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Nymphal and adult performance of genetically determined types of Nezara viridula (L.) (Heteroptera: Pentatomidae), under different temperature and photoperiodic conditions Translated title: Desempenho de ninfas e de adultos de tipos geneticamente determinados de Nezara viridula (L.) (Heteroptera: Pentatomidae) sob diferentes condições de temperatura e fotoperíodo

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      The southern green stink bug, Nezara viridula (L.), has several genetically determined types, three being the most common in Brazil: G (f. smaragdula - green body), O (f. torquata - green body with lateral and median lobes of the head and anterior margin of the pronotum yellow), and Y (f. aurantiaca - gold or orange body). Nymphal and adult performance of these types was studied at 15ºC/10hL, 22ºC/12hL, and 29ºC/14hL. Mean total nymph mortality in all types at 15ºC/10hL was high (ca. 80%), especially for type G (98%); at 22ºC/12hL, the greatest mortality (55%) occurred in type G, and at 29ºC/14hL in type Y (65%). In general, at combinations of higher temperatures and longer photoperiods, nymphs developed faster. Adult longevity of type G decreased from ca. 88 days at 15ºC/10hL to ca. 57 days at 22ºC/12hL and 29ºC/14hL; for type O, adult longevity varied from ca. 81 days at 22ºC/12hL to ca. 55 days at 29ºC/14hL; type Y showed the shortest lifespan, in particular at the extremes of temperatures/photoperiods (< 20 days). Types G and Y did not reproduce at 15ºC/10hL, and type Y did not reproduce at 29ºC/14hL; type O reproduced at all three abiotic conditions. These results demonstrate that type O is the most adapted to the cooler temperature and shorter photoperiod, which explains its greater abundance in south Brazil.

      Translated abstract

      O percevejo verde, Nezara viridula (L.), possui vários tipos determinados geneticamente sendo três mais comuns no Brasil: G (f. smaragdula corpo verde), O (f. torquata corpo verde com os lobos laterais e medianos da cabeça e margem anterior do pronoto de cor amarela), e Y (f. aurantiaca corpo amarelo ou alaranjado). Estudou-se a performance das ninfas e dos adultos desses tipos a 15ºC/10hL, 22ºC/12hL e 29ºC/14hL. A mortalidade das ninfas dos três tipos a 15ºC/10hL foi alta (ca. 80%), em especial para o tipo G (98%); a 22ºC/12hL, a maior mortalidade (55%) ocorreu para o tipo G, e a 29ºC/14hL para o tipo Y (65%). Em geral, à medida que aumentou a temperatura e o fotoperíodo as ninfas completaram o ciclo mais rápido. A longevidade dos adultos do tipo G decresceu de ca. 88 dias a 15ºC/10hL a ca. 57 dias a 22ºC/12hL e a 29ºC/14hL; para o tipo O a longevidade variou de ca. 81 dias a 22ºC/12hL a ca. 55 dias a 29ºC/14hL; e para o tipo Y a longevidade foi a menor, apresentando redução drástica (< 20 dias) nos extremos das temperaturas/fotoperíodos. Os tipos G e Y não se reproduziram a 15ºC/10hL, e o Y não se reproduziu a 29ºC/14hL; o tipo O reproduziu-se nas três temperaturas/fotoperíodos. Esses resultados demonstram que o tipo O é mais adaptado às temperaturas/fotoperíodos menores o que explica a sua maior ocorrência no extremo sul do Brasil.

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      Most cited references 17

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      Wild hosts of Pentatomids: ecological significance and role in their pest status on crops.

      Phytophagous stink bugs (Heteroptera: Pentatomidae) are important pests of many crops, feeding mostly on seeds and immature fruits. During feeding they introduce their stylets to remove the cells' contents. The resulting damage includes drop and/or malformation of seeds and fruits. As stink bugs are generally polyphagous, they feed on cultivated and uncultivated plants; consequently, wild host plants play an important role in the increase in population levels of agricultural pest species. These plants are important food resources for development of nymphs and reproduction of adults. Because these bugs are multivoltine and feed in general on temporarily restricted food plants, host-switching from food plants of nymphs to those of adults is common and has varying effects on adult performance depending on the quality of the foods involved. Although polyphagous, local populations of many pentatomid species may show specific feeding habits, restricting their host range to fewer plant species. The knowledge of host plant sequences, including cultivated and uncultivated hosts, and the use of wild hosts as trap plants will improve management of pest species. Finally, future research should focus on determining which plants are preferably used by stink bugs, how they affect insect performance, at what rate populations increase on these plants, and how effective natural enemies are at this time.
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          Studies on the adult polymorphism in the southern green stink bug,Nezara viridula (hemiptera: Pentatomidae)


            Author and article information

            [1 ] Universidade Federal do Paraná Brazil
            [2 ] Fundação de Apoio a Pesquisa Agropecuária de Mato Grosso
            [3 ] Empresa Brasileira de Pesquisa Agropecuária
            Role: ND
            Role: ND
            Neotropical Entomology
            Neotrop. entomol.
            Sociedade Entomológica do Brasil (Londrina )
            December 2005
            : 34
            : 6
            : 911-915
            S1519-566X2005000600006 10.1590/S1519-566X2005000600006


            Product Information: SciELO Brazil


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