Dinâmica temporal da população do ácaro Brevipalpus phoenicis e da leprose dos citros sob condições naturais de epidemia

Czermainski, A. B. C.; Bassanezi, R. B.; Laranjeira, F. F.; Amorim, Lílian

doi:10.1590/s0100-41582007000400003

Cited by 11 publications

(9 citation statements)

References 7 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Moreover, our results have also confirmed high dependence among symptomatic plants, corroborating the findings of other authors . Plants with high scores for leprosis severity were always surrounded by low‐scored trees.…”

Section: Discussionsupporting

confidence: 92%

“…Even though some studies have found that leprosis dissemination is more effective within the planting row than between rows, we noticed a spreading trend in both directions equally, mainly in area 1, which is an older orchard with canopies intersecting each other. These differences might have been induced by the chemical applications, which may have affected the natural disease distribution.…”

Section: Discussioncontrasting

confidence: 79%

“…An efficient and economically viable management plan can be established by knowing the spatial and temporal distribution of a disease . However, the lack of a correlation between disease incidence and the presence of mites in plants is one of the challenges for the citrus leprosis pathosystem . Therefore, a few studies have suggested that the decision to control mites should consider not only its presence, but also the disease occurrence …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Space–time variability of citrus leprosis as strategic planning for crop management

Andrade

Lorençon

Siqueira

et al. 2018

Pest Management Science

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussioncontrasting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Space–time variability of citrus leprosis as strategic planning for crop management

Andrade

Lorençon

Siqueira

et al. 2018

Pest Management Science

View full text Add to dashboard Cite

show abstract

“…Como observado em citros (Czermainski et al, 2007), foi detectada a presença de B. phoenicis em todos os órgãos das plantas (folhas, ramos e frutos). Na Área 1, verificou-se maior número de ácaros nas folhas (48,4%), em comparação aos ramos (30,4%) e aos frutos (21,2%) (Tabela 2).…”

Section: Resultsunclassified

Análise temporal e controle da mancha-anular e do ácaro vetor do Coffee ringspot virus

Almeida

Mori

Pozza

et al. 2012

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi avaliar a flutuação populacional do ácaro Brevipalpus phoenicis, vetor do Coffee ringspot virus (CoRSV) -agente causal da mancha-anular do cafeeiro -, bem como a sua distribuição em plantas de café e o efeito de acaricidas no seu controle em lavouras cafeeiras. O experimento foi realizado no Município de Coromandel, na região do Alto do Paranaíba, MG, durante dois anos. No segundo ano, avaliou-se o progresso da doença, e determinou-se a relação entre o crescimento populacional do ácaro e a incidência da doença. Observou-se que a mancha-anular e o ácaro ocorreram durante todo o ano, com maiores populações e incidência da doença nos meses com menores índices pluviais e temperaturas amenas. As análises de Pearson mostraram correlação negativa entre os parâmetros climáticos e a população do ácaro. Na análise da incidência da doença em diferentes épocas, verificou-se correlação positiva entre a primeira avaliação e as avaliações subsequentes. Quanto à distribuição espacial, foi observada a presença do ácaro em toda a planta; porém, as folhas são preferidas pelos adultos, enquanto os frutos são preferidos para oviposição. Os acaricidas são eficientes para manter a população do ácaro em baixos níveis, com consequente diminuição da incidência da doença.Termos para indexação: Brevipalpus phoenicis, acaricidas, análise de correlação, vetor. Temporal analysis and control of the ringspot disease and mite vector of Coffee ringspot virusAbstract -The objective of this work was to evaluate the population fluctuation of the mite Brevipalpus phoenicis, vector of the Coffee ringspot virus (CoRSV) -the causal agent of the coffee ringspot disease -, as well as its distribution in coffee plants, and the effect of acaricides in its control in coffee crops. The experiment was carried out at the municipality of Coromandel, in the region of Alto do Paranaíba, MG, Brazil, during two years. In the second year, the progress of the disease was evaluated, and the relationship between the mite population and disease incidence was determined. Ringspot disease and mites were detected throughout the year, with larger populations and disease incidence in the months with lower rainfall and mild temperatures. Pearson analyses showed negative correlation between the climatic parameters and the mite population. In the analysis of the disease incidence in different periods, a positive correlation was found among the first and subsequent evaluations. Regarding spatial distribution, mite presence was observed in the whole plant; however, leaves are preferred by the adults, whereas the fruit are preferred for oviposition. The acaricides are effective in keeping the mite population at low levels, with consequent reduction of disease incidence.

show abstract

“…Leprosis incidence increases significantly from one cycle to the next, which is a typical feature of polyetic diseases; however, it is not associated with previous records of the mite populations (Czermainski et al ., ). In a previous study undertaken in several commercial groves with mite control, Bassanezi & Laranjeira () observed that spatial patterns of leprosis symptoms and mite‐infested trees were different, i.e.…”

Section: Introductionmentioning

confidence: 99%

Spatial patterns of the Citrus leprosis virus and its associated mite vector in systems without intervention

et al. 2018

View full text Add to dashboard Cite

Leprosis is caused by the Citrus leprosis virus cytoplasmic type and is vectored by the mite Brevipalpus yothersi. Miticide applications, which cost $54 million annually, are based on inspection for the presence of mites. The aim of the present study was to characterize the spatial patterns of B. yothersi‐infested trees and trees with leprosis symptoms for further improvement in sampling and disease control. The presence of mites and the occurrence of leprosis were assessed over two years in 1160 Valencia trees and 720 Natal trees in a commercial sweet orange grove in Sao Paulo State, Brazil. To assess the natural growth and dispersal of mites and leprosis, mite populations were not controlled during the experimental period. Maps of mite‐infested trees and trees with leprosis symptoms were analysed at three different levels of spatial hierarchy using complementary methods, i.e. among adjacent trees within and across rows, within quadrats, and the strength and orientation of aggregation among quadrats. The study showed that the spatial patterns of virus‐infected and mite‐infested trees were different, with a strong aggregation pattern of trees with leprosis symptoms that increased over time. Conversely, the spatial pattern of B. yothersi showed randomness or weak aggregation at all three spatial hierarchical levels. Disease incidence increased steadily in plots of both cultivars, unlike in mite‐infested trees where incidence fluctuated over time. These results have important implications for the development of better management strategies for leprosis. Sampling methods and action thresholds for mite control should consider primary disease inoculum in addition to the incidence of mites.

show abstract

Dinâmica temporal da população do ácaro Brevipalpus phoenicis e da leprose dos citros sob condições naturais de epidemia

Cited by 11 publications

References 7 publications

Space–time variability of citrus leprosis as strategic planning for crop management

Space–time variability of citrus leprosis as strategic planning for crop management

Análise temporal e controle da mancha-anular e do ácaro vetor do Coffee ringspot virus

Spatial patterns of the Citrus leprosis virus and its associated mite vector in systems without intervention

Contact Info

Product

Resources

About