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No direct effects of resistant soybean cultiva IAC-24 on Podisus nigrispinus (Heteroptera: Pentatomidae) Translated title: Efectos no directos de resistencia del cultivar de soya IAC-24 sobre Podisus nigrispinus (Heteroptera: Pentatomidae)

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      Abstract

      The parameters of survival, development and reproduction of Podisus nigrispinus Dallas, 1851 (Heteroptera: Pentatomidae) may be affected by feeding on soybean (Glycine max L. Merr.; Fabaceae) cultivars. The direct effect was evaluated of the insect-resistant soybean 'IAC-24' (insect-susceptible soybean 'UFVS-2006' + pupae of Tenebrio molitor L., 1758 Coleoptera: Tenebrionidae versus 'IAC-24' plants + pupae of T. molitor) in the nymph and adult stages of the predator P. nigrispinus. The duration of the nymph stage was similar between treatments, but 'IAC-24' reduced the duration of the IV instar of this predator. The survival of P. nigrispinus was similar between treatments in the instars I, II, IV and V and in the nymph stage, but the survival of the III instar was longer with 'IAC-24' plants. The body mass of nymphs in the first day of the III, IV, and V instars after ecdysis and newly emerged adults; reproductive characteristics (periods of pre-oviposition, oviposition, post-oviposition and egg incubation; egg laying interval, number of egg masses per female, nymphs per female, nymphs per egg mass and percentage of nymphs hatching) and life span of males and females of P. nigrispinus were similar between treatments. The resistant soybean 'IAC-24' showed no direct deleterious effects on P. nigrispinus, which implies its innocuity and compatibility with this predator.

      Translated abstract

      Los par ámetros de supervivencia, desarrollo y reproducción de Podìsus nìgrìspìnus Dallas, 1851 (Heteroptera: Pentatomidae) pueden verse afectados por la alimentación en cultivos de soya (Glycìne max L. Merr.; Fabaceae). Se evaluó el efecto directo de la soya 'IAC-24' resistente a insectos (soya 'UFVS-2006' susceptible a insectos + pupas de Tenebrìo molìtor L., 1758 Coleoptera: Tenebrionidae vs. plantas 'IAC-24' + pupas de T. molìtor) sobre los estados de ninfa y adulto del depredador P. nìgrìspìnus. La duración del estado ninfal fue similar entre tratamientos, no obstante 'IAC-24' redujo la duración del IV estado de este depredador. La supervivencia de P. nìgrìspìnus fue similar entre los tratamientos en los estados I, II, IV y V y en el estado de ninfa, la supervivencia del estado III fue mayor con las plantas 'IAC-24'. La masa corporal de las ninfas en el primer día, en los estados III, IV, y V después de la ecdisis y adultos recién emergidos; características reproductivas (períodos de pre-oviposición, oviposición, post-oviposición e incubación de los huevos; intervalo de colocación de los huevos, número de masa de huevos por hembra, ninfas por hembra, ninfas por masa de huevos y porcentaje de eclosión de ninfas) y vida útil de machos y hembras de P. nìgrìspìnus fueron similares entre los tratamientos. La soya resistente 'IAC-24' no mostró efectos nocivos directos en P. nìgrìspìnus, lo que implica su inocuidad y compatibilidad con este depredador.

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      Many terrestrial communities include omnivorous arthropods that feed on both prey and plant resources. In this review we first discuss some unique morphological, physiological, and behavioral traits that enable omnivores to exploit such dissimilar foods, and we explore possible evolutionary pathways to omnivory. We then examine possible benefits and costs of omnivory, describe the relationships between omnivory and other high-order complex trophic interactions, and consider the stability level of communities with closed-loop omnivory. Finally, we explore some of the implications of omnivory for crop damage and for biological, chemical, and cultural control practices. We conclude that the growing realization of the ubiquity of omnivory in nature may require a change in our view of the structure and function of ecological systems.
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          Populations of the Brown Planthopper, Nilaparvata lugens (Stål) (Homoptera: Delphacidae), and Its Predators on Rice Varieties with Different Levels of Resistance

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            Author and article information

            Affiliations
            [1 ] Universidade Federal de Viçosa Brazil
            [2 ] Universidade Federal de Viçosa Brazil
            [3 ] Instituto Agronômico de Campinas Brazil
            [4 ] Universidade Federal de Viçosa Brazil
            Contributors
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Journal
            chiljar
            Chilean journal of agricultural research
            Chilean J. Agric. Res.
            Instituto de Investigaciones Agropecuarias, INIA (Chillán )
            0718-5839
            December 2012
            : 72
            : 4
            : 528-534
            S0718-58392012000400011 10.4067/S0718-58392012000400011

            http://creativecommons.org/licenses/by/4.0/

            Product
            Product Information: SciELO Chile
            Categories
            AGRICULTURE, MULTIDISCIPLINARY
            AGRONOMY

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