Growth disruption, abnormalities and mortality of Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) caused by Azadirachtin

Martinez, Sueli S.; Emden, H. F. van

doi:10.1590/s1519-566x2001000100017

Cited by 132 publications

(90 citation statements)

References 12 publications

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“…Similarly, Bogorni and Vendramim (2003) where neem seed extracts and T. pallens leaves were used. Growth inhibition and poor weight gain can be attributed to reduced feeding and impaired ability to convert nutrients into biomolecules to form the tissues of insects, preventing growth and weight gain (Martinez and Emden, 2001). For Tanzubil and McCaffery (1990), significant weight reduction caused by the extracts indicates that the insects, in need of degrading possible secondary metabolites present in the extracts, can be diverted for this purpose, resources that would be used to gain biomass.…”

Section: Resultsmentioning

confidence: 99%

Bioactivity of ethanolic extracts of Euphorbia pulcherrima on Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Almeida¹,

Ramos²,

Saqueti³

et al. 2017

Afr. J. Biotechnol.

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The fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is a polyphagous species which attacks many economically important crops in several countries. This insect is an important pest of corn, and currently the most widely used control method is chemical. In order to minimize environmental impacts, other forms of control have been tried, and accordingly, the investigation of plants with insecticidal effects becomes relevant. Thus the present study was conducted in order to evaluate the effect of the ethanolic extract of Euphorbia pulcherrima (poinsettia) leaves in fall armyworm biology. Extracts were prepared from leaves of the plant E. pulcherrima collected at different phenological stages (vegetative and reproductive), oven dried, crushed and then solubilized in ethanol, yielding the ethanol extract. The extracts were set aside in 0.5 and 1% concentrations for each phenological stage of the plant, incorporated into an artificial diet and offered to the larvae of S. frugiperda. The extract of vegetative and reproductive phase of E. pulcherrima leaves in concentrations of 0.5 and 1%, has showed that it affected mortality in the larvae, increasing the larval period and reducing the weight of larvae and pupae and viability of the eggs of the caterpillars. Ethanolic extract of E. pulcherrima leaves in the reproductive phase of the plant is effective to reduce the S. frugiperda population.

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Section: Resultsmentioning

confidence: 99%

Bioactivity of ethanolic extracts of Euphorbia pulcherrima on Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Almeida¹,

Ramos²,

Saqueti³

et al. 2017

Afr. J. Biotechnol.

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“…Os efeitos da azadiractina sobre insetos incluem repelência, deterrência alimentar, interrupção do crescimento, interferência na metamorfose, esterilidade e anormalidades anatômicas (Mordue & Nisbet 2000, Martinez & Emden 2001, Ve nzon et al 2007, Santos et al 2004.…”

Section: Palavras-chave: Fungo Entomopatogênico Inseticida Botânicounclassified

“…Os dados de mortalidade média foram analisados mediante análise de variância (ANOVA ), utilizando o Proc ANOVA do SAS (SAS Institute 1999-2001, e as médias comparadas pelo teste de Tukey a 5% de probabilidade quando significativo, sendo os dados transformados para √ (x + 0,5).…”

Section: Seleção De Isoladosunclassified

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Potencial de isolados de Metarhizium anisopliae e Beauveria bassiana e do óleo de Nim no controle do pulgão Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae)

Araujo¹,

Marques²,

Oliveira³

2009

Neotrop. entomol.

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-This work aimed to determine the efficiency of the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana to control the aphid Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae) in kale Brassica oleracea var acephala D.C., as well as their compatibility with a neem oil formulation (Neemseto®). Ten isolates of both fungi were tested and the most pathogenic ones were B. bassiana CG001 and M. anisopliae CG30 with 90% and 4.4 days, and 64% and 3.8 days of mortality and median lethal time, respectively. Bioassays with neem at concentrations of 0.5, 1.0 and 2.0% were done either by leaf discs dipping or spraying the aphids on the leaf discs. The neem spraying treatment at 2.0% provided 90% mortality. The use of B. bassiana isolate CG001 or M. anisopliae isolate CG30 with neem at 0.125, 0.25, and 0.5%, demonstrated that these isolates could have their spore viability or colony growth affected when exposed to neem concentrations higher than 0.25%. In absolute values, the isolates B. bassiana CG001 and M. anisopliae CG30 are the most virulent to L. erysimi, and could be utilized in the management of this pest.KEY WORDS: Entomopathogenic fungi, botanic insecticide, compatibility, crucifer RESUMO -Avaliou-se a eficiência de Metarhizium anisopliae e Beauveria bassiana para o controle do pulgão Lipaphis erysimi (Kalt.) em couve Brassica oleracea L. var. acephala D.C., bem como sua compatibilidade com óleo de nim (Neemseto ® ). Dez isolados desses fungos foram utilizados, onde o isolado CG 001 de B. bassiana e o isolado CG 30 de M. anisopliae apresentaram-se como os mais virulentos com 90% e 4,4 dias, e 64% e 3,8 dias, de mortalidade e tempo letal médio, respectivamente. Bioensaios com o produto à base de nim nas concentrações 0,5; 1,0 e 2,0% foram realizados por imersão foliar e pulverização sobre os pulgões. O tratamento com pulverização de 2,0% de Neemseto ® proporcionou mortalidade de 90%. O teste in vitro de Neemseto ® a 0,125; 0,25 e 0,5%, sobre os isolados CG 001 de B. bassiana e CG 30 de M. anisopliae mostrou que esses isolados podem ter seu crescimento colonial e viabilidade alterados quando expostos a concentrações de nim maiores que 0,25%. Em valores absolutos, os isolados CG 001 de B. bassiana e CG 30 de M. anisopliae foram os mais virulentos para L. erysimi, podendo ser utilizados no manejo dessa praga. PALAVRAS-CHAVE: Fungo entomopatogênico, inseticida botânico, compatibilidade, crucífera A produtividade das brassicáceas pode ser reduzida pela presença de vários insetos, com destaque para os pulgões Brevicoryne brassicae L, Myzus persicae (Sulzer) e Lipaphis erysimi (Kaltenbach) (Sousa-Silva & Ilharco 1995, Blackman & Eastop 2000. As ninfas e os adultos de L. erysimi sugam a seiva das folhas, brotos jovens e inflorescência, resultando até mesmo na morte da planta. Adicionalmente, podem transmitir viroses, como o vírus do mosaico do pepino e do feijoeiro (Castle et al 1992).Atualmente, o controle de pulgões baseia-se no uso de inseticidas químicos sintéticos e produtos alternativos como o alh...

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“…Juss., como alternativa ao controle químico de diversos insetos-praga (MAR-TINEZ, 2002). Dessa espécie tem sido extraída a azadiractina, que possui propriedades inseticidas, afetando diversas espécies de insetos, cujos extratos têm-se revelado tão potentes quanto os inseticidas comerciais (SCHMUTTERER, 1988;SCHMUT-TERER, 1990; MARTINEZ; VAN ENDEM, 2001).…”

Section: Introductionunclassified

Eficiência e efeitos subletais de nim sobre Bonagota salubricola (Meyrick) (Lepidoptera: Tortricidae)

Bernardi¹,

Silva²,

Bernardi³

et al. 2011

Rev. Bras. Frutic.

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RESUMO -O objetivo deste trabalho foi avaliar a eficiência e os efeitos subletais de um inseticida à base de nim (10 g.L -1 de azadiractina A) sobre a lagarta-enroladeira Bonagota salubricola em laboratório. Nos bioensaios, foi utilizado o produto à base de azadiractina NeemAzal-T/S ® nas concentrações de 0,06%; 0,09%; 0,12%; 0,16%; 0,18% e 0,20% do produto comercial (p.c) e uma testemunha (água destilada). A dieta artificial foi cortada em cubos e imersa nas caldas das respectivas concentrações do produto, e, em seguida, lagartas recém-eclodidas foram transferidas para tubos de vidro, contendo os cubos de dieta tratados. Quando a dieta artificial foi tratada com concentração de 0,20% do produto comercial, houve 100% da mortalidade aos 6 dias após a inoculação. Por outro lado, as concentrações de 0,16 e 0,18% prolongaram a fase larval, reduziram a viabilidade de pupas e afetaram negativamente a fecundidade do inseto. Termos de indexação: Azadiractha indica, nim, lagarta-enroladeira. EFFICIENCY AND SUBLETHAL EFFECTS OF NEEM ON Bonagota salubricola (MEYRICK) (LEPIDOPTERA: TORTRICIDAE)ABSTRACT -The objective of this study was to evaluate the efficiency of control and sublethal effects of neem insecticide (10 g.L -1 of azadirachtin A) to the leafroller Bonagota salubricola at laboratory condition. In the bioassays, it was used an azadirachtin based product (NeemAzal-T/S ® ) at concentrations of 0.06%, 0.09%, 0.12%, 0.16%, 0.18% and 0.20% of the commercial product (c.p.) and a control (distilled water). The artificial diet was cut in cubes and immersed in the syrups of the respective product concentrations, soon afterwards recently-emerged caterpillars were transferred to glass tubes, containing the diet cubes treated. When the artificial diet was treated with a concentration of 0.20% of the commercial product, the mortality was 100% at the 6 th day after inoculation. Additionally, concentrations of 0.16% and 0.18% extended the larval stages, reduced pupae viability and negatively affected the fecundity of the insect.

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Growth disruption, abnormalities and mortality of Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) caused by Azadirachtin

Cited by 132 publications

References 12 publications

Bioactivity of ethanolic extracts of Euphorbia pulcherrima on Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Bioactivity of ethanolic extracts of Euphorbia pulcherrima on Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Potencial de isolados de Metarhizium anisopliae e Beauveria bassiana e do óleo de Nim no controle do pulgão Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae)

Eficiência e efeitos subletais de nim sobre Bonagota salubricola (Meyrick) (Lepidoptera: Tortricidae)

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