African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6712

Full Length Research Paper

Spatial distribution of adults and nymphs of stink bug, Edessa meditabunda (Fabricius, 1974) (Hemiptera: Pentatomidae) on soybean Bt and non-Bt

Paulo Rogério Beltramin da Fonseca
  • Paulo Rogério Beltramin da Fonseca
  • Faculdade de Ciências Agrárias, Programa de Pós-Graduação em Agronomia (Produção Vegetal), UFGD. Rodovia Dourados-Itahum, Km 12, Caixa Postal 533, Bairro Aeroporto, CEP: 79804-970, Dourados-MS, Brasil.
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Marcos Gino Fernandes
  • Marcos Gino Fernandes
  • Faculdade de Ciências Agrárias, Programa de Pós-Graduação em Agronomia (Produção Vegetal), UFGD. Rodovia Dourados-Itahum, Km 12, Caixa Postal 533, Bairro Aeroporto, CEP: 79804-970, Dourados-MS, Brasil.
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Wagner Justiniano
  • Wagner Justiniano
  • Faculdade de Ciências Biológicas e Ambientais, Programa de Pós-Graduação em Entomologia e Conservação da Biodiversidade, UFGD. Rodovia Dourados-Itahum, Km 12, Caixa Postal 533, Bairro Aeroporto, CEP: 79804-970, Dourados-MS, Brasil.
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Leonardo Hiroito Cavada
  • Leonardo Hiroito Cavada
  • Faculdade de Ciências Agrárias, Programa de Pós-Graduação em Agronomia (Produção Vegetal), UFGD. Rodovia Dourados-Itahum, Km 12, Caixa Postal 533, Bairro Aeroporto, CEP: 79804-970, Dourados-MS, Brasil.
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Cácia Leila Tigre Pereira Viana
  • Cácia Leila Tigre Pereira Viana
  • Faculdade de Ciências Biológicas e Ambientais, Programa de Pós-Graduação em Entomologia e Conservação da Biodiversidade, UFGD. Rodovia Dourados-Itahum, Km 12, Caixa Postal 533, Bairro Aeroporto, CEP: 79804-970, Dourados-MS, Brasil.
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João Alfredo Neto da Silva
  • João Alfredo Neto da Silva
  • Faculdade de Ciências Agrárias, Programa de Pós-Graduação em Agronomia (Produção Vegetal), UFGD. Rodovia Dourados-Itahum, Km 12, Caixa Postal 533, Bairro Aeroporto, CEP: 79804-970, Dourados-MS, Brasil.
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  •  Received: 29 March 2014
  •  Accepted: 20 November 2015
  •  Published: 05 October 2017

Abstract

Knowledge of the dispersion of adults and nymphs of Edessa meditabunda in soybean model is needed to determine the control actions and thus enable proper use of strategies to avoid losses in production. This research aimed to conduct probabilistic analysis of the spatial distribution patterns of adults and nymphs of E. meditabunda in two regions in soybean Bt and non-Bt. For the evaluations, the method of cloth-to- beat was used, where one sample per plot was collected randomly from each experimental area. Evaluations were performed at 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91 and 98 days after emergence. 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) at 5% probability were calculated. The peak population of adults and nymphs of E. meditabunda was observed in the reproductive stage of soybean Bt and non-Bt in Dourados and Douradina. From the results obtained, it can be concluded that the Bt technology had the spatial arrangement of adults and nymphs of E. meditabunda, and is set in probabilistic arrangements with negative binomial distribution (aggregate) in the two regions surveyed. In non-Bt soybeans for adults and nymphs of E. meditabunda, spatial arrangements had set in probabilistic arrangements of positive and negative binomial distribution (uniform), as the days after emergence, for the region of Dourados and Douradina.

Key words: Glycine max L., damage, horizontal dispersion, spatial arrangement.