Toxicity of Some Essential Plant Oils Against Cotton Leaf Worm, Spodoptera littoralis (BOISD.)

M., Shalaby, Marwa,; G., El-Sherif, A.; G., Borham, S.; M., El-Bialy, Fatma,

doi:10.21608/eajbsf.2020.69157

	Toxicity of Some Essential Plant Oils Against Cotton Leaf Worm, Spodoptera littoralis (BOISD.)
Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control
Article 1, Volume 12, Issue 1, June 2020, Page 1-7 PDF (541.39 K)
Document Type: Original Article
DOI: 10.21608/eajbsf.2020.69157
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Authors
Shalaby, Marwa, M.¹; El-Sherif, A. G.²; Borham, S. G.²; El-Bialy, Fatma, M.²
¹Plant Protection Research Institute, Giza, Egypt
²Nematology Research unit, Agric. Zoology Dept. Fac. of Agriculture, Mansoura Univ., Egypt
Abstract
The study aims to evaluate the bioactivity of plant essential oils (neem oil, garlic oil, marjoram oil, and menthol oil) on 2^nd instar larvae of the cotton leafworm, Spodoptera littoralis in the laboratory. Also, LC₅₀ of each treatment was established against 2^nd instar larvae of S. littoralis under semi-field conditions. The obtained results reveal that neem oil was more effective than the other oils followed by, marjoram oil then garlic oil and then, menthol oil.LC₅₀was3022.50, 3803.41, 4630.13and5323.38ppm for neem oil, marjoram oil, garlic oil, and menthol oil, respectively, for 2^nd instar larvae. While, when LC₅₀of these oils applied on the 2^nd instar larvae in the semi-field, the results indicated that, garlic oil was the most effective essential oil followed by, menthol oil, marjoram oil, and neem oil.
Keywords
Spodoptera littoralis; Neem; Garlic; marjoram; menthol; and biological effects


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