Use of artificial substrates of different colors for oviposition by the brown stink bug Euschistus heros (Hemiptera, Pentatomidae)

Krinski, Diones; Favetti, Bruna Magda; Leite-Junior, Admar F.; Silva-Gomes, Izabela T.

doi:10.1590/s0085-56262013005000023

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References 21 publications

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“…The crop is attacked by different insect-pests from sowing till harvest, among which, Euschistus heros (Fabricius, 1794) (Hemiptera: Pentatomidae) being the most abundant and prevalent in agricultural areas in Brazil (Corrêa-Ferreira & Panizzi, 1999;Panizzi et al, 2012;Krinski et al, 2013). Bedbugs occur in soybean at all stages and are harmful from the beginning of pod formation until grain maturity (Zambiazzi et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution of Adults and Nymphs of Euschistus heros (F.) (Hemiptera: Pentatomidae) on Bt and Non-Bt Soybean

Fonseca

Fernandes²,

Justiniano³

et al. 2014

JAS

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The knowledge of the arrangements of dispersion of insect pests in soybean cultivars is needed to improve the monitoring and control. The objective of this study was to evaluate the spatial distribution of adults and nymphs of Euschistus heros in Bt and non-Bt soybean into two regions, under field conditions. The experimental area located in Dourados and Douradina, Mato Grosso do Sul. For the evaluations we used the method of cloth-to-beat, where we collected one sample per plot randomly from each experimental area. Evaluations were performed at 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98 days after emergence (DAE). For data analysis, the rates of dispersion (variance/average Morisita index and exponent k  Negative Binomial Distribution) and theoretical frequency distributions (Poisson, Binomial and Negative Binomial Positive) were estimated at 1-5 % probability. Adults of E. heros are arranged differently for Bt and non-Bt soybean and between regions, since in both cultivars and locations, individuals of the populations evaluated in probabilistic set arrangements negative binomial distribution (aggregate), Poisson (random) and positive binomial distribution (uniform), as the days after soybean emergence. The nymphs of E. heros showed aggregated spatial arrangement, being distributed similarly for Bt and non-Bt soybean and regions, setting a negative binomial distribution model.

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Section: Introductionmentioning

confidence: 99%