Data/hora: 22/06/2024 02:10:16

Biblioteca(s): | Embrapa Algodão.
Data corrente: | 19/12/2017
Data da última atualização: | 05/01/2018
Autoria: | GALBIERI, R.; BOLDT, A. S.; SCOZ, L. B.; RODRIGUES, S. M. M.; RABEL, D. O.; BELOT, J. L.; VASLIN, M.; SILVA, T. da F.; KOBAYASTI, L.; CHITARRA, L. G.
Afiliação: | RAFAEL GALBIERI, INSTITUTO MATO-GROSSENSE DO ALGODÃO; UFMT; ALBERTO S. BOLDT, INSTITUTO MATO-GROSSENSE DO ALGODÃO; LEONARDO B. SCOZ, INSTITUTO MATO-GROSSENSE DO ALGODÃO; SANDRA MARIA MORAIS RODRIGUES, CNPA - NÚCLEO DE P&D DO CERRADO, SINOP; DIEGO O. RABEL, UFPA; JEAN L. BELOT, INSTITUTO MATO-GROSSENSE DO ALGODÃO; MAITE VASLIN, UFRJ; TATIANE da FRANCA SILVA, UFRJ - USP; LEIMI KOBAYASTI, UFMT; LUIZ GONZAGA CHITARRA, CNPA.
Título: | Cotton blue disease in central-west Brazil: Occurrence, vector (Aphis gossypii) control levels and cultivar reaction.
Ano de publicação: | 2017
Fonte/Imprenta: | Tropical Plant Pathology, 2017
DOI: | 10.1007/s40858-017-0165-1
Idioma: | Inglês
Notas: | Publicado online em 16 de junho de 2017.
Conteúdo: | Cotton blue disease (CBD) is the viral disease which poses the greatest threat to cotton in Brazil. One efficient way of controlling this disease is by using resistant cultivars. However, the recent emergence of an atypical form of CBD (ACBD), caused by a new virus genotype capable of overcoming these resistant cultivars, is causing concern. Thus, the aims of this study were to evaluate the distribution of ACBD in the states of Mato Grosso (MT) and Goiás (GO), to determine the relationship between vector infestation level, disease incidence and yield, and to check the reaction of cotton cultivars to two viral isolates. In both cotton production areas, 1128 plots were surveyed and 6.5% showed plants with the virus, 97.3% and 2.7% with ACBD and CBD, respectively. In cultivars susceptible to ACBD, a positive linear relationship between changes in the levels of aphid infestation and incidence of viral infection was indentified, and a negative linear relationship between infestation level and yield. The maximum acceptable level of aphids up to 80 days after sowing for susceptible cultivars was approximately 15%. Although 83% of the cultivars were shown to be resistant to CBD, only 19.2% were resistant to ACBD. There was also a number of cultivars with considerable resistance to both isolates.
Palavras-Chave: | Disease; Genotypes.
Thesagro: | Algodão; Doença; Genótipo; Virus.
Thesaurus Nal: | Cotton.
Categoria do assunto: | --
Registro original: | Embrapa Algodão (CNPA)
Exemplares: | CNPA - (28424-1) - UPC - AP - DD -  -  -  - DIS