Azadirachtin from the neem tree Azadirachta indica: its action against insects

Mordue, A. J.; Nisbet, Alasdair J.

doi:10.1590/s0301-80592000000400001

Cited by 338 publications

(144 citation statements)

References 37 publications

(16 reference statements)

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“…Mordue & Nisbet (2000) reported these effects: increased mortality, occurrence of abnormal and delayed ecdysis, repellence, metamorphosis interference, sterility and anatomic abnormalities, as well as feeding reduction and reduced growth due to direct effects and for secondary reasons (Martinez & Van Emden 2001).…”

Section: Resultsmentioning

confidence: 99%

“…According to Mordue & Nisbet (2000), the physiological effects of azadirachtin occur in two ways: directly on cells and tissue (Nasiruddin & Mordue 1993), and indirectly through the endocrine system. As a direct effect, to azadirachtin is attributed the inhibition of cell division and protein synthesis.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, morphological studies are an important tool when trying to understand the form of action of natural products (Dequech et al 2007). The deleterious physiological effects can be measured by growth reduction and presence of abnormalities (Mordue & Nisbet 2000).…”

Section: Palavras-chave Análise Histológica; Lagarta-do-cartucho; Nimentioning

confidence: 99%

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The effect of sub-lethal doses of Azadirachta indica (Meliaceae) oil on the midgut of Spodoptera frugiperda (Lepidoptera, Noctuidae)

Roel¹,

Dourado

Matias

et al. 2010

Rev. Bras. entomol.

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ABSTRACT. The effect of sub-lethal doses of Azadirachta indica (Meliaceae) oil on the midgut of Spodoptera frugiperda (Lepidoptera, Noctuidae). The fall armyworm, Spodoptera frugiperda, is one of the major field pests for maize production. It is mainly controlled by means of synthetic, and more recently by resistant cultivar of maize expressing Bt toxins. The neem tree, Azadirachta indica, is a plant that can potentially control insects with the advantage of being food and environmental safe. The aim of this study was to assess the effect of neem oil on the development and survival of S. frugiperda caterpillars by assessing histological alterations caused on their midgut. Newly hatched caterpillars were submitted to three neem oil concentrations: 0.006; 0.05; 0.4%, which were added to their artificial diet. Ten 3 rd instar caterpillars, taken from each treatment, were submitted to histological analysis. The alimentary canals from the specimens were fixed in Baker for 12 hours, desiccated and diaphanized in alcohol/xylol (1:1) and xylol. After placing the samples in paraffin, they were sliced in 8 µm sections and stained with hematoxylineosin stain. The neem oil added to the diet of S. frugiperda caused total mortality at dose of 0.4% whilst still in the first instars, prolonged the larval and pupal stages, and reduced the pupal weight. Histo-physiological alterations such as degeneration of the epithelial lining of the midgut and in the peritrophic matrix were found at all concentrations of neem oil.KEYWORDS. Fall armyworm; histological analysis; insecticidal plants; neem. RESUMO. Efeito de doses subletais do óleo de Azadirachta indica (Meliaceae) no mesêntero de Spodoptera frugiperda (J. E. Smith) (Lepidoptera, Noctuidae). A lagarta-do-cartucho, Spodoptera frugiperda, é a mais importante praga da cultura do milho. Esta é usualmente, controlada por inseticidas sintéticos e mais atualmente por meio de variedades resistentes de milho com a toxina Bt. O nim Azadirachta indica é planta com potencial no controle de insetos, que possui as vantagens de segurança alimentar e ambiental. Objetivou-se com este estudo avaliar o efeito do óleo do nim no desenvolvimento e sobrevivência de lagartas de S. frugiperda em decorrência das alterações no mesêntero. As lagartas recém nascidas foram submetidas a três concentrações do óleo de nim: 0,006; 0,05; 0,4%, adicionadas à dieta artificial. Dez lagartas do 3º instar, retiradas de cada tratamento, foram submetidas à análise histológica. O canal alimentar dos indivíduos foi fixado em Baker por 12 horas, desidratado, diafanizado em álcool/xilol (1:1) e xilol. Após a inclusão em parafina, as amostras foram seccionadas em 8 µm e coradas pela técnica de hematoxilina-eosina. Observou-se que o óleo de A. indica adicionado à dieta de S. frugiperda causa: mortalidade total na dosagem 0,4% nos primeiros instares, aumento na duração do período larval e pupal, redução no peso de pupas. Alterações histofisiológicas, como degeneração do epitélio do revestimento do mesêntero, da matriz peritrófi...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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The effect of sub-lethal doses of Azadirachta indica (Meliaceae) oil on the midgut of Spodoptera frugiperda (Lepidoptera, Noctuidae)

Roel¹,

Dourado

Matias

et al. 2010

Rev. Bras. entomol.

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“…Neem (Azadiracta indica) is a plant of Asian origin with well-known insecticidal action causing feeding inhibition, repellency, interference with pest growth and a decrease in fertility and fecundity (MORDUE (LUNTZ) & NISBET, 2000). Neem insecticides are safer than chemical for human health and the environment being less toxic to predatory mites in different crops (SCHLESENER et al, 2013;BERNARDI et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Azadirachtin on Oligonychus yothersi in yerba mate Ilex paraguariensis

et al. 2016

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“…O nim, Azadirachta indica (Meliaceae), tem sido amplamente estudado por seus compostos com ação inseticida e repelente [Saxena 1987, Schmutterer 1990, 1995, Mordue (Luntz) & Nisbet 2000, Martinez 2002. Dentre os muitos componentes ativos isolados dessa Meliaceae, como salanina, meliantrol, gedunina, nimbolina, nimbinem, dacetilsalanina, o tetranortriterpenoide azadiractina é o composto mais ativo biologicamente, e encontra-se no extrato ou óleo das sementes de nim.…”

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Redução da sobrevivência da broca-do-café, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), e do seu ataque aos frutos de café pela pulverização com nim em laboratório

Depieri¹,

Martinez²

2010

Neotrop. entomol.

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-Aqueous solutions of neem oil and aqueous extracts of neem seeds and leaves were sprayed on coffee fruits for laboratory evaluation of their effi ciency in reducing infestation of the coffee borer, Hypothenemus hampei (Ferrari), in multi-choice preference assays in laboratory. Neem oil and extracts reduced infestation of fruits in a dose-dependent manner, acting as a repellent. At 0.5%, 1% and 1.5%, the oil reduced fruit infestation by 30.2%, 42.5% (P > 0.05), and 58.6% (P  0.05), respectively, as compared with the control. Seed extracts at 1%, 2% and 4% (w/v) reduced infestation by 30.9%, 38.3% (P > 0.05) and 70.2% (P  0.05), respectively; seed extracts at 0.15%, 1.5% and 15% (w/v) reduced fruit infestation by 16.5%, 38.5% (P > 0.05) and 56.9% (P  0.05), respectively. Spraying the emulsifi able oil at 1% on coffee fruits and adult borers was compared with spraying on fruits or adults only. Adult-only spraying caused low mortality (P > 0.05) and low reduction on the number of damaged fruits (P > 0.05). Fruit-only spraying signifi cantly reduced insect survival rates and the number of damaged fruits (P  0.05). However, spraying on adults and fruits caused the greatest reduction in adult survival (55.6%; P  0.05) and in fruit infestation (78.7%; P  0.05), probably due to insect mortality and neem oil repellence acting together.

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Azadirachtin from the neem tree Azadirachta indica: its action against insects

Cited by 338 publications

References 37 publications

The effect of sub-lethal doses of Azadirachta indica (Meliaceae) oil on the midgut of Spodoptera frugiperda (Lepidoptera, Noctuidae)

The effect of sub-lethal doses of Azadirachta indica (Meliaceae) oil on the midgut of Spodoptera frugiperda (Lepidoptera, Noctuidae)

Azadirachtin on Oligonychus yothersi in yerba mate Ilex paraguariensis

Redução da sobrevivência da broca-do-café, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), e do seu ataque aos frutos de café pela pulverização com nim em laboratório

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