Efeito da época de inoculação do vírus do mosaico das nervuras por Aphis gossypii Glover (Hemiptera: Aphididae) no desenvolvimento e na produção do algodoeiro

Michelotto, Marcos Doniseti; Busoli, Antônio Carlos

doi:10.1590/s1519-566x2006000200015

Cited by 8 publications

(5 citation statements)

References 10 publications

(9 reference statements)

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“…Os prejuízos provocados por esse vírus dependem do período de desenvolvimento da planta em que ocorre a infecção (Michelotto & Busoli, 2006). Quando ocorre até os 50 dias depois da emergência, pode resultar em perda total de produção em cultivares suscetíveis.…”

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Transmissibilidade e reação de genótipos de algodoeiro a uma forma atípica do vírus do mosaico das nervuras

Galbieri¹,

Cia²,

Fuzatto³

et al. 2010

Trop. plant pathol.

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Transmissibilidade e reação de genótipos de algodoeiro a uma forma atípica do vírus do mosaico das nervuras

Galbieri¹,

Cia²,

Fuzatto³

et al. 2010

Trop. plant pathol.

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“…These values are significant, and should be considered in crop management programs. However, according to the data reported earlier by Freire (1998), Santos et al (2004) and Michelotto and Busoli (2006), CBD in susceptible cultivars seems to be more destructive than ACBD. This has also been highlighted by Galbieri et al (2010) and Santos (2015).…”

Section: Discussionmentioning

confidence: 52%

“…For cotton blue disease, infection is most harmful up to 50 days after sowing, as shown by Santos et al (2004), Santos (2015), and Michelotto and Busoli (2006). There was a high incidence of disease in cultivar FM 975WS, a fact observed in areas under cultivation in MT.…”

Section: Discussionmentioning

confidence: 96%

Cotton blue disease in central-west Brazil: Occurrence, vector (Aphis gossypii) control levels and cultivar reaction

Galbieri

Boldt²,

Scoz³

et al. 2017

Trop. plant pathol.

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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.

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“…A. gossypii transmits CLRDV to cotton plants in a circulative and nonpropagative manner (Michelotto & Busoli, 2003). Both winged and wingless morphs can transmit the virus after a 48‐h inoculation access period for up to 12 days (Michelotto & Busoli, 2006, 2009).…”

Section: Insect Vector and Transmissionmentioning

confidence: 99%

Cotton leafroll dwarf disease: An enigmatic viral disease in cotton

Edula

Bag

Milner

et al. 2023

Molecular Plant Pathology

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Taxonomy: Cotton leafroll dwarf virus (CLRDV) is a member of the genus Polerovirus, family Solemoviridae. Geographical Distribution: CLRDV is present in most cotton‐producing regions worldwide, prominently in North and South America. Physical Properties: The virion is a nonenveloped icosahedron with T = 3 icosahedral lattice symmetry that has a diameter of 26–34 nm and comprises 180 molecules of the capsid protein. The CsCl buoyant density of the virion is 1.39–1.42 g/cm3 and S20w is 115–127S. Genome: CLRDV shares genomic features with other poleroviruses; its genome consists of monopartite, single‐stranded, positive‐sense RNA, is approximately 5.7–5.8 kb in length, and is composed of seven open reading frames (ORFs) with an intergenic region between ORF2 and ORF3a. Transmission: CLRDV is transmitted efficiently by the cotton aphid (Aphis gossypii Glover) in a circulative and nonpropagative manner. Host: CLRDV has a limited host range. Cotton is the primary host, and it has also been detected in different weeds in and around commercial cotton fields in Georgia, USA. Symptoms: Cotton plants infected early in the growth stage exhibit reddening or bronzing of foliage, maroon stems and petioles, and drooping. Plants infected in later growth stages exhibit intense green foliage with leaf rugosity, moderate to severe stunting, shortened internodes, and increased boll shedding/abortion, resulting in poor boll retention. These symptoms are variable and are probably influenced by the time of infection, plant growth stage, varieties, soil health, and geographical location. CLRDV is also often detected in symptomless plants. Control: Vector management with the application of chemical insecticides is ineffective. Some host plant varieties grown in South America are resistant, but all varieties grown in the United States are susceptible. Integrated disease management strategies, including weed management and removal of volunteer stalks, could reduce the abundance of virus inoculum in the field.

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Efeito da época de inoculação do vírus do mosaico das nervuras por Aphis gossypii Glover (Hemiptera: Aphididae) no desenvolvimento e na produção do algodoeiro

Abstract: Neotropical Entomology 35(2): 251-256 (2006) Effect of the Time

Cited by 8 publications

References 10 publications

Transmissibilidade e reação de genótipos de algodoeiro a uma forma atípica do vírus do mosaico das nervuras

Transmissibilidade e reação de genótipos de algodoeiro a uma forma atípica do vírus do mosaico das nervuras

Cotton blue disease in central-west Brazil: Occurrence, vector (Aphis gossypii) control levels and cultivar reaction

Cotton leafroll dwarf disease: An enigmatic viral disease in cotton

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