International Journal of Acarology (2013) 39, 285-289

Marziyeh Amizadeh, Mir Jalil Hejazi and Ghasem Askari Saryazdi (2013)
Fumigant toxicity of some essential oils on Tetranychus urticae (Acari: Tetranychidae)
International Journal of Acarology 39 (4), 285-289
Abstract: Tetranychus urticae Koch (Acari: Tetranychidae) is an economically important pest of agricultural and ornamental crops worldwide. It has been shown that many of natural plant-based pesticides have fewer side effects compared with synthetic chemicals. This study was aimed at assessing the fumigant toxicity of five essential oils to eggs and adult females of T. urticae. Essential oils were extracted from leaves and fruits of Eucalyptus microtheca F. Muell., leaves of Satureja sahendica Bornm., fruits of Heracleum persicum Desf. and seeds of Foeniculum vulgare Mill. The experiments were done using bean leaf discs through filter paper diffusion bioassay without allowing direct contact in 4 l plastic containers. The study was conducted in laboratory at 26 ± 2°C, 50 ± 10% RH and 16: 8 (L: D) h photoperiod. Exposure times for the adults and eggs were 24 and 72 h, respectively. LC₅₀ values for the adult females were 1.52, 5.70, 0.98, 3.15 and 5.75 μl/l for E. microtheca leaves, E. microtheca fruits, S. sahendica, H. persicum and F. vulgare, respectively. For these oils, LC₅₀ values for eggs were 0.56, 2.36, 0.54, 1.53 and 1.17 μl/l, respectively. The data suggest that essential oils of E. microtheca and S. sahendica leaves have the potential to be used in management of two spotted spider mite in greenhouse conditions provided that they produce similar results in whole plant experiments as well.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Mir Jalil Hejazi

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus urticae