Consumo foliar de cultivares de arroz irrigado por Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Grützmacher, Anderson Dionei; Nakano, Octávio; Martins, José Francisco da Silva; Loeck, Alci Enimar; Grützmacher, Douglas

doi:10.1590/s0301-80591999000300019

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…In the laboratory, leaves were washed in water and then immersed in 1% hypochlorite solution for 5 min to eliminate potential pathogens. Initially larvae were fed with leaf discs of approximately 10 cm 2 ; once they reached the third-instar stage, they were provided with leaf discs of approximately 20 cm 2 (Grützmacher, 1999). Leaf discs were replaced daily during the larval period.…”

Section: Methodsmentioning

confidence: 99%

Induction of resistance of corn plants to Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) by application of silicon and gibberellic acid

Alvarenga

Moraes

Auad³

et al. 2017

Bull. Entomol. Res.

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The aim of this study was to evaluate the effects of silicon application and administration of the phytohormone gibberellic acid on resistance of the corn plants to the fall armyworm (FAW), Spodoptera frugiperda, and their vegetative characteristics. We evaluated larval and pupal duration, survival and biomass, and adult longevity, malformation and fecundity of S. frugiperda after feeding on plant matter treated with silicon and/or gibberellic acid. The feeding preference of FAW first-instar larvae, the total leaf area consumed by the insects, and the vegetative parameters of corn plants were also evaluated. No significant differences were observed in the measured parameters of larval and pupal stages of S. frugiperda in response to silicon or gibberellic acid. In adult stage insects, the number of eggs per female was significantly reduced in insects derived from larvae fed plants treated with silicon or gibberellic acid. In a non-preference test, 48 h after release, caterpillars preferred control untreated plants and consumed less matter from plants that had received hormonal treatment (gibberellic acid). Gibberellic acid also altered the vegetative characteristics of plants, by increasing their height, shoot fresh and dry mass, and silicon content. We conclude that gibberellic acid can alter the vegetative characteristics and silicon uptake of corn plants, leading to a reduction in their consumption by S. frugiperda larvae and a decrease in female insect oviposition.

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Section: Methodsmentioning

confidence: 99%

Induction of resistance of corn plants to Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) by application of silicon and gibberellic acid

Alvarenga

Moraes

Auad³

et al. 2017

Bull. Entomol. Res.

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“…2) (Lopes et al 1997). A variação de consumo em diferentes plantas, e até mesmo em diferentes cultivares, ocorreu em estudos com S. frugiperda realizados por Grützmacher et al (1999), nas cultivares de arroz irrigado BR-IRGA 410 e Embrapa 6-CHUÍ, onde o consumo médio no último ínstar foi de 65,50 e 69,50 cm 2 , respectivamente. Em couve, Machado et al (1985) constataram o consumo médio no 6 o ínstar de 26,6 cm 2 por S. frugiperda.…”

Section: Consumo De Folhas De Algodoeirounclassified

Biologia de Spodoptera eridania (Cramer) (Lepidoptera: Noctuidae) em diferentes hospedeiros

Santos¹,

Meneguim²,

Neves³

2005

Neotrop. Entomol.

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-Spodoptera eridania (Cramer) is a pest under expansion in cotton and soybean fields in the cerrado, and biology studies are needed on different hosts. In order to gain knowledge about the biology and leaf intake of S. eridania on cotton, soybean and morning glory (Ipomoea grandifolia), newly-hatched caterpillars were individualized and reared in the laboratory (27 ± 2 o C, R.H. 60 ± 10%, photophase of 14h). Parameters related to biology, leaf intake and reproduction were observed. The larval development period of caterpillars was shorter when fed on cotton and morning glory leaves than on soybean leaves, even though, the survival on soybean had been satisfactory (80%). Caterpillars fed on cotton and morning glory leaves had similar mean pupal weights, however 1.3 and 1.4 times higher than those obtained for male and female pupae, respectively, on soybean leaves. The soybean also influenced prepupal (37.5%) and pupal survival (68.3%) negatively, in contrast with the values obtained on the two other hosts, which were above 91.8%. In general, the soybean leaves were the least suitable for the development of S. eridania, causing 6.3% of pupal deformities. Variables like the pre-oviposition and oviposition periods, number of egg clutches/female and total number of eggs/female were not affected by the diets. Even though cotton leaves were less consumed, they provided good development to the insect. The morning glory weed was shown a suitable alternate host for the species, allowing its development and reproduction in the absence of cultivated hosts.KEY WORDS: Insecta, nutritional ecology, alternative host RESUMO -Spodoptera eridania (Cramer) é uma praga em expansão nas culturas de algodão e de soja no cerrado, necessitando de estudos de biologia em diferentes hospedeiros. Com o objetivo de conhecer a biologia e o consumo foliar de S. eridania em algodoeiro, soja e corda-de-viola (Ipomoea grandifolia), este inseto foi criado em laboratório (27± 2 o C, UR 60± 10%, fotofase de 14h), a partir de lagartas recém-eclodidas e individualizadas. Foram observados parâmetros relacionados à biologia, ao consumo foliar e à reprodução quando alimentadas nos três hospedeiros. O período de desenvolvimento larval foi menor nos insetos alimentados com algodoeiro e corda-de-viola do que em soja, embora a sobrevivência em soja tenha sido satisfatória (80%). Lagartas alimentadas com folhas de algodoeiro e corda-de-viola tiveram peso médio de pupas semelhante, porém 1,3 e 1,4 vezes maior do que o obtido por pupa macho e fêmea, respectivamente, em folhas de soja. A soja, também influenciou negativamente a sobrevivência de pré-pupa e pupa, contrastando com os valores, acima de 91,8%, nos outros dois hospedeiros. Em geral, a folha de soja foi a menos adequada para S. eridania, causando 6,3% de deformidade em pupas. Variáveis como períodos de pré-oviposição, oviposição, número de posturas/fêmea e o total de ovos/fêmea, não foram afetados pelas dietas. Embora as folhas de algodoeiro tenham sido as menos consumidas, elas proporcionaram ...

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“…Embora esta espécie utilize o milho como alimento preferencial, observa-se o aumento de sua população em cultivos de arroz de sequeiro e irrigado em função desta gramínea possuir maior adequação nutricional a S. frugiperda (Grützmacher et al,1999).…”

Section: Introductionunclassified

Não preferência a Spodoptera frugiperda (Lepidoptera: Noctuidae) induzida em arroz pela aplicação de silício

Nascimento

Assis

Moraes

et al. 2014

Agraria

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RESUMOA lagarta Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) é um inseto-praga polífago que causa danos consideráveis à cultura de arroz, com redução na produção e diminuição da qualidade de grãos. O objetivo deste trabalho foi avaliar a preferência alimentar e a sobrevivência dessas lagartas em plantas de arroz tratadas com silício (Si). Os tratamentos foram: 1) testemunha (sem aplicação de Si); 2) Si (drench) e 3) Si (foliar). Para avaliar a preferência em relação ao consumo foliar foi utilizado o DBC com três tratamentos e 20 repetições em teste de livre escolha. Foram liberadas 12 lagartas de 2 o ínstar no centro da placa de Petri e após 24, 48 e 72 h da infestação elas foram contabilizadas em cada tratamento sendo que após 72 h também se determinou a área foliar consumida. Para avaliação da mortalidade adotou-se o DIC com três tratamentos e 20 repetições, com liberação de 12 lagartas de 2 o ínstar por placa de Petri e após 24, 48 e 72 h da liberação foi determinada a sobrevivência. Pelos resultados obtidos conclui-se que a aplicação de silício em arroz afeta a preferência alimentar e a sobrevivência de lagartas de S. frugiperda.Palavras-chave: ácido silícico, insecta, lagarta das folhas, MIP, Oryza sativa L. Feeding non preference of Spodoptera frugiperda (Lepidoptera: Noctuidae) induced by silicon application in rice crop ABSTRACTThe caterpillar Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae) is a polyphagous insect pest that causes considerable damages in rice crop, such as reduction in production and in grain quality. We aimed in this work to assess the feeding preference as well as larvae survival in rice plants treated with silicon (Si). Treatments were compounded by different ways of Si application: 1) control (without Si), 2) Si (drench), and 3) Si (leaf). To assess preference regarding leaf consumption, a total of 3 treatments and 20 replicates were used in a randomized block design. Twelve second instar larvae were released in center of Petri dishes and at 24, 48, and 72 h of infestation larvae were assessed for each treatment, and at 72 h leaf area consumed was also determined. To assess mortality a total of 3 treatments and 20 replicates were used in a completely randomized design with a release of 12 second instar larvae per Petri dish. After 24, 48, and 72 h larval survival were determined. Through results obtained, it is concluded that silicon application affects feeding preference as well as S. frugiperda larval survival in rice crop.

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Consumo foliar de cultivares de arroz irrigado por Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Cited by 6 publications

References 2 publications

Induction of resistance of corn plants to Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) by application of silicon and gibberellic acid

Induction of resistance of corn plants to Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) by application of silicon and gibberellic acid

Biologia de Spodoptera eridania (Cramer) (Lepidoptera: Noctuidae) em diferentes hospedeiros

Não preferência a Spodoptera frugiperda (Lepidoptera: Noctuidae) induzida em arroz pela aplicação de silício

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