Validation of a sampling method: using one square centimeter for sampling the immature stages of Bemisia tabaci in soybean

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dc.creatorWeber, Igor Daniel
dc.creatorCzepak, Cecilia
dc.creatorGodinho, Karina Cordeiro Albernaz
dc.creatorBorges, Kevyllen Moreira Barbosa
dc.creatorCoelho, Alexandre Siqueira Guedes
dc.date.accessioned2025-03-06T19:16:22Z
dc.date.available2025-03-06T19:16:22Z
dc.date.issued2022-06
dc.description.abstractRecently, a sampling method was proposed to estimate the population of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in soybean, Glycine max (L.) Merr. (Fabaceae), by counting its immature stages on 1 cm² leaf surface as a sampling unit to reduce the effort required. However, no study has verified whether this sampling unit could accurately estimate the immature stages similar to counting individuals in the total area of a soybean leaflet. Thus, we studied the correlation between the counts performed in 1 cm² and those in the total area of a leaflet to validate the ‘squared centimeter’ method as a sampling unit for immature stages of the whitefly. The research was carried out in two commercial soybean crops during the 2018/2019 harvest in Brazil. Each sampling was conducted by four individuals at 12 random collection points in the field. A plant was divided into three parts: apical, middle, and lower thirds, where a trifoliate leaf was removed from each of these plant thirds. For the evaluation, the trifoliate leaf was divided into left, central, and right leaflets. The immature whitefly population on its abaxial face was evaluated using two methods: counting in 1 cm² and counting in the total area of the leaflet. The four stages of immature B. tabaci quantified and identified were egg, crawler, nymphal stage 1–4 (N1–N4), and pseudo-pupa. Significant positive correlations were detected between the mean counts in 1 cm² and in the total area of the soybean leaflet for the four whitefly stages. However, the correlation was weak for the crawler stage. Therefore, this study elucidates that 1 cm2 as sampling unit is suitable for estimating the population densities of eggs, N1–N4, and pseudo-pupa stages of B. tabaci in soybean plants.
dc.identifier.citationWEBER, Igor Daniel et al. Validation of a sampling method: using one square centimeter for sampling the immature stages of Bemisia tabaci in soybean. Entomologia Experimentalis et Applicata, [s. l.], v. 170, n. 6, p. 488-494, 2022. DOI: 10.1111/eea.13167. Disponível em: https://onlinelibrary.wiley.com/doi/10.1111/eea.13167. Acesso em: 12 fev. 2025.
dc.identifier.doi10.1111/eea.13167
dc.identifier.issn0013-8703
dc.identifier.issne- 1570-7458
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/10.1111/eea.13167
dc.language.isoeng
dc.publisher.countryGra-bretanha
dc.publisher.departmentEscola de Agronomia - EA (RMG)
dc.rightsAcesso Restrito
dc.subjectAleyrodidae
dc.subjectFabaceae
dc.subjectGlycine max
dc.subjectHemiptera
dc.subjectIntegrated pest management
dc.subjectIPM
dc.subjectMonitoring
dc.subjectSampling method
dc.subjectSampling unit
dc.subjectSilverleaf whitefly
dc.subjectSoybean
dc.subjectSweet potato whitefly
dc.titleValidation of a sampling method: using one square centimeter for sampling the immature stages of Bemisia tabaci in soybean
dc.typeArtigo

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