International Journal of Entomology Research

International Journal of Entomology Research


International Journal of Entomology Research
International Journal of Entomology Research
Vol. 6, Issue 3 (2021)

Efficacy of a saponin extract derived from quinoa on Aphis craccivora (Hemiptera: Aphididae) and Chrysoperla carnea (Neuroptera: Chrysopidae) under laboratory conditions


Ahmed H El Kenawy, Mervat A El-Genaidy, Sayed S Eisa

Recently, Quinoa saponin is widely thought to play a role in insect herbivore defense. Four concentrations were tested on "Aphis craccivora and Chrysoperla carnea to determine the insecticidal activity of Quinoa-derived extracts. According to the results, the extract had the highest toxicity (LC50 36.6 ppm) against Aphis craccivora adults indirect spray method than leaf dipping method (LC50 34.6 ppm), accompanied by (LC50 35.2 ppm) against nymph indirect spray method than (LC50 32.2 ppm) in leaf dipping method. In the leaf dipping process, the maximum mortality was obtained after 72 hours of exposure to the saponin extract at a concentration of 66 ppm, causing 76 ± 0.2% and 72±0.2% for nymphs and adults respectively. However, at a concentration of 66 ppm in the saponin extract, the maximum mortality was recorded after 72 hours, resulting in 88 ± 0.2% and 88 ± 0.2% for nymphs and adults, respectively. After 48 hours of use, the extract had the highest toxicity (LC50 233.5 ppm) against Chrysoperla carnea adults in the Residual touch system than after 24 hours (LC50 156.3 ppm), followed by in a direct spray method, (LC50 96.3 ppm) was used against larvae. Results demonstrated that the 66.2 ppm concentration shows significant differences (P< 0.05) with the control group and 20.0 ppm group, but After 48 hours on Ch. Carnea, 66.2 ppm group shows significant differences (P< 0.05) with control group and 20.0 ppm group. On the other hand, the differences between 40.0, 33.2 and 20.0 ppm groups are not significant (P> 0.05) with the control group. In direct spray method assays, the maximum larvae mortality was recorded in the higher dose (66.4 ppm) at 24 and 48 h (9.1±0.7 and 13.6±1.2%), respectively. While after 4 days of applying, the extract there is no evidence of dead insects in all concentrations. Furthermore, the findings obtained under laboratory conditions must be validated at open and industry-related scales and test priorities for many primary pests and natural enemy species, thereby assisting in implementing IPM practices and reducing the reliance on broad-spectral pesticides.
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How to cite this article:
Ahmed H El Kenawy, Mervat A El-Genaidy, Sayed S Eisa. Efficacy of a saponin extract derived from quinoa on Aphis craccivora (Hemiptera: Aphididae) and Chrysoperla carnea (Neuroptera: Chrysopidae) under laboratory conditions. International Journal of Entomology Research, Volume 6, Issue 3, 2021, Pages 54-60
International Journal of Entomology Research International Journal of Entomology Research