Repellence and acute toxicity of a nano-emulsion of sweet orange essential oil toward two major stored grain insect pests

Giunti, Giulia; Palermo, Davide; Laudani, Francesca; Algeri, Giuseppe M.; Campolo, Orlando; Palmeri, Vincenzo

doi:10.1016/j.indcrop.2019.111869

Cited by 71 publications

(30 citation statements)

References 63 publications

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“…Sweet orange essential oil (EO) did not show the insecticidal effect on OSW reported by Guario et al . 43 ; however, the reduced number of adults landing on the treated plants and the impairment of oviposition, possibly associated to the synergistic action of limonene with other compounds, are consistent with the EO repellent effect reported for other insects 34 , 55 – 58 . Nonetheless, EO had no effect on the probing behavior that did not diverge from that displayed by the whitefly on untreated plants.…”

Section: Discussionsupporting

confidence: 77%

Behavioral effects induced by organic insecticides can be exploited for a sustainable control of the Orange Spiny Whitefly Aleurocanthus spiniferus

Mokrane

Cavallo

Tortorici

et al. 2020

Sci Rep

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The Orange Spiny Whitefly (OSW) Aleurocanthus spiniferus (Hemiptera: Aleyrodidae) represents a new serious threat to Citrus spp., grapevine and ornamental plants in the whole Mediterranean area. Such threat urgently calls for the development of a sustainable control strategy, including insecticides compatible with biological control, and applicable also in organic citrus farming that represent an essential part of Mediterranean agricultural economy. Therefore, we evaluated the toxicity and the effects on host searching, oviposition, and probing and feeding behavior exerted on OSW by organic insecticides supposed to have limited side effects on environment and ecosystem services, i.e. sweet orange essential oil (EO), extract of Clitoria ternatea (CT), mineral oil, pyrethrin and azadirachtin. Despite none of the compounds caused a significant mortality of any of the OSW instars, we observed interesting effects on whitefly behavior: (i) EO and pyrethrin showed a relevant repellent effect, with impairment of both adults landing and oviposition on treated plants; (ii) CT and pyrethrin strongly affected probing behavior. Here, in the light of our findings, we discuss possible OSW sustainable control strategies and further research perspectives.

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Section: Discussionsupporting

confidence: 77%

Behavioral effects induced by organic insecticides can be exploited for a sustainable control of the Orange Spiny Whitefly Aleurocanthus spiniferus

Mokrane

Cavallo

Tortorici

et al. 2020

Sci Rep

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“…The EO-based nano-emulsions were prepared following the method described by Giunti et al [34]. Briefly, when a hydrophobic and an aqueous phase are mixed, a spontaneous emulsification process occurs, producing the coarse nano-emulsions.…”

Section: Nano-emulsion Formulation and Characterizationmentioning

confidence: 99%

“…The repellent activity of EO-based gels was evaluated in area-preference bioassays [34]. Tested insects were placed inside a rectangular plexiglass box (length × width: 26.6 cm × 15.6 cm, height: 4.5 cm), whose bottoms were covered with filter paper (Whatman n • 1), to facilitate T. confusum locomotion.…”

Section: Repellent Activity Of Eo Based Gelsmentioning

confidence: 99%

Essential Oil-Based Nano-Biopesticides: Formulation and Bioactivity against the Confused Flour Beetle Tribolium confusum

et al. 2021

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Post-harvest pest control can rely on few approved pesticides and tools; hence, there is a rising interest in new sustainable, eco-friendly approaches. In this study, eight commercial essential oils (EOs) (anise Pimpinella anisum, artemisia Artemisia vulgaris, fennel Foenicum vulgare, garlic Allium sativum, lavender Lavandula angustifolia, mint Mentha piperita, rosemary Rosmarinus officinalis, and sage Salvia officinalis) were selected for their bioactivity and commercial availability, and then formulated in nano-emulsions. Repellency and acute toxicity of the developed nano-formulations were tested against a key stored product pest, Tribolium confusum (Coleoptera: Tenebrionidae). All the developed nano-emulsions presented optimal physical characteristics (droplet dimension = 95.01–144.30 nm; PDI = 0.146–0.248). All the formulations were repellent over time tested against adult beetles, in area preference bioassays. The best repellent was the anise EO-based formulation (RC50 = 0.033 mg). Mortality values from cold aerosol trials showed that the majority of tested EOs caused immediate acute toxicity, and garlic EO nano-emulsion caused the highest mortality of T. confusum adults (LC50 = 0.486 mg/L of air). EO-based nano-insecticides, used as cold aerosol and gel, are promising control methods against stored product pests, which can be integrated and combined with other sustainable biorational approaches.

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“…It is well known that tenebrionids can develop resistance to several insecticides [ 12 , 13 , 14 ]. Therefore, new insecticidal formulations are necessary to be developed [ 15 , 16 , 17 , 18 ]. Among natural products with efficacy against stored-product insects, essential oils (EOs) and their main constituents have been revealed to be promising [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Developing a Hazomalania voyronii Essential Oil Nanoemulsion for the Eco-Friendly Management of Tribolium confusum, Tribolium castaneum and Tenebrio molitor Larvae and Adults on Stored Wheat

et al. 2021

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Most insecticides commonly used in storage facilities are synthetic, an issue that generates concerns about food safety and public health. Therefore, the development of eco-friendly pest management tools is urgently needed. In the present study, a 6% (w/w) Hazomalania voyronii essential oil-based nanoemulsion (HvNE) was developed and evaluated for managing Tribolium confusum, T. castaneum, and Tenebrio molitor, as an eco-friendly wheat protectant. Larval and adult mortality was evaluated after 4, 8, and 16 h, and 1, 2, 3, 4, 5, 6, and 7 days, testing two HvNE concentrations (500 ppm and 1000 ppm). T. confusum and T. castaneum adults and T. molitor larvae were tolerant to both concentrations of the HvNE, reaching 13.0%, 18.7%, and 10.3% mortality, respectively, at 1000 ppm after 7 days of exposure. However, testing HvNE at 1000 ppm, the mortality of T. confusum and T. castaneum larvae and T. molitor adults 7 days post-exposure reached 92.1%, 97.4%, and 100.0%, respectively. Overall, the HvNE can be considered as an effective adulticide or larvicide, depending on the target species. Our results highlight the potential of H. voyronii essential oil for developing green nanoinsecticides to be used in real-world conditions against key stored-product pests.

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Repellence and acute toxicity of a nano-emulsion of sweet orange essential oil toward two major stored grain insect pests

Cited by 71 publications

References 63 publications

Behavioral effects induced by organic insecticides can be exploited for a sustainable control of the Orange Spiny Whitefly Aleurocanthus spiniferus

Behavioral effects induced by organic insecticides can be exploited for a sustainable control of the Orange Spiny Whitefly Aleurocanthus spiniferus

Essential Oil-Based Nano-Biopesticides: Formulation and Bioactivity against the Confused Flour Beetle Tribolium confusum

Developing a Hazomalania voyronii Essential Oil Nanoemulsion for the Eco-Friendly Management of Tribolium confusum, Tribolium castaneum and Tenebrio molitor Larvae and Adults on Stored Wheat

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