Seasonal abundance and mortality of Oebalus poecilus (Dallas) (Hemiptera: Pentatomidae) in a hibernation refuge

Santos, R. S. S. dos; Diefenbach, Lucia Maria Lopes de Almeida Guedes; Romanowski, Helena Piccoli; Prando, Honorio Francisco; Antochevis, Rita de Cassia

doi:10.1590/s1519-69842006000300010

Cited by 14 publications

(22 citation statements)

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“…Pentatomidae presents pest species important for rice crop (Santos et al, 2006). Although Tettigoniidae has been classified as phytophagous preferably in other studies, in this work was registered the genus Conocephalus, considered predatory of adult individuals of Sciomyzidae and eggs of the rice stink bug (Mello, 1981;Ito et al, 1995).…”

Section: Discussionmentioning

confidence: 89%

Insect diversity in organic rice fields under two management systems of levees vegetation

2017

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Simplified environments characterize agroecosystems, reducing the diversity of associated plants, which are not cultivated for economic purposes, causing unbalances that can promote the emergence of cultivated plants pests, as well as the reduction of their natural enemies. Management systems that increase diversity in agroecosystems can extend the action of natural enemies of pests. Studies to understand the diversity of insects associated with rice cultivation and determine their ecological guilds can provide information about the composition and structure of such ecosystems, which can be applied to integrated pest management. Therefore, the study aimed to describe and compare groups of insects in irrigated rice fields, with organic management using two different systems of levees vegetation management, and relate them to the phenological states of rice cultivation (seedling, vegetative, and reproductive). Samples were taken in a plantation located in Águas Claras district of Viamão, RS. The total area of 18 ha was divided into two. A subarea called not cut (NC), where wild vegetation of levees was maintained, and the subarea named cut (C), where monthly cuts were made to levees vegetation, from the beginning of soil preparation until the harvest. From October 2012 to March 2013 were held weekly collections in quadrats randomly located in both the rice fields and the levees. A total of 800 insects were collected, 429 in the C subarea and 371 in the NC. There were identified 97 morphospecies in the C and 108 in NC, being 54 shared between the subareas. The captured insects were grouped into guilds: saprophages (C = 38.2%; NC = 27.5%), phytophagous (C = 28.5%; NC = 33.2%), entomophagous (grouping parasitoids and predators) (C = 29.4%; NC = 35%) and finally other insects (C = 4 %; NC = 4.3%). The peak abundance of phytophagous and entomophagous was registered in the vegetative stage of rice. At the same stage the UPGMA analysis showed that similarity in species composition was greater than 90% in the groups obtained in the paddy fields of C and NC subareas. The vegetation of levees can positively influence the presence of entomophagous in the field. Although the abundance did not change clearly, the greatest diversity in the NC areas of all the groups, may contribute to the maintenance of ecological services expanding the system resilience.Keywords: organic rice, Insecta, diversity, richness, abundance. Diversidade de insetos em arroz irrigado orgânico sob dois manejos da vegetação das taipas ResumoOs agroecossistemas se caracterizam por ambientes simplificados, com redução da diversidade de plantas associadas, que não são as cultivadas para fins econômicos, causando desequilíbrios que podem levar ao surgimento de insetos nocivos, assim como a diminuição de seus inimigos naturais. Sistemas de manejo que priorizem o aumento da diversidade no agroecossistema podem ampliar a ação de inimigos naturais de pragas. Estudos que busquem entender a diversidade de insetos associados ao cultivo de arroz irrigado, bem...

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Section: Discussionmentioning

confidence: 89%

Insect diversity in organic rice fields under two management systems of levees vegetation

2017

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“…Panizzi & Vivan (1997) demonstraram que a hibernação em Euschistus heros, em Londrina (PR), teve duração de seis meses. Santos et al (2006) verificaram, para Oebalus poecilus, período entre sete e oito meses. Essas diferenças podem ser atribuídas, além de fatores ligados à própria espécie, ao seu comportamento alimentar e, também, às características meteorológi-cas intrínsecas das regiões de estudo.…”

Section: Resultsunclassified

Abundância sazonal de percevejo-do-colmo do arroz

Botta

Silva

Pazini

et al. 2014

Pesqui. Agropecu. Trop.

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A população de percevejo-do-colmo (Tibraca limbativentris) vem elevando-se, nos últimos anos, posicionando-o como uma das principais pragas da cultura do arroz irrigado, na região do Planalto da Campanha do Rio Grande do Sul. Fatores favoráveis ao longo do ano propiciam condições para sua infestação nas lavouras e posterior hibernação. O presente estudo objetivou verificar a variação populacional do percevejo do-colmo, em condições de lavoura comercial de arroz irrigado e sítios de hibernação. Para tanto, realizou-se levantamento populacional de ninfas e adultos. Verificou-se que o fotoperíodo e a temperatura foram os fatores que mais afetaram a população do inseto, levando a um período de hibernação de 10 meses. As operações de manejo também influenciaram na redução da população.

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“…This family has important parasitoids of rice pests like Oebalus poecilus (Dallas) (Hem. : Pentatomidae) that can overwinter, when the rice is not in the field, in bamboo litter or grass clumps (Santos et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Rice (Oryza sativa L.) can be cultivated in highlands, as it is suitable for flooding, and it can also be cultivated in stormwater plains (Bambaradeniya and Amerasinghe, 2003); however, more than 75% of rice production is from an irrigated crop system (Pereira et al, 2005). In Brazil, the irrigated rice agroecosystem is responsible for approximately 70% of the national production (Beutler, 2013).…”

Section: Introductionmentioning

confidence: 99%

Influence of the vegetation management of the leeves in irrigated rice organic in diversity of Hymenoptera parasitoids

Simões-Pires

Jahnke

2016

Braz. J. Biol.

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Among the natural enemies of insect pests in rice fields, parasitoids are especially notable. To better understand the space-time dynamics of these insects, the objectives of this study were to describe and compare groups of parasitoids in organic irrigated rice fields using two management approaches for levee vegetation, and to relate them to the phenological stages of rice cultivation (the seedling, vegetative, and reproductive stages). The samples were taken in a plantation located in Viamão, RS, Brazil. The total area of 18 ha was divided into two parts: a no-cut (NC) subarea in which the wild vegetation of the levees was maintained, and a cut (C) subarea in which the levee vegetation was cut monthly. In each subarea, four Malaise traps considered as pseudo-replicas were installed and remained in the field for 24 hours at each sampling location. Collections occurred twice a month from the beginning of cultivation (October 2012) until harvest (March 2013). A total of 3,184 Hymenoptera parasitoids were collected: 2,038 individuals in the NC subarea and 1,146 in the C subarea. We identified 458 morphospecies distributed in 24 families. Mymaridae was the most abundant and Eulophidae was the richest in both subareas. A total of 198 morphospecies was shared between the subareas, including Platygastridae, Eulophidae, and Mymaridae, which were the families with the highest number of shared species. The richness and abundance of parasitoids varied according to their phenological developmental stages, with peak abundance registering during the vegetative period. The Morisita index identified three groupings, indicating a similarity that was related to the three phases of rice growth and development: seedling, vegetative and post-harvest.Keywords: Oryza sativa, conservational biological control, habitat management. Influência do manejo da vegetação das taipas em arroz orgânico irrigado na diversidade de himenópteros parasitoides ResumoEntre os inimigos naturais de insetos pragas em campos de arroz, parasitoides são especialmente notáveis. Para melhor entender a dinâmica espaço-temporal destes insetos, os objetivos desse estudo foram descrever e comparar os grupos de parasitoides em campos de arroz orgânico irrigado utilizando duas abordagens de manejo da vegetação das taipas, e relacioná-los com os estádios fenológicos da cultura (plântula, vegetativo e reprodutivo). As amostragens foram realizadas em uma plantação localizada em Viamão, RS. A área total de 18 ha foi dividida em duas partes: uma subárea não roçada (NR) na qual a vegetação espontânea das taipas foi mantida, e uma roçada (R) subárea em que a vegetação das taipas foi roçada mensalmente. Em cada subárea, quatro armadilhas Malaise consideradas pseudo-réplicas foram instaladas e mantiveram-se no campo durante 24 horas, em cada local de amostragem. As coletas ocorreram duas vezes por mês, desde o início do cultivo (outubro de 2012) até a colheita (março de 2013). Um total de 3.184 himenópteros parasitoides foram coletados: 2.038 indivíduos na subárea N...

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Seasonal abundance and mortality of Oebalus poecilus (Dallas) (Hemiptera: Pentatomidae) in a hibernation refuge

Abstract: Oebalus poecilus (Dallas) is an important pest affecting irrigated rice in

Cited by 14 publications

References 14 publications

Insect diversity in organic rice fields under two management systems of levees vegetation

Insect diversity in organic rice fields under two management systems of levees vegetation

Abundância sazonal de percevejo-do-colmo do arroz

Influence of the vegetation management of the leeves in irrigated rice organic in diversity of Hymenoptera parasitoids

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