Sublethal effects of spinosad and emamectin benzoate on larval development and reproductive activities of the cabbage moth, Mamestra brassicae L. (Lepidoptera: Noctuidae)

Moustafa, Mohamed; Kákai, Ágnes; Awad, Mona; Fónagy, Adrien

doi:10.1016/j.cropro.2016.09.004

Cited by 22 publications

(35 citation statements)

References 38 publications

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“…Both bioinsecticides, Bt or spinosad (tracer) insecticides, showed a high efficacy in controlling larvae of T. absoluta (Hamdy et al 2013;Khidr et al 2013 andHashemitassuji et al 2014). Obtained results were in agreement with (Moustafa et al 2016) who demonstrated the effect of emamectin benzoate and spinosad on cabbage moth, Mamestra brassicae larvae, and found a significant increase in larval and pupal durations than control with a significant decrease in adult emergency percentage than control. .67 b ± 0.33 15.00 a ± 0.58 1.00 c ± 0.00 14.00 a ± 0.00 1.67 a ± 0.33 Indoxacarb) 86.00 bc ± 1.0 54.44 bcd ± 1.0 36.89 cd ± 5.35 16.67 b ± 0.33 15 a ± 0.58 1.00 c ± 0.00 14.00 a ± 0.00 1.67 a ± 0.33 Fig.…”

Section: Latent Effect On Fecundity and Fertilitysupporting

confidence: 69%

Lethal and sub-lethal effects of bio-and chemical insecticides on the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)

Kandil

Abdel-kerim

Moustafa

2020

Egypt J Biol Pest Control

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The tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), is a destructive pest affecting the tomato crop causing a loss of 60-100% of the tomato crop production. In the present study, the lethal and sub-lethal effects of Bacillus thuringiensis (Bt), spinosad, and emamectin benzoate as bio-insecticides comparing with 2 synthetic insecticides: chlorpyrifos and indoxacarb against T. absoluta under laboratory conditions were evaluated. Take in consideration, life tables and reproductive parameters of treated larvae with LC 30 for each pesticide (bioand chemical insecticides) by using leaf dipping technique were calculated. The results showed that Lepinox formulation of Bt was the most effective one against the early 2nd instar larvae with 0.01 × 10 −2 mg/l (ppm), followed by spinosad with 0.07 × 10 −2 ppm comparing to indoxacarb and chlorpyrifos (0.01 and 11.44 μg/ml, respectively). Sub-lethal effect of the Bt formulations significantly increased pupal mortality by 29.77, 33.30, and 26.94% for Lepinox, Dipel 2×, and Protecto, respectively. In addition to their efficiency, Bt formulations and emamectin benzoate increased larval developmental period and reduced adult emergency percentage to 70.28, 66.70, 73.06, and 75.55% for Lepinox, Dipel 2×, Protecto, and emamectin benzoate, respectively. All bio-insecticides including Bt, spinosad, and emamectin benzoate caused abnormalities in different life stages. The results suggest these bio-insecticides are promising alternatives to synthetic insecticides for T. absoluta management.

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Section: Latent Effect On Fecundity and Fertilitysupporting

confidence: 69%

Lethal and sub-lethal effects of bio-and chemical insecticides on the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)

Kandil

Abdel-kerim

Moustafa

2020

Egypt J Biol Pest Control

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“…For the M. brassicae and O. nubilalis samples, a RESTEC (Rxi-5SI) column (0.25 mm internal diameter × 30 m and 0.25 μm film thickness) was used. The GC separation conditions were as described in Moustafa et al [80] for M. brassicae and Fodor et al [32] for O. nubilalis. The selected ion monitoring (SIM) method was used, and calculations were performed with MSD ChemStation ver.…”

Section: Gas Chromatography-mass Spectrometry Analysismentioning

confidence: 99%

Molecular and Functional Characterization of Pyrokinin-Like Peptides in the Western Tarnished Plant Bug Lygus hesperus (Hemiptera: Miridae)

Hull

Brent

Choi

et al. 2021

Insects

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The pyrokinin (PK) family of insect neuropeptides, characterized by C termini consisting of either WFGPRLamide (i.e., PK1) or FXPRLamide (i.e., PK2), are encoded on the capa and pk genes. Although implicated in diverse biological functions, characterization of PKs in hemipteran pests has been largely limited to genomic, transcriptomic, and/or peptidomic datasets. The Lygus hesperus (western tarnished plant bug) PK transcript encodes a prepropeptide predicted to yield three PK2 FXPRLamide-like peptides with C-terminal sequences characterized by FQPRSamide (LyghePKa), FAPRLamide (LyghePKb), and a non-amidated YSPRF. The transcript is expressed throughout L. hesperus development with greatest abundance in adult heads. PRXamide-like immunoreactivity, which recognizes both pk- and capa-derived peptides, is localized to cells in the cerebral ganglia, gnathal ganglia/suboesophageal ganglion, thoracic ganglia, and abdominal ganglia. Immunoreactivity in the abdominal ganglia is largely consistent with capa-derived peptide expression, whereas the atypical fourth pair of immunoreactive cells may reflect pk-based expression. In vitro activation of a PK receptor heterologously expressed in cultured insect cells was only observed in response to LyghePKb, while no effects were observed with LyghePKa. Similarly, in vivo pheromonotropic effects were only observed following LyghePKb injections. Comparison of PK2 prepropeptides from multiple hemipterans suggests mirid-specific diversification of the pk gene.

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“…Several studies have also shown that low concentrations of insecticides may affect the reproductive activity of insects (e.g., Helicoverpa assulta, Mamestra brassica, and S. littoralis [31,68,33].…”

Section: Discussionmentioning

confidence: 99%

“…Groups of 5 females and 7males in 3 replicates [33] were used to calculate the number of eggs and hatching% after the second instar larvae were treated with the LC 15 and LC 50 values of each insecticide and their nano-forms. Deposited eggs were collected and counted on days 2-6 in the mating jars.…”

Section: Studies On Fecundity and Fertilitymentioning

confidence: 99%

Nano-Insecticides Against the Black Cutworm Agrotis ipsilon (Lepidoptera: Noctuidae): Toxicity, Development, Enzyme activity, and DNA Mutagenicity

Awad

Ibrahim

Osman

et al. 2021

Preprint

Self Cite

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High-frequency doses of chemical pesticides cause environmental pollution with high pesticide residues. In addition, increasing insecticide resistance in many insect pests requires novel pest control methods. Nanotechnology could be a promising field of modern agriculture, and is receiving considerable attention in the development of novel nano-agrochemicals, such as nanoinsectticides and nanofertilizers. This study assessed the effects of the lethal and sublethal concentrations of chlorantraniliprole, thiocyclam, and their nano-forms on the development, reproductive activity, oxidative stress enzyme activity, and DNA changes at the molecular level of the polyphagous species of black cutworm Agrotis ipsilon. The results revealed that A. ipsilon larvae were more susceptible to the nano-formsthan the regular forms of both nano chlorine and sulfur within the chlorantraniliprole and thiocyclam insecticides, respectively, with higher toxicities than the regular forms (ca. 3.86, and ca.2.06-fold, respectively). Significant differences in biological parameters, including developmental time and reproductive activity (fecundity and hatchability percent) were also observed. Correspondingly, increases in oxidative stress enzyme activities were observed, as were mutagenic effects on the genomic DNA of A. ipsilon after application of the LC50 of the nano-forms of both insecticides compared to the control. The positive results obtained here have led us to apply these nano-forms indifferent insect models in additional studies.

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Sublethal effects of spinosad and emamectin benzoate on larval development and reproductive activities of the cabbage moth, Mamestra brassicae L. (Lepidoptera: Noctuidae)

Cited by 22 publications

References 38 publications

Lethal and sub-lethal effects of bio-and chemical insecticides on the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)

Lethal and sub-lethal effects of bio-and chemical insecticides on the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)

Molecular and Functional Characterization of Pyrokinin-Like Peptides in the Western Tarnished Plant Bug Lygus hesperus (Hemiptera: Miridae)

Nano-Insecticides Against the Black Cutworm Agrotis ipsilon (Lepidoptera: Noctuidae): Toxicity, Development, Enzyme activity, and DNA Mutagenicity

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