Spatial distribution of nymphs and adults of Euschistus heros (Fabricius, 1794) (Heteroptera: Pentatomidae) in transgenic soybean cultivars of different maturing cycles

Souza, Leandro Aparecido de; Barbosa, José Carlos; Aguirre-Gil, Oniel Jeremías; Viana, Daniela de Lima; Santos, Letícia Serpa dos; Busoli, Antônio Carlos

doi:10.5433/1679-0359.2018v39n3p905

Cited by 8 publications

(11 citation statements)

References 9 publications

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“…Perhaps, our results partially diverge from those obtained by Guimarães () due to methodological differences, because, whilst this author built graphics, in our research, different population indexes were used. In contrast, Souza et al () concluded that adult E. heros displayed an aggregated distribution for all the soybean transgenic cultivars studied, corroborating the current research.…”

Section: Resultssupporting

confidence: 90%

Spatial distribution and sampling plan of the phytophagous stink bug complex in different soybean production systems

Fernandes

Costa

Cavada

et al. 2018

J Applied Entomology

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Phytophagous stink bugs are major soybean pests, and knowledge of spatial distribution models of the pest in the crop is fundamental to establishing an appropriate sequential sampling plan, and thus, allowing the correct utilization of control strategies. This work aimed to study the spatial distribution of phytophagous stink bugs in soybean grown in different cropping systems and determine a sequential sampling plan. The experiment was conducted in Maracaju, MS, Brazil, during the agricultural year of 2012/2013. Soybean cultivars BRS 284 and SYN 1163 RR were placed in an experimental area comprising six fields (two soybean cultivars × three cropping systems). Sampling was performed weekly, using a beat cloth per plot and counting the number of stink bugs found, virtually throughout the soybean reproductive period. Concerning the statistical analyses, we used the dispersion indexes (variance‐to‐mean ratio, Morisita's index, exponent k of the negative binomial and Green's coefficient) and probabilistic methods of frequency adjustment (negative binomial and Poisson). Adult and nymph phytophagous stink bugs showed aggregate disposition in the field regardless of the cropping system, and their numbers were adjusted to the negative binomial probability distribution. There was no difference in the behaviour of adult and nymphs considering the tested cultivars. We elaborated a practical sequential sampling plan for phytophagous stink bug complexes, considering crops intended for the production of grains and seeds.

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Section: Resultssupporting

confidence: 90%

Spatial distribution and sampling plan of the phytophagous stink bug complex in different soybean production systems

Fernandes

Costa

Cavada

et al. 2018

J Applied Entomology

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“…This finding is characterized as a pure nugget effect (total absence of spatial dependence), probably due to the low infestation by adults and whitefly nymphs in each evaluation, making the in geostatistical analyses imperceptible (Reay-Jones et al, 2010;Pias et al, 2017). These results are a common finding in this type of study; other authors with experiments on the spatial distribution of Euschistus heros (Fabricius, 1798) (Hemiptera: Pentatomidae) in soybean have made similar observations (Pias et al, 2017;De Souza et al, 2018).…”

Section: Discussionsupporting

confidence: 68%

Population fluctuation and distribution of bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae) in soybean crops

Rodrigues¹,

Silva²,

Silva³

et al. 2022

Front. Agron.

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Studies on the spatiotemporal dynamics of crop pests enable the determination of their colonization pattern and dispersion in the landscape. Geostatistics is an efficient tool to determine the spatial distribution pattern of the pest in the crops and to visualize them in appropriate maps. Analysis of these maps across the crop developmental stages can be a helpful tool in precision agriculture programs. The aim of this study was to determine the spatiotemporal distribution of Bemisia tabaci whitefly adults and nymphs in commercial soybean crops from planting to harvest. Infestation by the whitefly adults and nymphs started between 30 and 50 days after plant emergence. The maximum population density of ten adults per plant and two nymphs per leaf occurred between 90 and 101 days after plant emergence. In Kriging maps, it was possible to observe the distribution pattern for both adults and nymphs. The colonization of soybean plants by B. tabaci may be divided into three stages: beginning infestation (at the outermost parts of the crop), whole area colonization, and dispersion colonization (when the whole crop area is infested). The density of adult insects was positively correlated with rainfall and relative humidity. Wind speed positively affected the dispersion of adult whiteflies. The distribution pattern of B. tabaci in the soybean crop was aggregated. Climatic factors, such as wind speed, increase the dispersion radius of the whitefly in the crop. Contribution to the field.

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“…Several authors have reported this behavior for other pest arthropods, such as Spodoptera frugiperda (JE Smith) in maize (Farias et al, 2001), and in cotton (Fernandes et al, 2002), Alabama argillacea (Hübner) in cotton (Fernandes et al, 2003), Diaphorina citri Kuwayama in citrus (Costa et al, 2010) and Euschistus heros (F.) in soybean (Souza et al, 2018).…”

Section: Resultsmentioning

confidence: 93%

SPATIAL DISTRIBUTION OF Chrysodeixis includens EGGS (WALKER, 1858) (LEPIDOPTERA: NOCTUIDAE) IN SOYBEAN CROP

Souza¹,

Barbosa

Carvalho

et al. 2019

Rev. Cien. Agr.

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Among pest insects that attack soybean crops, Chrysodeixis includens (Walker, 1858) (Lepidoptera: Noctuidae) looper caterpillar deserves attention due to its key pest status in soybean crops. The spatial distribution of C. includens eggs should be investigated in order to understand the behavior of this species in the area. The aim of this study was to investigate the spatial distribution of C. includens eggs in soybean crops. The experiment was conducted with SYN 9070 RR soybean variety in an experimental area of the Teaching, Research and Extension Farm (FEPE) of FCAV/ UNESP, Jaboticabal, SP, Brazil. The area of 0.6 ha was divided into 60 equidistant plots of 100 m² each. For the study of the spatial distribution of P. includens eggs in the area, the following dispersion indexes were used: variance / mean ratio (I), Morisita index (Id), Green coefficient (Cx), k exponent of the negative binomial distribution for each sampling. Regarding the probabilistic models that describe the spatial distribution of a given variable, the data adjustment to the Poisson and negative binomial distributions was tested. According to values obtained for dispersion indexes, egg distribution occurred in an aggregate way, and the negative binomial distribution was the most appropriate probabilistic model to represent the distribution of C. includens eggs in the study area.

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Spatial distribution of nymphs and adults of Euschistus heros (Fabricius, 1794) (Heteroptera: Pentatomidae) in transgenic soybean cultivars of different maturing cycles

Cited by 8 publications

References 9 publications

Spatial distribution and sampling plan of the phytophagous stink bug complex in different soybean production systems

Spatial distribution and sampling plan of the phytophagous stink bug complex in different soybean production systems

Population fluctuation and distribution of bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae) in soybean crops

SPATIAL DISTRIBUTION OF Chrysodeixis includens EGGS (WALKER, 1858) (LEPIDOPTERA: NOCTUIDAE) IN SOYBEAN CROP

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