Toxicological and Histological Evaluation of Insecticides and Essential oils in Nano emulsion and formulated Form against Spodoptera littoralis

Shaker, N.; Mesbah, H. A.; Ismail, Seham; Wahba, Trandil F.; El-Sabrout, Ahmed M.; Ghabyous, Soheir

doi:10.21608/jalexu.2022.159519.1079

Cited by 2 publications

(2 citation statements)

References 19 publications

(20 reference statements)

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“…This was consistent with the findings of (Heydari et al 2020;Barzegar et al 2018). However, the smallest size of the NE formulation of PNE obtained by (Shaker et al 2022) was about 66 nm, and the ENE obtained by (Mohammadi et al 2020) was about 103.9 nm, which is like the present research. Smaller particle size improves the NE penetration through the insect cuticle and plays a critical role in insecticidal activity.…”

Section: Discussionsupporting

confidence: 93%

Field effectiveness of some essential oil emulsions against the whitefly Bemisia tabaci (GENN.) that infest potato plants in Egypt

Wahba,

Abd-Elatef,

Wahba

2024

J Plant Dis Prot

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Whitefly, Bemisia tabaci, nymphs and sucking sap adults, is one of the most damaging pests of potato, Solanum tuberosum. Excessive use of pesticides causes environmental pollution and the death of beneficial insects, so it is necessary to search for safer controlling alternatives. An experiment was carried out during seasons 2020–2021 and 2021–2022, under field conditions in Egypt. The objective of this study was to identify the main constituent compounds of peppermint and eucalyptus essential oils prepare coarse emulsion (CE) and nanoemulsion (NE) of both peppermint and eucalyptus essential oils and evaluate their efficiency against the whitefly, B. tabaci, in potato cultivars and the effect of these emulsions on the chemical components of potato leaves. The results revealed that the toxicity of the emulsions decreased with increasing time after spraying. The second spray which took place at a 10-day interval was more effective than the first spray. During the season of 2021, three days following the second spray, the tested emulsions' toxicity was highly effective. The reduction percentages of nymph for peppermint coarse emulsion (PCE), peppermint nanoemulsion (PNE), eucalyptus coarse emulsion (ECE), eucalyptus nanoemulsion (ENE) and imidacloprid were 82.64, 84.14, 73.26, 72.72 and 89.03, but they were 78.58, 83.27, 77.85, 69.97 and 89.26 compared with 2022. A moderately positive correlation was identified between temperature, specific humidity, wind speed and the effectiveness of the emulsions. This indicates that higher levels of temperature, humidity and wind speed were associated with increased efficacy of the emulsions. The study of the phytochemicals (total soluble protein, total carbohydrate, total phenolic contents and peroxidase activity). PCE and ECE achieved a slight decrease in protein levels. Also, ECE increased total plant carbohydrates. All treatments did not affect the phenolic compounds of potato leaf plants except ENE, which caused an increase in phenolic compounds. All treatments decreased the nitrogen plants' contents, while PCE, PNE, and ENE increased the potassium content. All treatments increase the activity of peroxidase (POX) compared with untreated plants. The formulations PNE and ENE might be an interesting alternative for integrated pest management of B. tabaci nymphs.

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Section: Discussionsupporting

confidence: 93%

Field effectiveness of some essential oil emulsions against the whitefly Bemisia tabaci (GENN.) that infest potato plants in Egypt

Wahba,

Abd-Elatef,

Wahba

2024

J Plant Dis Prot

View full text Add to dashboard Cite

show abstract

“…This was consistent with the ndings of (Heydari et al 2020; Barzegar et al 2018). However, the smallest size of the NE formulation of PNE obtained by (Shaker et al 2022) was about 66 nm, and ENE obtained by (Mohammadi et al 2020) was about 103.9 nm, which is like the present research. Smaller particle size improves the NE penetration through the insect cuticle and plays a critical role in insecticidal activity.…”

Section: Discussionsupporting

confidence: 87%

Efficiency of essential oils emulsions against Whitefly Bemisia tabaci (GENN.) infesting potato plants under field conditions In Egypt

Wahba

Wahba²,

Abd-Elatef³

2023

Preprint

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The whitefly, Bemisia tabaci, nymphs, and adults sucking sap Excessive use of pesticides caused pollution of the environment and the death of beneficial insects, it is one of the most damaging pests of Potato, Solanum tuberosum, so it was necessary to search for more safe alternatives. An experiment was carried out during seasons 2021 and 2022 under field conditions in Egypt. The objective of this study aimed to use peppermint and eucalyptus essential oils and prepare coarse emulsions and nanoemulsions (CE and NE) of both peppermint and eucalyptus essential oils. The results reported that the numbers of nymphs per plant before treatment during season 2022 were greater than those in season 2021, which may be due to increasing temperature and decreasing precipitation, specific humidity, and wind speed. On the other hand, essential oil's nanoemulsion (NE) was more effective in controlling B. tabaci. Generally, the toxicity decreased with time after spraying. The second spray was more effective than the first spray. P (CE, NE) revealed the most effectiveness, followed by E (CE, NE) during both seasons. During season 2021, the NEs were slightly more effective than the CEs. During season 2022, recorded no significant difference between CEs and NEs. Also, the toxicity of the tested emulsions was highly effective during season 2021 compared with 2022 due to decreasing temperatures in December 2021 compared to December 2022. The study of the growth component deduced that the parameters of potato plants after being treated with tested emulsions showed that both peppermint coarse emulsion PCE and eucalyptus coarse emulsion ECE achieved slightly decreased portion levels. ECE increased total plant carbohydrates. However, our treatments did not affect the phenolic compounds of potato leaf plants, although ENE caused an increase in phenolic compounds. All treatments decreased the nitrogen plants' contents. Furthermore, PCE, PNE, and ENE increase the potassium content. All treatments increase the activity of peroxidase (POX) compared with untreated plants. The formulation obtained here might be an interesting alternative for integrated pest management of B. tabaci nymphs.

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Toxicological and Histological Evaluation of Insecticides and Essential oils in Nano emulsion and formulated Form against Spodoptera littoralis

Cited by 2 publications

References 19 publications

Field effectiveness of some essential oil emulsions against the whitefly Bemisia tabaci (GENN.) that infest potato plants in Egypt

Field effectiveness of some essential oil emulsions against the whitefly Bemisia tabaci (GENN.) that infest potato plants in Egypt

Efficiency of essential oils emulsions against Whitefly Bemisia tabaci (GENN.) infesting potato plants under field conditions In Egypt

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