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Journal of Entomological Research
Year : 2015, Volume : 39, Issue : 4
First page : ( 275) Last page : ( 286)
Print ISSN : 0378-9519. Online ISSN : 0974-4576.
Article DOI : 10.5958/0974-4576.2015.00034.1

The effect of some green insecticides from essential oils on Aphis craccivora, and their side effects

Abdel-Aziz Nahed F.*, Abdou Wafaa L., Abdel-Hakim Elham A., El-Hawarya Fatma M., El-Bakry Ahmed M., Sammour Elham A.

Pests & Plant Protection Department, National Research Centre, Dokki-Cairo, Egypt

*Corresponding author's E-mail: nahedmohamed5@hotmail.com

Online published on 2 January, 2016.

Abstract

The current work aims to study the insecticidal effect of some compounds prepared as essential oil formulations (rosacide, sagix and cura) against phloem sucking aphid (Aphis craccivora Koch) treated systematically (soil treatment) or by spray (contact treatment). results revealed that spray treatment was most effective than systemic one, since the cumulative percentage mortality after 7 days were 93.33, 63.33 and 49.98 at 1% concentration for rosacide, sagix and cura respectively. the descending order of toxicity was rosacide > Sagix > cura. Mode of action of the three tested compounds were examined by determination the detoxification enzymes in aphid Glutathione S-transferase (GST) and acetylcholinesterase (AchE). Significantly lower activities of both enzymes than control was found. the side effect of the three tested compounds on the natural enemies Rodolia cardinalis on the aphid was studied. data indicated that rosacide have moderate effect on R. cardinalis larvae followed by (Sagix) and can overcome this effect by choosing the suitable time of application in field when natural enemies with low density. concerning the side effect of the tested compounds on faba bean plants, Antioxidant activities of total phenol contents and GST had been investigated. The results indicated that the treatment induced promising effect on the antioxidant enzymes activity. Also, photosynthetic pigments have been studied. Data showed that there were no significant differences between treatment and control. Moreover, the side effect of the tested compounds on the germination and shoot length of treated bean seeds revealed that, there were no significant differences between the percentage of germination and shoot length when the seeds treated with the tested compounds and control.

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Keywords

Natural compounds, essential oils, Aphis craccivora, natural enemies Rodolia cardinalis, Detoxification enzymes, mode of action, Antioxidant activities, photosynthetic pigments, germination.

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