Diversity and abundance of arthropods in subtropical rice growing areas in the Brazilian south

Fritz, Leila Lucia; Heinrichs, E. A.; Machado, Vilmar; Andreis, Tiago Finger; Pandolfo, Marciele; Salles, Silvia Martins de; Oliveira, Jaime Vargas de; Fiúza, Lidia Mariana

doi:10.1007/s10531-011-0083-3

Cited by 21 publications

(11 citation statements)

References 35 publications

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“…Other authors have also reported individuals of Eulophidae in rice crops (Nacro et al, 1997;Williams et al, 1999;Bayegan et al, 2015), and Gumovsky et al (2006) described a new species of Eulophidae, genus Closterocerus, parasitoid of Dicladispa armigera (Olivier, 1808) (Coleoptera: Chrysomelidae), a major rice pest in Southeast Asia and Australasia. In rice cultivation in Rio Grande do Sul, Eulophidae also was the most abundant parasitoid family and the phytophagous registered were Curculionidae, Pentatomidae, Delphacidae and Cicadellidae (Fritz et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Riparian forest fragments in rice fields under different management: differences on hymenopteran parasitoids diversity

2020

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Abstract Hymenopteran parasitoids are important biological control agents in agroecosystems, and their diversity can be increased with habitat heterogeneity. Thus, the purpose of the study is to evaluate the influence of distance of rice-growing areas from natural fragment, type of crop management (organic and conventional) and crop stages (vegetative and reproductive stages) on parasitoids family diversity. The work took place in two irrigated rice crops, one with organic management (O.M.) and another one with conventional management (C.M.), in the municipality of Nova Santa Rita, RS, Brazil, during the 2013/2014 and 2014/2015 seasons. The parasitoids were collected with Malaise trap arranged at different distances in relation to the native vegetation surrounding the rice crop in both places. Specimens were collected twice a month from seeding until the rice harvest. Average abundance between management, distances and rice development were compared. The most abundant families were Platygastridae, Mymaridae, Encyrtidae, Eulophidae and Trichogrammatidae. Parasitoid average abundance was significantly higher on OM only in the second season. There was a negative correlation between distance from native vegetation and parasitoid abundance in C.M. areas. There were differences in the composition of the parasitoid assembly between the phenological stages of rice.

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Section: Discussionmentioning

confidence: 99%

Riparian forest fragments in rice fields under different management: differences on hymenopteran parasitoids diversity

2020

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“…Rice fields harbour a rich and varied fauna than any other agricultural crop (Heckman, 1979;Fritz et al, 2011). The fauna is dominated by micro, meso and macro arthropods inhabiting the soil, water and vegetation sub-habitats of the rice fields.…”

Section: Introductionmentioning

confidence: 99%

A study on five sampling methods of parasitic hymenopterans in rice ecosystem

Daniel

Ramaraju

Kumar

et al. 2018

Journal of Biological Control

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For insect diversity studies to be of value, the sampling methods employed must produce samples representative of the community or taxon selected for the investigation. However, as yet, few evaluations on the variability and effectiveness of sampling methods have been undertaken. The survey was carried out in the rice fields during 2015-16 in Paddy Breeding Station, Tamil Nadu Agricultural University, Coimbatore. From this study a total of 1,019 parasitoid individuals were collected. Among six different collection methods employed for sampling hymenopteran parasitoids in rice ecosystem, the yellow pan trap at ground level was found to be the most effective method in trapping the parasitoids (27.2 ± 2.56 parasitoids per day) followed by sweep net method (12.1 ± 1.03 parasitoids per day). The next best sampling method is yellow pan trap erected at canopy level which recorded a mean of 9.2 ± 2.26 parasitoids per day. The other three traps viz., malaise trap, suction trap and light trap were found to collect less number (<1.5) of parasitoids per day.

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“…In these ecosystems, arthropods are found in an intermediate position in the food chain and include herbivores, saprophytes, parasites and predators of other animals (Fritz et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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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Diversity and abundance of arthropods in subtropical rice growing areas in the Brazilian south

Cited by 21 publications

References 35 publications

Riparian forest fragments in rice fields under different management: differences on hymenopteran parasitoids diversity

Riparian forest fragments in rice fields under different management: differences on hymenopteran parasitoids diversity

A study on five sampling methods of parasitic hymenopterans in rice ecosystem

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

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