Potential of neem extracts as natural insecticide against fall armyworm (Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Tulashie, Samuel Kofi; Adjei, Francis; Abraham, John; Addo, Enoch

doi:10.1016/j.cscee.2021.100130

Cited by 33 publications

(17 citation statements)

References 18 publications

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“…Research has shown that neem extract is effective against nearly 200 species of insects some of which are resistant to pesticides or are inherently difficult to control with chemical insecticides [9] . Previous research studies have shown that in India neem bio-pesticides have been effective for controlling pests in stored grains such as rice, wheat, corn, legumes, potato and tomato [10] . On the other hand, neem leaf extract is still used in various parts of the world against pests in different crops and has desirable properties that include: less toxicity, biodegradable, target specific and maintenance of ecological balance [11] .…”

Section: Introductionmentioning

confidence: 99%

Efficacy of neem bio-pesticide and synthetic insecticides against control of fall armyworm (Spodoptera frugiperda) in Maize

Kamunhukamwe¹,

Nzuma²,

Maodzeka³

et al. 2022

J. Entomol. Zool. Stud.

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Fall Armyworm (FAW), Spodoptera frugiperda, is prevalent in Zimbabwe, causing significant damage to maize and yield losses. Three synthetic insecticides (Nemesis, Ecoterex and Lamda-cyhalothrin) belonging to different chemical groups and neem bio-pesticide (Neem Leaf Extract) were tested for their efficacy against FAW under laboratory and field conditions. The aim of the study was to assess the effect of neem bio-pesticide and synthetic insecticides on the population of FAW larvae, level of leaf damage and maize grain yield in comparison with untreated control plants. In laboratory experiment, neem biopesticide and the three synthetic insecticides resulted in significantly higher FAW larval mortality (p < 0.05) at 24, 48 and 72 hours after application of treatments as compared with the untreated plants. Neem bio-pesticide and the synthetic insecticides caused highest percentage of larval mortality (> 90%) at 72 hours after treatment application. In the field, both bio-pesticide and synthetic insecticides resulted in significantly higher efficacy (p < 0.05) against fall armyworm larvae, reduced the level of leaf damage and increased maize grain yield as compared to the untreated control plants. The untreated maize plants were found to be extensively damaged by FAW as compared to those treated with insecticides and neem bio-pesticide. The highest efficacy was recorded on plants treated with Nemesis, followed by Neem Leaf Extract, Ecoterex and lastly Lamda-cyhalothrin, respectively. The neem bio-pesticide and synthetic insecticides which were used in this study showed high efficacy against FAW larvae and can be recommended to be used as components for integrated pest management (IPM) plans for FAW under smallholder farmer conditions in Zimbabwe and the rest of Africa.

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Section: Introductionmentioning

confidence: 99%

Efficacy of neem bio-pesticide and synthetic insecticides against control of fall armyworm (Spodoptera frugiperda) in Maize

Kamunhukamwe¹,

Nzuma²,

Maodzeka³

et al. 2022

J. Entomol. Zool. Stud.

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“…Other insecticides damage the midgut membrane or act on the mitochondrial respiratory electron transport chain (e.g., carbamates) (toxin of Bacillus thuringiensis ) [ 11 ]. Different insecticides, such as emmamectin benzoate [ 12 ] and neem extracts [ 13 ], have been used to control S. frugiperda .…”

Section: Introductionmentioning

confidence: 99%

Lethal, Sub-Lethal and Trans-Generational Effects of Chlorantraniliprole on Biological Parameters, Demographic Traits, and Fitness Costs of Spodoptera frugiperda (Lepidoptera: Noctuidae)

Akhtar

Afzal

Idrees

et al. 2022

Insects

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Fall armyworm [Spodoptera frugiperda (J. E. Smith, 1797)] was first reported in the Americas, then spread to all the continents of the world. Chemical insecticides are frequently employed in managing fall armyworms. These insecticides have various modes of actions and target sites to kill the insects. Chlorantraniliprole is a selective insecticide with a novel mode of action and is used against Lepidopteran, Coleopteran, Isopteran, and Dipteran pests. This study determined chlorantraniliprole's lethal, sub-lethal, and trans-generational effects on two consecutive generations (F0, F1, and F2) of the fall armyworm. Bioassays revealed that chlorantraniliprole exhibited higher toxicity against fall armyworms with a LC50 of 2.781 mg/l after 48 h of exposure. Significant differences were noted in the biological parameters of fall armyworms in all generations. Sub-lethal concentrations of chlorantraniliprole showed prolonged larval and adult durations. The parameters related to the fitness cost in F0 and F1 generations showed non-significant differences. In contrast, the F2 generation showed lower fecundity at lethal (71 eggs/female) and sub-lethal (94 eggs/female) doses of chlorantraniliprole compared to the control (127.5–129.3 eggs/female). Age-stage specific survival rate (Sxj), life expectancy (Exj) and reproductive rate (Vxj) significantly differed among insecticide-treated groups in all generations compared to the control. A comparison of treated and untreated insects over generations indicated substantial differences in demographic parameters such as net reproduction rate (R0), intrinsic rate of increase (r), and mean generation time (T). Several biological and demographic parameters were shown to be negatively impacted by chlorantraniliprole. We conclude that chlorantraniliprole may be utilized to manage fall armyworms with lesser risks.

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“…Growing attention has been given to the development of environmentally friendly insecticides, among which plant-based biopesticides using plant extracts and essential oils have proven to be efficient pest management systems. [1][2][3][4] Azadirachtin-based insecticides are widely used throughout the world in agricultural crops. With broad spectrum and high efficiency, azadirachtin is a tetranortriterpenoid extracted from neem seeds, leaves and flowers from the neem tree (Azadirachta indica A. Juss) (Meliaceae).…”

Section: Introductionmentioning

confidence: 99%

“…Growing attention has been given to the development of environmentally friendly insecticides, among which plant‐based biopesticides using plant extracts and essential oils have proven to be efficient pest management systems 1–4 . Azadirachtin‐based insecticides are widely used throughout the world in agricultural crops.…”

Section: Introductionmentioning

confidence: 99%

Azadirachtin‐based insecticide impairs testis morphology and spermatogenesis of the southern armyworm Spodoptera eridania (Lepidoptera: Noctuidae)

Scudeler

Daquila

Carvalho

et al. 2023

Pest Management Science

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Background: In the search for alternative tools for integrated pest management, azadirachtin, a botanical insecticide, has been used with the most promising activity against Spodoptera spp., but the mechanism of cytotoxicity on reproductive organs remains unclear. Spodoptera eridania (Stoll, 1782) is a polyphagous pest with great economic importance that has become an important target to elucidate the action of azadirachtin on the reproductive organs of insect pests, helping to understand the deleterious effects caused by its exposure. This study evaluated the effects of chronic exposure to azadirachtin on the morphology and ultrastructure of S. eridania larval testes as well as larval development.Results: Azadirachtin exposure (6 or 18 mg a.i. L −1 ) caused a progressive increase in cumulative mortality and reduced gain in body mass after 5 days. Testicular structure indicated a reduction in their size with internal morphological changes such as spermatogonia, spermatogonial, spermatocytes and spermatid cysts in degeneration. The occurrence of cell death in germ and somatic cells was evidenced by the TUNEL technique. Electron microscopy revealed changes in cystic cells, such as cytoplasmic membrane rupture and cytoplasmic vacuolization. Chromatin compaction, changes in the rough endoplasmic reticulum and Golgi complex cisternae were observed in germ cells. Apoptotic bodies occurred between germ cell cysts.Conclusion: Azadirachtin damaged the testes of S. eridania larvae, and these changes compromised spermatogenesis and consequently the development of the reproductive potential of this specimen, making azadirachtin a promising botanical insecticide for application in integrated pest management programs.

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Potential of neem extracts as natural insecticide against fall armyworm (Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Cited by 33 publications

References 18 publications

Efficacy of neem bio-pesticide and synthetic insecticides against control of fall armyworm (Spodoptera frugiperda) in Maize

Efficacy of neem bio-pesticide and synthetic insecticides against control of fall armyworm (Spodoptera frugiperda) in Maize

Lethal, Sub-Lethal and Trans-Generational Effects of Chlorantraniliprole on Biological Parameters, Demographic Traits, and Fitness Costs of Spodoptera frugiperda (Lepidoptera: Noctuidae)

Azadirachtin‐based insecticide impairs testis morphology and spermatogenesis of the southern armyworm Spodoptera eridania (Lepidoptera: Noctuidae)

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