Neotropical Entomology (2006) 35, 93-100

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Wilson I. Maruyama, José C. Barbosa and Luciana C. Toscano (2006)
Distribuição espacial de Oncometopia facialis (Signoret) (Hemiptera: Cicadellidae) em pomar cítrico
[Spatial distribution of Oncometopia facialis (Signoret) (Hemiptera: Cicadellidae) in citrus orchard]
Neotropical Entomology 35 (1), 93-100
Abstract: The spatial distribution of Oncometopia facialis (Signoret) was studied in sweet orange to elaborate sampling plans and decision-making procedure for the control of this sharpshooter in the field. The samplings were carried out fortnightly in a grid design disposition of 100 points (plants) in citrus orchard, with yellow sticky traps. The average number of O. facialis ranged from 0.35 to 1.17 insects/trap, with the I index varying from 0.89 to 1.82. The fit tests to negative binomial, Poisson distribution, I index and Morisita index indicated aggregated distribution of this insect. The b result of Taylor's power law was 1.6382 (t = 2,71; d.f. = 11; P < 0.05). Sampling plans were elaborated with a precision level of 10, 20 and 25% of error in the mean estimation.

Estudou-se a distribuição espacial de Oncometopia facialis (Signoret) em citros, com a finalidade de elaborar planos de amostragens e tomada de decisão para o controle da cigarrinha em levantamentos no campo. As amostragens foram quinzenais, em uma grade de 100 pontos (plantas) em pomar de laranja doce, com armadilhas adesivas amarelas. O número médio de O. facialis variou de 0,35 a 1,17 insetos/armadilha, com a razão variância/média (índice I) entre 0,89 e 1,82. Os testes de ajuste à distribuição binomial negativa, de Poisson e afastamento da aleatoriedade para índice I e Morisita indicaram a distribuição agregada da espécie. O valor do expoente b da lei de potência de Taylor foi de 1,6382 (t = 2,71; g.l. = 11; P < 0,05). Foram elaborados planos de amostragem com níveis de precisão de 10, 20 e 25% de erro na estimativa da média.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
surveys/sampling/distribution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Oncometopia facialis Citrus (genus) Brazil (south)
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