Sobrevivência e desenvolvimento larval de Spodoptera frugiperda (J E Smith) (Lepidoptera: Noctuidae) em hospedeiros alternativos

Sá, Veríssimo Gibran Mendes de; Fonseca, Bernardo V C; Boregas, K. G. B.; Waquil, J. M.

doi:10.1590/s1519-566x2009000100012

Cited by 33 publications

(12 citation statements)

References 14 publications

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“…Os demais clones, juntamente com a dieta artificial (padrão de suscetibilidade), proporcionaram sobrevivência média acima de 66,7% (Figura 1). Sá et al (2009) já haviam relatado a adequação dessa forrageira para lagartas de S. frugiperda (98% de sobrevivência).…”

Section: Resultsunclassified

“…Silveira et al (1997) verificaram, em diferentes clones de milho, que a menor duração na fase de lagarta de S. frugiperda estava relacionada à maior biomassa; essa correlação também foi observada por Sá et al (2009). Quanto mais curto for o período de desenvolvimento larval, sem redução da biomassa, mais adequado é o alimento ofertado para o desenvolvimento do inseto (Boregas et al, 2013).…”

Section: Resultsunclassified

“…Este é o caso, por exemplo, do consórcio de lavouras de milho com forrageiras da espécie Urochloa, que, no presente trabalho, mostrou ser hospedeira relativamente favorável a S. frugiperda. Esse fato, associado ao comportamento alimentar polífago desse inseto-praga, facilita a sua multiplicação em diferentes espécies, durante a maior parte do ano (Sá et al, 2009;Campos et al, 2011).…”

Section: Resultsunclassified

“…Porém, o uso desse sistema de consorciação também contribui para que a lagarta-do-cartucho [Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae)], espécie polífaga que ataca diversas culturas de valor econômico, como milho e forrageiras (Lopes et al, 2008;Sá et al, 2009;Casmuz et al, 2010;Campos et al, 2011;Boregas et al, 2013), tenha hospedeiros durante todo o ano, para o seu desenvolvimento (Waquil et al, 2008).…”

Section: Introductionunclassified

“…Nesse cenário, a seleção de plantas resistentes a esse inseto contribui para a definição e a implementação do programa de manejo integrado a ser adotado no sistema de ILPF. Sá et al (2009) O objetivo deste trabalho foi avaliar e selecionar clones de braquiária (Urochloa ruziziensis) resistentes à lagarta-do-cartucho (Spodoptera frugiperda), para uso em sistema de integração lavoura-pecuária-floresta.…”

Section: Introductionunclassified

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Seleção de clones de braquiária para resistência à lagarta-do-cartucho

Auad

Sobrinho

Mendes

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar e selecionar clones de braquiária (Urochloa ruziziensis) resistentes à lagarta-do-cartucho, Spodoptera frugiperda (Lepidoptera: Noctuidae), para uso em sistema de integração lavoura-pecuária-floresta. Foram avaliados 147 clones de U. ruziziensis em delineamento inteiramente casualizado, com três repetições. Como testemunha e padrão de suscetibilidade, foi utilizada uma dieta artificial adequada ao desenvolvimento do inseto. Folhas dos diferentes clones de U. ruziziensis foram coletadas e oferecidas como alimento aos insetos, mantidos individualizados em unidades de criação. Foram avaliadas a sobrevivência, a duração e a biomassa de lagartas e pupas. Observaram-se diferenças significativas entre os clones para todas as características avaliadas, o que evidencia a influência acentuada dos clones de U. ruziziensis no desenvolvimento de S. frugiperda. Foram identificados 20 clones nos quais não houve desenvolvimento da lagarta e 55 clones nos quais houve sobrevivência média das lagartas de 33%. Para os demais clones, que se mostraram melhores hospedeiros, o desenvolvimento do inseto foi afetado pela maior duração do estágio larval e pela redução da biomassa da pupa. Os resultados obtidos são indicativos do potencial de utilização de clones de Urochloa ruziziensis para redução de populações de Spodoptera frugiperda em sistema de integração lavoura-pecuária-floresta.Termos para indexação: Spodoptera frugiperda, Urochloa ruziziensis, integração lavoura-pecuária-floresta, resistência de plantas. Selection of signal grass clones for resistance to fall armywormAbstract -The objective of this work was to evaluate and select signal grass (Urochloa ruziziensis) clones resistant to fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae), for use in a crop-livestock-forest integration system. One hundred and forty-seven clones of U. ruziziensis were evaluated in a completely randomized design with three replicates. An artificial diet, adequate for insect development, was used as a control and susceptibility standard. Leaves of different U. ruziziensis clones were collected and offered as food to the insects, kept individually in rearing units. Larval survival, duration, and biomass of larvae and pupa were evaluated. Significant differences were observed between clones for all evaluated traits, showing the marked effect of U. ruziziensis clones on the development of S. frugiperda. Twenty clones were identified in which there was no development of larvae and 55 clones in which there was an average larval survival of 33%. For the other clones, which were better hosts, insect development was affected by the longer larval stage and by the reduction in pupa biomass. The obtained results show the potential of using Urochloa ruziziensis clones for the reduction of Spodoptera frugiperda populations in a crop-livestock-forest integration system.

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Section: Resultsunclassified

Section: Introductionunclassified

See 3 more Smart Citations

Seleção de clones de braquiária para resistência à lagarta-do-cartucho

Auad

Sobrinho

Mendes

et al. 2016

Pesq. agropec. bras.

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Intercropped Bt and non‐Bt corn with ruzigrass (Urochloa ruziziensis) as a tool to resistance management of Spodoptera frugiperda (JE Smith, 1797) (Lepidoptera: Noctuidae)

Jacques

Degrande

Gauer

et al. 2021

Pest Management Science

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BACKGROUND: Corn intercropped with ruzigrass is common in Brazil, and it can improve the physicochemical features of soils, increase water retention, and suppress the emergence of resistant weeds and soil nematodes. As both corn and ruzigrass are hosts to Spodoptera frugiperda (the main corn pest in South America), the cultivation of both these plants in the same place at one time motivates investigation into the pest population dynamics. We hypothesize that the intercropping system influences S. frugiperda pressure and leaf injury in corn. Considering that if corn hybrids with high dose toxin expression are used, ruzigrass may be a potential host to susceptible S. frugiperda larvae, consequently an alternative refuge and be included as a tool for the resistant management of Bt corn. To test these hypotheses about the use of ruzigrass as an alternative host of S. frugiperda in an intercropping system with corn, we conducted field trials in three seasons to verify S. frugiperda population dynamics and leaf injury to crop systems. In addition to phenotypic evaluation, we also characterized molecularly S. frugiperda strains collected in corn and ruzigrass to identify strain differences.RESULTS: The insects collected in both corn and ruzigrass were identified as corn strains. Ruzigrass was used as a S. frugiperda host during all crop cycles. The intercropped system did not increase the S. frugiperda population or leaf injury on Bt corn. CONCLUSION:The results suggest that the intercropped system is not prejudicial to Bt corn cultivation since high dose concept applies to all larvae instars. The results also suggest that ruzigrass may be used as a promising alternative refuge in Bt corn agroecosystems, if compliance with management strategies is followed.

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Influence of fall armyworm previous experience with soybean genotypes on larval feeding behavior

Júnior

Souza

Costa

et al. 2016

Arthropod-Plant Interactions

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Previous experience on host plants can modify insect feeding behavior. Because insect habituation and induction of preference to host plants are variable across species of plants and insects, it is necessary to investigate each insect-plant interaction to determine whether this phenomenon occurs or not in the system. In this study we investigated the potential occurrence of habituation and induction of preference in fall armyworm (FAW) Spodoptera frugiperda to soybean genotypes. Neonate FAW larvae reared on artificial diet were divided into four treatment groups and fed for one generation with either the resistant soybeans PI 227687 or IAC 100 or the susceptible soybeans BRS Valiosa RR or IGRA RA 626 RR. Biological parameters of FAW were recorded. Eggs obtained from FAW of each genotype group were separated, and the newly hatched larvae were fed on the same genotypes experienced by their parents for additional 8 days. FAW larval preference and leaf area consumed were evaluated in choice feeding assays with the four soybean genotypes within a 24-h period. Genotypes PI 227687 and IAC 100 negatively affected FAW development, demonstrating they are FAW-resistant. FAW larvae exposed to both resistant genotypes consumed more foliage of genotype IGRA RA 626 RR in the choice assays, whereas larvae reared on both susceptible genotypes did not show any preference. From our preliminary study, FAW does not show habituation and induction of preference toward the experienced soybean genotypes. The importance of our findings to host plant resistance and insect-plant biology fields is discussed.

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Sobrevivência e desenvolvimento larval de Spodoptera frugiperda (J E Smith) (Lepidoptera: Noctuidae) em hospedeiros alternativos

Cited by 33 publications

References 14 publications

Seleção de clones de braquiária para resistência à lagarta-do-cartucho

Seleção de clones de braquiária para resistência à lagarta-do-cartucho

Intercropped Bt and non‐Bt corn with ruzigrass (Urochloa ruziziensis) as a tool to resistance management of Spodoptera frugiperda (JE Smith, 1797) (Lepidoptera: Noctuidae)

Influence of fall armyworm previous experience with soybean genotypes on larval feeding behavior

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