Spatial and Temporal Analyses of Citrus Sudden Death in Brazil

Bassanezi, R. B.; Filho, Armando Bergamin; Amorim, Luciana de Assis; Gottwald, T. R.

doi:10.5070/c50zg6h8dg

Cited by 4 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Keissler] and huanglongbing (HLB) (Candidatus Liberibacter spp. ), which have compromised the orchards and hindered the management and production of the crop (3,4). Consequently, the area planted and production of mandarins in Brazil have declined in recent years (5).…”

Section: Introductionmentioning

confidence: 99%

Citrus Essential Oils as an Alternative Method of Control of the Fungus Alternaria alternata (Fr.: Fr.) Keissler

Azevedo¹,

Devite²,

Bastianel³

et al. 2023

Preprint

View full text Add to dashboard Cite

Alternaria brown spot (ABS) is a disease caused by the fungus Alternaria alternata f. sp. citri, which results in lesions on fruits, leaves, and branches of several mandarin varieties and their hybrids. Due to the high cost of fungicide application, alternative methods for controlling ABS need to be studied. Therefore, this study aimed to evaluate the use of essential oils (EOs) from different mandarin varieties to mitigate the effects of ABS. The inhibitory effect of different concentrations (1, 2, 4, 8, and 16 μL mL-1) of Fremont IAC 543 mandarin, IAC 2019Maria mandarin, Murcott IAC 221 tangor, and Late IAC 855 willowleaf. EOs on the in vitro mycelial growth of the fungus A. alternata was evaluated. Additionally, the curative and preventive effects of these EOs on ABS symptoms on detached leaves of Murcott IAC 221 tangor were also assessed. The EO of IAC 2019Maria mandarin induced less mycelial growth, and consequently, greater inhibition of the growth of the fungus A. alternata at a concentration of 16 μL mL-1. This EO was more effective in control than the other oils tested. In the detached leaf experiment, both the curative and preventive treatments at a concentration of 16 μL mL-1 showed lower values of disease severity.

show abstract

Section: Introductionmentioning

confidence: 99%

Citrus Essential Oils as an Alternative Method of Control of the Fungus Alternaria alternata (Fr.: Fr.) Keissler

Azevedo¹,

Devite²,

Bastianel³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Citrus Sudden Death Is Transmitted by Graft-Inoculation and Natural Transmission Is Prevented by Individual Insect-Proof Cages

et al. 2011

View full text Add to dashboard Cite

Citrus sudden death (CSD) transmission was studied by graft-inoculation and under natural conditions. Young sweet orange trees on Rangpur rootstock were used as indicator plants. They were examined regularly for one or two characteristic markers of CSD: (i) presence of a yellow-stained layer of thickened bark on the Rangpur rootstock, and (ii) infection with the CSD-associated marafivirus. Based on these two markers, transmission of CSD was obtained, not only when budwood for graft-inoculation was taken from symptomatic, sweet orange trees on Rangpur, but also when the budwood sources were asymptomatic sweet orange trees on Cleopatra mandarin, indicating that the latter trees are symptomless carriers of the CSD agent. For natural transmission, 80 young indicator plants were planted within a citrus plot severely affected by CSD. Individual insect-proof cages were built around 40 indicator plants, and the other 40 indicator plants remained uncaged. Only two of the 40 caged indicator plants were affected by CSD, whereas 17 uncaged indicator plants showed CSD symptoms and were infected with the marafivirus. An additional 12 uncaged indicator plants became severely affected with citrus variegated chlorosis and were removed. These results strongly suggest that under natural conditions, CSD is transmitted by an aerial vector, such as an insect, and that the cages protected the trees against infection by the vector.

show abstract

Effect of Citrus Sudden Death on Yield and Quality of Sweet Orange Cultivars in Brazil

et al. 2007

Self Cite

View full text Add to dashboard Cite

show abstract

Spatial and Temporal Analyses of Citrus Sudden Death in Brazil

Cited by 4 publications

References 15 publications

Citrus Essential Oils as an Alternative Method of Control of the Fungus Alternaria alternata (Fr.: Fr.) Keissler

Citrus Essential Oils as an Alternative Method of Control of the Fungus Alternaria alternata (Fr.: Fr.) Keissler

Citrus Sudden Death Is Transmitted by Graft-Inoculation and Natural Transmission Is Prevented by Individual Insect-Proof Cages

Effect of Citrus Sudden Death on Yield and Quality of Sweet Orange Cultivars in Brazil

Contact Info

Product

Resources

About