Acaricidal Activity of Essential Oils of Chamomile, Marjoram and Eucalyptus against the Two-Spotted Spider Mite, Tetranychus urticae Koch: Biology and Enzymes
Afify, A., Ali, F., Mohamed, M., Turky, A. (2009). Acaricidal Activity of Essential Oils of Chamomile, Marjoram and Eucalyptus against the Two-Spotted Spider Mite, Tetranychus urticae Koch: Biology and Enzymes. EKB Journal Management System, 3(1), 9-15. doi: 10.21608/ajesa.2009.4960
A. Afify; Fatma Ali; M. Mohamed; A. Turky. "Acaricidal Activity of Essential Oils of Chamomile, Marjoram and Eucalyptus against the Two-Spotted Spider Mite, Tetranychus urticae Koch: Biology and Enzymes". EKB Journal Management System, 3, 1, 2009, 9-15. doi: 10.21608/ajesa.2009.4960
Afify, A., Ali, F., Mohamed, M., Turky, A. (2009). 'Acaricidal Activity of Essential Oils of Chamomile, Marjoram and Eucalyptus against the Two-Spotted Spider Mite, Tetranychus urticae Koch: Biology and Enzymes', EKB Journal Management System, 3(1), pp. 9-15. doi: 10.21608/ajesa.2009.4960
Afify, A., Ali, F., Mohamed, M., Turky, A. Acaricidal Activity of Essential Oils of Chamomile, Marjoram and Eucalyptus against the Two-Spotted Spider Mite, Tetranychus urticae Koch: Biology and Enzymes. EKB Journal Management System, 2009; 3(1): 9-15. doi: 10.21608/ajesa.2009.4960

Acaricidal Activity of Essential Oils of Chamomile, Marjoram and Eucalyptus against the Two-Spotted Spider Mite, Tetranychus urticae Koch: Biology and Enzymes

Acarines: Journal of the Egyptian Society of Acarology
Article 3, Volume 3, Issue 1, January 2009, Page 9-15  XML PDF (146.47 K)
Document Type: Original research articles
DOI: 10.21608/ajesa.2009.4960
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Authors
A. Afify1; Fatma Ali2; M. Mohamed3; A. Turky2
1Biochemistry Dept., Fac. of Agric., Cairo Univ.
2Zoology and Nematology Dept., Fac. of Agric., Cairo Univ.
3Biochemistry Dept., Fac. of Agric., Cairo Univ.,
Abstract
Different concentrations of three essential oil extracts (0.5, 1, 2, 3 and 4%) were used against Tetranychus urticae.
(Koch) Chamomile; Chamomilla recutita (L.), proved to be the most efficient agent against T. urticae followed by
Marjoram; Marjorana hortensis (L.), and Eucalyptus (Eucalyptus sp.) The LC50 values of these oils were 0.651 &1.17;
1, 84 & 6.26 and 2.18 & 7.33 for adults and eggs, respectively. Herein, the bioassay experiments of the two essential
oils, Chamomile and Marjoram showed relationship between essential oil contents and activity of enzyme glutathione
S-transferase, non specific esterase and alkaline phosphatase in T.urticae. GC-MS analysis of C. recutita and M.
hortensis proved the presence of 13 and 14 essential oil components, respectively. The major essential oil contents of C.
recutita are α-Bisabolol oxide A (35.25%), and Trans-β-farersene (7.98%), while the main components of M. hortensis
are Terpinen-4-ol (23.86%), P-cymene (23.40%) and Sabinene (10.90%). The major components of both plant extracts
(Terpinen-4-ol 23.86% and α-Bisabolol oxide A 35.25% essential oils) may be responsible for the activity of enzymes
of T. urticae (glutathione S-transferase, non specific esterase and alkaline phosphatase).
Keywords
Tetranychidae; Plant essential oils; Enzymes; Glutathione S-transferase; Non specific esterase and Alkaline phosphatase
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