Aspectos técnicos e econômicos da poda e do controle químico de Brevipalpus phoenicis no manejo da leprose dos citros

Andrade, Daniel Júnior de; Pattaro, Fernando César; Morais, Marcos de Oliveira; Barbosa, Crislany de Lima; Oliveira, Claudio

doi:10.1590/s0100-29452013000200010

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…O sucesso desta prática, ou seja, do controle biológico de pragas em cultivos comerciais é relatada por várias pesquisas (OLIVEIRA et al, 2006), como no manejo de ácaros (FADINI, 2006) e mosca das frutas (ALVARENGA, 2006) utilizando-se de inimigos naturais. O controle biológico de pragas e doenças, segundo Picanço (2002), compreende a integração de métodos de controle utilizadores de estratégias que buscam eliminar ou reduzir o inóculo (ANDRADE et al, 2013) ou população inicial no campo e a redução da taxa de progresso da praga, como por exemplo, podas de limpeza, nutrição equilibrada, monitoramento com iscas e armadilhas, buscando avaliar ao nível e dano econômico, visando como último recurso o uso de agrotóxicos (ZAMBOLIM, 2000). Zambolim, (2000) relata as medidas de controle de 37 doenças causadas por fungos e bactérias, 9 causadas por vírus e 7 tendo como agente causal os nematoides.…”

Section: Citricultores De Jerônimo Monteiro E Alegreunclassified

Percepção dos citricultores e técnicos agrícolas quanto ao uso dos agrotóxicos

et al. 2015

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A citricultura tem se destacado como alternativa de renda aos agricultores familiares no estado do Espírito Santo, numa proposta de diversificação econômica com a cultura do café. Objetivou-se neste trabalho verificar o nível de conhecimento e comprometimento técnico a respeito da responsabilidade da emissão de Receitas Agronômicas por técnicos em agropecuária, egressos do IFES-campus de Alegre, bem como analisar a percepção dos citricultores quanto ao uso racional de agrotóxicos. Para chegar aos resultados, um questionário foi estruturado e aplicado a uma parcela representativa de citricultores dos municípios de Alegre e de Jerônimo Monteiro, e uma oficina pedagógica, com o tema "Receituário Agronômico e a Citricultura", foi realizada com os técnicos em agropecuária. Percebeu-se, por parte dos citricultores de Jerônimo Monteiro e de Alegre, o uso irracional de produtos agrotóxicos no manejo fitossanitário das suas atividades econômicas. Notou-se que os técnicos não apresentaram segurança quanto ao tema discutido na oficina, demonstrando pouco conhecimento a respeito dos problemas fitossanitários dos citros. Há a necessidade de ações educativas no sentido de proporcionar aos citricultores e aos técnicos, o conhecimento adequado para adoção do Manejo Integrado de Pragas e dos métodos alternativos de manejo, sensibilizando-os quanto ao uso racional de agrotóxicos.Perception of growers and agricultural experts in the use of pesticidesAbstract: The citriculture has emerged as an alternative income to farmers in the state of Espírito Santo, a proposal for economic diversification with coffee growing. In this scenario aimed at verifying the level of commitment and technical knowledge about the responsibility of issuing Agronomic Recipes by technicians in agriculture, egresses of IFES-campus Alegre, and analyze the perception of citrus growers Alegre-ES and Jerônimo Monteiro-ES about the rational use of agrochemicals. To get the expected results , a questionnaire was structured and applied to a significant portion of citrus growers in the municipalities of Alegre and Jeronimo Monteiro and conducting a workshop with the theme " Recipes Agronomy and Citrus " with the help of technicians in agriculture graduates of IFES - campus Alegre of 2013. It was noticed that there, by the growers of Jeronimo Monteiro and Alegre, the irrational use of pesticides products in the phytosanitary management of their economic activities. We conclude that the technicians showed no certainty as to the subject discussed in the workshop, demonstrating little knowledge about the disease problems of citrus and its management, thus, the need for educational activities is necessary to provide growers the adequate knowledge to adoption of Integrated Pest Management and of alternative management methods, about the rational use of pesticides.

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Section: Citricultores De Jerônimo Monteiro E Alegreunclassified

Percepção dos citricultores e técnicos agrícolas quanto ao uso dos agrotóxicos

et al. 2015

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“…In the management of citrus leprosis, several strategies are recommended to prevent the transmission and spread of the disease in orchards. Among these strategies is the use of healthy seedlings free of viruses and vector mites, the systematic management of the vector, the pruning of symptomatic branches, the use of living fences and windbreaks with plants that do not host mites and virus, and the control of mite and virus-host weeds (Bastianel et al, 2010;Andrade et al, 2013a;Miranda et al, 2017). However, due to the potential damage caused by the virus transmitted by this mite, the use of synthetic acaricides is the main management strategy used by citrus growers to reduce vector population and, consequently, the spread of the disease in orchards (Andrade et al, 2010b;Carvalho et al, 2014;Della Vechia et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

The importance of acaricides in the control of citrus leprosis mite and factors that interfere with the efficacy

Vechia¹,

Kapp²,

Rocha³

2022

Citrus Res. Technol.

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Citrus leprosis mite is an important pest to Brazilian citriculture. Due to the potential damage caused by the virus transmitted by this mite, synthetic acaricides are the main management strategy used by citrus growers to reduce the vector population. The current review aims to provide historical data on the use of acaricides to control the citrus leprosis mite and the main factors involved with the efficacy of these products. To get to know the main products that were and have been used to control the leprosis mite, we used scientific papers that studied the toxic effect caused by pesticides on these mites. From 1959 to nowadays, more than 200 papers have been published demonstrating acaricide efficacy on the leprosis mite. Although there are several acaricides registered to control the leprosis mite (abamectin, amitraz, acrinathrin, bifenthrin, fenpropathrin, etoxazole, hexythiazox, flufenoxuron, spirodiclofen, cyflumetofen, chlorfenapyr, fenbutatin oxide, propargite, fenpyroximate, pyridaben, and sulfur), their effectiveness will be determined by factors inherent to the products, application (quality of the spray water, plant coverage by sprayed acaricide, addition of adjuvants, and tank mixture), and biological factors of the pest (biotic potential, short life cycle, reproduction type, initial infestation level, reproduction type, and evolution of mite resistance). The use of synthetic acaricides is a control option that generates short-term results for the citrus grower. However, the association with other control measures will allow more satisfactory results for the pathosystem. Additionally, information on factors that interfere with the effectiveness of acaricides needs to be generated and made available to citrus growers.

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“…The disease is nonsystemic; therefore, the vector can only acquire the virus by feeding on leprosis lesions (Kitajima et al, 1972;Colariccio et al, 1995). Nevertheless, depending on disease incidence, the elimination of fruits and branches with symptoms can be a laborious and more expensive practice than the application of miticide sprays (Andrade et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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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.

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Aspectos técnicos e econômicos da poda e do controle químico de Brevipalpus phoenicis no manejo da leprose dos citros

Cited by 5 publications

References 9 publications

Percepção dos citricultores e técnicos agrícolas quanto ao uso dos agrotóxicos

Percepção dos citricultores e técnicos agrícolas quanto ao uso dos agrotóxicos

The importance of acaricides in the control of citrus leprosis mite and factors that interfere with the efficacy

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

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