphid species frequently found in Southern Brazil are Rhopalosiphum padi (Linnaeus, 1758) and Sitobion avenae (Fabricius, 1794), both efficient vectors of BYDV-PAV (Parizoto et al, 2013). The higher the R. padi incidence on winter cereals, the lower the grain yield, if no control is used (Fabre et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Protective effect and economic impact of insecticide application methods on barley

Stoetzer

Kawakami

Júnior

et al. 2014

Pesq. agropec. bras.

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-The objective of this work was to evaluate the protective effect of different forms of insecticide application on the transmission of yellow dwarf disease in barley cultivars, as well as to determine the production costs and the net profit of these managements. The experiments were carried out during 2011 and 2012 growing seasons, using the following managements at main plots: T1, seed treatment with insecticide (ST) + insecticide on shoots at 15-day interval; T2, just ST; T3, insecticide applied on shoots, when aphid control level (CL) was reached; T4, without insecticide; and T5, ST + insecticide on shoots when CL was reached. Different barley cultivars -BRS Cauê, BRS Brau and MN 6021 -were arranged in the subplots. Insecticides lambda cyhalothrin (pyrethroid) and thiamethoxam (neonicotinoid) were used. There were differences on yellow dwarf disease index in both seasons for the different treatments, while damage to grain yield was influenced by year and aphid population. Production costs and net profit were different among treatments. Seed treatment with insecticide is sufficient to reduce the transmission of yellow dwarf disease in years with low aphid population pressure, while in years with larger populations, the application of insecticide on shoots is also required.Index terms: Hordeum vulgare, Metopolophium dirhodum, Rhopalosiphum padi, seed treatment, yellow dwarf disease. Efeito protetor e impacto econômico de métodos de aplicação de inseticidas em cevadaResumo -O objetivo deste trabalho foi avaliar o efeito protetor de diferentes formas de aplicação de inseticida sobre a transmissão do nanismo amarelo em cultivares de cevada, bem como determinar os custos de produção e o lucro líquido destes manejos. Os experimentos foram realizados durante as safras 2011 e 2012, tendo-se utilizado os seguintes manejos nas parcelas principais: T1, tratamento de sementes com inseticida (TS) + inseticida na parte aérea aplicado quinzenalmente; T2, apenas TS; T3, inseticida aplicado à parte aérea, quando foi atingido o nível de controle de afídeos (NC); T4, sem inseticida; e T5, TS + inseticida na parte aérea, quando o NC foi atingido. As subparcelas foram constituídas de diferentes cultivares de cevada: BRS Cauê, BRS Brau e MN 6021. Foram utilizados os inseticidas lambda-cialotrina (piretroide) e thiametoxam (neonicotinoide). Houve diferenças no índice de doença do nanismo amarelo em ambas as safras para os diferentes manejos, enquanto o dano ao rendimento de grãos foi influenciado pelo ano e pela população de afídeos. Os custos de produção e lucro líquido diferiram entre os tratamentos. Constatou-se que o tratamento de sementes com inseticida é suficiente para reduzir a epidemia do nanismo-amarelo em anos com baixa pressão populacional de afídeos; porém, em anos com maiores populações, a aplicação de inseticida à parte aérea também se torna necessária.Termos para indexação: Hordeum vulgare, Metopolophium dirhodum, Rhopalosiphum padi, tratamento de sementes, nanismo amarelo.

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Section: Resultssupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Protective effect and economic impact of insecticide application methods on barley

Stoetzer

Kawakami

Júnior

et al. 2014

Pesq. agropec. bras.

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“…Rhopalosiphum padi is relatively stable in abundance over the year, indicating a good adaptation of this species to the conditions of South Brazil (Lau et al 2009). Rhopalosiphum padi is also the most efficient B/CYDVs vector in south Brazil and BYDV-PAV is the predominant virus in winter cereals in that region (Parizoto et al 2013). Yield losses caused by BYDV in Brazilian commercial cultivars ranged from 40 to 50% when wheat was infected in early developmental stages (Lau et al 2015).…”

Section: Introductionmentioning

confidence: 99%

DIMBOA levels in hexaploid Brazilian wheat are not associated with antibiosis against the cereal aphids Rhopalosiphum padi and Sitobion avenae

Pereira

Sarria

Powers

et al. 2017

Theor. Exp. Plant Physiol.

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UK variety used as reference. Bioassays were conducted to evaluate the development and fecundity of both aphids when grown on the wheat genotypes. Although BRS Guabiju and BRS Timbau´va were among the genotypes showing the highest susceptibility and resistance, respectively, against both aphid species, no correlation could be found between DIMBOA levels and antibiosis effects. The cultivar BRS 327 was among the genotypes showing lower intrinsic rate of population increase for the two aphid species. Elucidating the role of secondary metabolites in plant resistance to aphids and the characterization of the genotypes that allowed reduced development of R. padi and S. avenae are important steps to achieve a better natural resistance in hexaploid Brazilian wheat.

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“…They cause direct damage to crops by inserting their stylet on plant cells and tissues, triggering reactions and cell death by the toxins and enzymes in their saliva, and by sucking plant sap. Indirect damages result from the transmission of Barley/Cereal yellow dwarf virus (B/CYDVs) the causal agents of yellow dwarf disease (YDD), a frequent disease in wheat and oat fields in southern Brazil (Parizoto et al, 2013). YDD -like symptoms have been reported in the country since 1929 andCaetano (1968) first described its etiology.…”

Section: Introductionmentioning

confidence: 99%

Temporal Changes in Cereal Aphids (Hemiptera: Aphididae) Populations in Northern Rio Grande do Sul, Brazil

Rebonatto¹,

Salvadori²,

Lau³

2015

JAS

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Cereal aphids (Hemiptera: Aphididae) are economically important pests in all wheat-producing regions of Brazil and about eight species can be found in wheat crops. Aphids acquired the condition of severe pest in wheat in the 1970s, due to the emergence of Metopolophium dirhodum and Sitobion avenae. A successful biological control program of wheat aphids was introduced in southern Brazil in 1978. This study describes temporal changes in aphid populations in a wheat producing area in the northern region of Rio Grande do Sul (RS) state, Brazil. Data from weekly samples (water traps of Moericke type) for the current (May to November 2008November , 2009November and 2010 population frequency of each species was compared with 1970s populations. In addition, their seasonal fluctuations and the influence of rainfall and temperature on their populations were estimated. The species collected, and their frequencies, were as follows: Rhopalosiphum padi (57.6%), Sitobion avenae (31.0 %), Schizaphis graminum (7.7%), Metopolophium dirhodum (1.4%), Rhopalosiphum rufiabdominalis (0.9%), Rhopalosiphum maidis (0.6%), Sipha maydis (0.4%) and Sipha flava (0.4%). Aphids populations in winter cereals in northern RS have changed radically. The high populations of M. dirhodum in wheat in 1970s have been reduced to such levels that rarely have been found. Nowadays, R. padi was the predominant species. When the rainfall remained between 0-20 mm and temperatures between 15-20 ºC, aphid populations were more numerous than the average for the sampling period.

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Barley yellow dwarf virus-PAV in Brazil: seasonal fluctuation and biological characteristics

Cited by 36 publications

References 8 publications

Protective effect and economic impact of insecticide application methods on barley

Protective effect and economic impact of insecticide application methods on barley

DIMBOA levels in hexaploid Brazilian wheat are not associated with antibiosis against the cereal aphids Rhopalosiphum padi and Sitobion avenae

Temporal Changes in Cereal Aphids (Hemiptera: Aphididae) Populations in Northern Rio Grande do Sul, Brazil

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