Lethal and sublethal effects of emamectin benzoate on life-table and physiological parameters of citrus red mite, Panonychus citri

Khan, Muhammad Musa; Ali, Muhammad; Hafeez, Muhammad; Fan, Ze-Yun; Ali, Shaukat; Qiu, Bao‐Li

doi:10.1007/s10493-021-00667-7

Cited by 12 publications

(16 citation statements)

References 75 publications

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“…Female fecundity of P. citri was decreased, and the adult pre-oviposition period and total pre-oviposition periodwere increased in the sublethal treatments. The age-stage specific survival rates (S xj ), age-specific fecundity (M x ), net reproductive rate (R 0 ), age-stage specific life expectancy (E xj ), and age-stage reproductive value (V xj ) was reduced by LC 10 and LC 30 exposure ( Khan et al, 2021 ), that of the results were different from this study. The reason need to be further study.…”

Section: Discussioncontrasting

confidence: 97%

“…The survival rate, pupation rate and pupae emergence rate of the F 1 generation were similar to the control, and this could ultimately lead to a presumptive population increase of 13.84%. Sublethal concentration (LC 10 and LC 30 ) exposures of emamectin benzoate had a significant negative impact on the larval, protonymph, and deutonymph developmental periods on Panonychus citri ( Khan et al, 2021 ). Female fecundity of P. citri was decreased, and the adult pre-oviposition period and total pre-oviposition periodwere increased in the sublethal treatments.…”

Section: Discussionmentioning

confidence: 99%

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Sublethal effects and reproductive hormesis of emamectin benzoate on Plutella xylostella

Liu

Guo²,

Zhang³

et al. 2022

Front. Physiol.

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The diamondback moth (DBM), Plutella xylostella L., is an important pest of cruciferous vegetables, and population control mainly depends on chemical pesticides. Emamectin benzoate is a highly effective insecticide used for controlling DBM. However, it is unknown how the sublethal effects of low concentration residues of emamectin benzoate on DBM. So the population development sublethal effects of emamectin benzoate, at LC5, LC10, and LC20 with concentrations of 0.014 mg/L, 0.024 mg/L and 0.047 mg/L, respectively, on adult DBM and their progeny were investigated in this study. The pupal weight, pupal period, female fecundity, and vitellin content of the F0 DBM generation increased significantly compared to the control. And the single female oviposition number of DBM was increased by 20.21% with LC20 treatment. The pupation rate, adult longevity and ovariole length of the treatment groups decreased significantly. The fecundity of DBM in the treatment groups increased, and this increased the population by a presumptive 13.84%. Treatment also led to the shortening of ovarioles and the reduction of egg hatching, and increased pupal weight in the F1 generation. We concluded that the effects of sublethal/low concentration emamectin benzoate on the different life stages of DBM were variable, and the reproductive hormesis on DBM adults were attractive findings.

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Section: Discussioncontrasting

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Sublethal effects and reproductive hormesis of emamectin benzoate on Plutella xylostella

Liu

Guo²,

Zhang³

et al. 2022

Front. Physiol.

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“…Due to its burst release and rapid degradation of EMB under natural sun light, EMB shows a short half-lives (0.37-0.64 days) in the crops [32,34]. However, the residues of EMB might lead to sublethal effects over space and time, including influencing the developmental time, weight, fecundity, longevity and physiological parameters without directly causing death [16,[22][23][24][25]35]. FAW is a highly destructive polyphagous invasive pest that causes substantial losses to agricultural production.…”

Section: Discussionmentioning

confidence: 99%

“…Sublethal concentration of EMB could significantly influence the growth and development of pest [16,22,24,37]. Sublethal concentration exposure (LC 30 ) of EMB could delay the immature stages (larva, protonymph, and deutonymph) of P. citri [35]. The developmental time of Helicoverpa armigera (Hübner) larva and female pupa could be inhibited by the sublethal dose (LC 25 ) of EMB [37].…”

Section: Effect Of Emb On the Performance Of Faw Parental Generationmentioning

confidence: 99%

Sublethal Effects of Emamectin Benzoate on Fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae)

Liu

Tan

et al. 2022

Agriculture

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Fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae), is a highly invasive polyphagous pest that causes great economic losses to agricultural production. Emamectin benzoate (EMB) is one of the most popular biopesticides with high antipest, anti-parasitic and anti-nematode activities and low toxicity. The present study was conducted to determine the lethality of EMB to FAW for 24 h. Sublethal effects of EMB on FAW parental and offspring generations were also assessed. LC10, LC20 and LC50 EMB for 24 h on FAW third instar larvae were 0.0127 mg/L, 0.0589 mg/L, and 0.1062 mg/L, respectively. A low dose of sublethal concentrations of EMB could significantly influence the life cycle of FAW parental and offspring generations. Sublethal concentration (LC20) of EMB significantly prolonged the pupal period of male and increased the pupal weight of male but not of female, and significantly delayed the oviposition period and longevity of adult FAW. In the FAW offspring generation, sublethal concentrations significantly increased the mortality of offspring pupae and pre-adults, and reduced the development time of offspring larvae and pre-adult male and female. Sublethal concentrations (LC10 and LC20) of EMB significantly decreased the FAW oviposition period. However, only LC10 significantly reduced FAW F1 female fecundity. No significant difference was found in the intrinsic rates of natural increase (rm), finite rate of population increase (λ), and net reproductive rate (R0) of FAW offspring exposed to sublethal concentrations. This is the first study to determine the sublethal concentrations of EMB on the life table parameters of two FAW generations. These findings can provide important implications for the rational utilization of FAW insecticides.

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“…It is also reported that Eb can be used to control pathogenic nematodes. [4][5][6] However, due to the conjugated dienes in its structure, it is susceptible to photodegradation under ultraviolet (UV) light irradiation, which greatly limits its application in agricultural production. [7][8][9] Most of the existing formulations of Eb are mainly emulsifiable concentrate (EC) and oil/water emulsions (EW), and they cannot effectively protect Eb, making it vulnerable to degradation due to external environments such as light, microorganisms and acid-base equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of emamectin benzoate nanocapsules based on the dual role of polydopamine

Shi

Yan

Sun

et al. 2022

Pest Management Science

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Background Developing pesticide‐controlled release formulations with foliage adhesion has become the focus of current research in the field of crop protection. In this study, an excellent adhesive nanocapsule loaded with emamectin benzoate (Eb@PDA) was prepared via emulsion interfacial polymerization based on the self‐polymerization ability and adhesion properties of polydopamine (PDA). Results The physicochemical properties of the Eb@PDA were characterized by scanning electron microscopy, transmission electron microscopy, particle size statistics, Fourier transform infrared spectroscopy and X‐ray diffraction. The Eb@PDA presented a regular spherical shape, with an average particle size of 163.8 nm. Compared with conventional formulations, it had higher pesticide‐loading content (34%) and excellent adhesion onto corn leaf. In addition, Eb@PDA showed sustained‐release characteristics, facilitating the release of Eb at low pH and high temperature. Eb@PDA could effectively protect Eb against photodegradation and had a longer effective period for controlling Spodoptera frugiperda and Spodoptera exigua. Furthermore, acute toxicity tests showed that the 50% lethal concentration (LC50) was 80.91 and 57.91 mg kg−1 at 7 and 14 days, respectively, indicating a lower toxicity of the Eb@PDA to earthworms. The cells (L02) treated with Eb@PDA showed a higher cell viability but a lower apoptosis rate (only 5.75%), demonstrating the lower cytotoxicity of the Eb@PDA. Conclusion The self‐prepared Eb@PDA could be used as a formulation with the advantages of slow release, UV shielding, strong leaf adhesion, superior insecticidal properties, sustained effectiveness and biosafety. It will also facilitate the development of an efficient and safe pesticide delivery system. © 2022 Society of Chemical Industry.

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Lethal and sublethal effects of emamectin benzoate on life-table and physiological parameters of citrus red mite, Panonychus citri

Cited by 12 publications

References 75 publications

Sublethal effects and reproductive hormesis of emamectin benzoate on Plutella xylostella

Sublethal effects and reproductive hormesis of emamectin benzoate on Plutella xylostella

Sublethal Effects of Emamectin Benzoate on Fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae)

Preparation and characterization of emamectin benzoate nanocapsules based on the dual role of polydopamine

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