Progênies de seringueira com potencial para conferir resistência a ácaros (Calacarus heveae Feres e Tenuipalpus heveae Baker)

Vieira, Marineide Rosa; Silva, Helder Adriano de Souza da; Cardoso, Maria Monteverde; Figueira, Janayna Correa

doi:10.1590/s0103-84782009005000164

Cited by 11 publications

(10 citation statements)

References 5 publications

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“…Several studies have revealed numerous factors that produce natural resistance against herbivores in different cultivars of plants (e.g., Vieira et al 2009;Reinert et al 2008;Boina et al 2005;Hennessey et al 1995;Erb et al 1994). Growing resistant cultivars on a commercial scale has been regarded as a successful and low-cost measure for controlling pests.…”

Section: Introductionmentioning

confidence: 99%

Seasonal suitability of three rubber tree clones to Calacarus heveae (Acari, Eriophyidae)

2011

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The suitability of rubber tree clones to Calacarus heveae was inferred from the life cycle, reproduction and survivorship of this mite. The assays were performed under controlled conditions with leaflets detached from 6-year-old plants. The development of 20 C. heveae individuals on each of the clones GT 1, PB 235 and RRIM 600 was analysed. This experiment was performed four times during periods when C. heveae was abundant in the field: (P1) November-December 2005, (P2) January-February, (P3) March-April and (P4) May-June 2006. Accordingly, the leaflets used in each assay represented the physiological condition of the host plant during each period. This approach allowed us to evaluate the seasonal suitability of rubber tree clones to C. heveae. We observed seasonal differences in the suitability of rubber tree clones to mite attack. The mites reared on the PB235 had a shorter development period, the highest egg production and highest survivorship. This evidence showed that the PB 235 was the most suitable of those tested. We also observed that the leaflets used in the assays during periods P2 and P3 were the most favourable for the development of C. heveae. This finding emphasises the seasonal suitability of rubber tree leaflets. On the other hand, GT 1 showed higher resistance against C. heveae than did RRIM 600 and PB 235, primarily during the period from November to February. This result indicated that use of the GT 1 clone to control the mite might represent an alternative for growers.

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Section: Introductionmentioning

confidence: 99%

Seasonal suitability of three rubber tree clones to Calacarus heveae (Acari, Eriophyidae)

2011

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“…A avaliação de genótipos quanto à infestação de C. heveae e T. heveae tem sido feita com base no número médio de ácaros registrado em todo o período de produção da cultura, do enfolhamento à senescência (Silva et al, 2011;Vieira et al 2009). Uma vez que o período de maior ocorrência das espécies pode ir de fevereiro a junho (Hernandes e Feres, 2006a;Vieira e Gomes, 1999;Vieira et al, 2006;Vis et al, 2006), o número de ácaros poderia não refletir corretamente o nível de infestação, caso as maiores populações tivessem ocorrido em período anterior ao avaliado (no presente trabalho, duas avaliações no período de abril a junho).…”

Section: Resultsunclassified

“…(1) Médias originais; para análise estatística, os dados foram transformados em log (x+2); (Vieira et al, 2009). Para C. heveae, a maior população registrada em 2007 era esperada, uma vez que esse ácaro é favorecido por ambiente úmido, conforme os dados de Ferla e Moraes (2003), os quais verificaram, em estudos de laboratório, a viabilidade da fase de ovo a adulto acima de 90%, com umidade relativa do ar de 90±5%.…”

Section: Resultsunclassified

Resistência de clones de seringueira à infestação por ácaros

2013

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ResumoCalacarus heveae Feres (Eriophyidae) e Tenuipalpus heveae Baker (Tenuipalpidae) podem causar intenso desfolhamento em plantas de seringueira. Na perspectiva de implantação de manejo integrado de pragas, o uso de clones resistentes pode vir a ser uma importante estratégia de controle. O objetivo deste trabalho foi avaliar a resistência de clones de seringueira ao ataque desses ácaros em experimento conduzido em Votuporanga, SP. O delineamento experimental foi o de blocos casualizados com 18 tratamentos e três repetições, sendo que os tratamentos adotados foram: clones PB 230, PB 243, PB 252, PB 294, PB 306, PB 311, PB 312, PB 314, PB 324, PB 346, PB 350, PB 355, IAC 56, IAC 302, IAC 328, IAC 334, Fx 3899 e RRIM 600. As avaliações populacionais de C. heveae e T. heveae foram realizadas pela contagem em laboratório dos ácaros e exúvias presentes em seis folíolos por parcela. Os níveis de desfolhamento foram avaliados com uma escala de notas de 0 a 4, sendo 0 ausência de desfolhamento e 4 desfolhamento acima de 75%. Com base nos resultados pode-se concluir que o clone Fx 3899 é resistente a C. heveae por não preferência e/ou antibiose. O clone IAC 56 é menos suscetível ao desfolhamento provocado pela infestação de C. heveae e T. heveae. Palavras-chave: Hevea brasiliensis, Calacarus heveae, Tenuipalpus heveae, Acari. Resistance of rubber tree clones to mite infestation AbstractCalacarus heveae Feres (Eriophyidae) and Tenuipalpus heveae Baker (Tenuipalpidae) can cause heavy defoliation of rubber tree plants. From the perspective of integrated pest management, resistant clones can be an important strategy. The objective of this work was to evaluate the resistance of rubber tree clones to the attack of mites, in an experiment carried out in Votuporanga, SP. The experimental design was a randomized blocks with eighteen treatments and three replications. The treatments were the clones PB 230, PB 243, PB 252, PB 294, PB 306, PB 311, PB 312, PB 314, PB 324, PB 346, PB 350, PB 355, IAC 56, IAC 302, IAC 328, IAC 334, Fx 3899 and RRIM 600. The evaluation of C. heveae and T. heveae populations was performed by counting mites and exuviae presence in six leaflets per plot. The defoliation levels were evaluated with a score scale, varying from 0 (no defoliation) to 4 (above 75% of defoliation). Based on the results, Fx 3899 clone is resistant through non-preference and/or antibiosis to C. heveae. The IAC 56 clone is less susceptible to defoliation caused by C. heveae and T. heveae infestation.

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“…Uma vez que T. heveae coloniza a página inferior dos folíolos, ao longo das nervuras, a contagem dos indivíduos foi realizada na superfície abaxial, em duas áreas de 1 cm 2 , sendo uma sobre a nervura principal e outra sobre uma nervura lateral, de acordo com Vieira et al (2009).…”

Section: Methodsunclassified

Distribuição espacial de Tenuipalpus heveae Baker (Acari: Tenuipalpidae) na cultura da seringueira

Martins¹,

Vieira²,

Barbosa³

et al. 2010

Neotrop. entomol.

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-The objective of this work was to study the spatial distribution of Tenuipalpus heveae Baker in rubber tree plantations. The experimental area was located in Marinópolis, State of São Paulo, and corresponded to a total of 1,000 plants (clone RRIM 600) divided in 100 plots of ten plants each. A total of 16 samplings were conducted, approximately once every 10 days, between December 2007 and June 2008. On each date, samples were taken from two plants per plot, each sample corresponding to the top 30 cm of a branch randomly taken from the median region of the canopy of each plant. The number of T. heveae was evaluated on three leaflets randomly taken from each sample, using a 20x power pocket magnifying glass. The number of mites was evaluated in two areas of 1 cm 2 delimited on the lower surface of each leaflet, being one along the midrib and the other along a lateral vein. The calculated dispersion indexes were: variance/mean relationship (I), index of Morisita (Iδ), coefficient of Green (Cx) and k exponent of negative binomial distribution. Tenuipalpus heveae showed aggregate distribution. The negative binomial distribution model was the most appropriate to represent the spatial distribution of the mite in the rubber tree plantation.

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Progênies de seringueira com potencial para conferir resistência a ácaros (Calacarus heveae Feres e Tenuipalpus heveae Baker)

Abstract: IIProgênies de seringueira com potencial para conferir resistência a ácaros (Calacarus heveae Feres e Tenuipalpus heveae Baker)Rubber tree progenies with potential to confer resistance to the mite (Calacarus periods, 2002/ 2003, 2003/2004 and 2004/2005

Cited by 11 publications

References 5 publications

Seasonal suitability of three rubber tree clones to Calacarus heveae (Acari, Eriophyidae)

Seasonal suitability of three rubber tree clones to Calacarus heveae (Acari, Eriophyidae)

Resistência de clones de seringueira à infestação por ácaros

Distribuição espacial de Tenuipalpus heveae Baker (Acari: Tenuipalpidae) na cultura da seringueira

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