Dewer, Y., H., E., Kenawy, A. (2012). Fumigant Toxic Action and Repellent Effects of Plant Essential Oils against Two Spotted Spider Mite Tetranychus urticae koch (Acari: Tetranychidae). test, 33(October-December), 254-260. doi: 10.21608/asejaiqjsae.2012.3162
Y. Dewer; Eldoksch H.; A. Kenawy. "Fumigant Toxic Action and Repellent Effects of Plant Essential Oils against Two Spotted Spider Mite Tetranychus urticae koch (Acari: Tetranychidae)". test, 33, October-December, 2012, 254-260. doi: 10.21608/asejaiqjsae.2012.3162
Dewer, Y., H., E., Kenawy, A. (2012). 'Fumigant Toxic Action and Repellent Effects of Plant Essential Oils against Two Spotted Spider Mite Tetranychus urticae koch (Acari: Tetranychidae)', test, 33(October-December), pp. 254-260. doi: 10.21608/asejaiqjsae.2012.3162
Dewer, Y., H., E., Kenawy, A. Fumigant Toxic Action and Repellent Effects of Plant Essential Oils against Two Spotted Spider Mite Tetranychus urticae koch (Acari: Tetranychidae). test, 2012; 33(October-December): 254-260. doi: 10.21608/asejaiqjsae.2012.3162

Fumigant Toxic Action and Repellent Effects of Plant Essential Oils against Two Spotted Spider Mite Tetranychus urticae koch (Acari: Tetranychidae)

Alexandria Science Exchange Journal
Article 6, Volume 33, October-December - Serial Number 4, October 2012, Pages 254-260    PDF (644.33 K)
Document Type: Original Article
DOI: 10.21608/asejaiqjsae.2012.3162
Authors
Y. Dewer; Eldoksch H.; A. Kenawy
Central Agricultural Pesticides Laboratory, Agricultural Research Center, Plant Protection Research Station, P. O. Box 21616 Alexandria, Egypt
Abstract
Three plant essential oils extracted by hydro-distillation from three medicinal plants namely,clove, Eugenia caryophyllata (Myrtaceae),basil, Ocimumbasilicum and peppermint, Menthapiperita (Lamiaceae) were tested for  their fumigant toxic action and repellency effects against adults of the two spotted spider mite, Tetranychusurticae.  A filter paper diffusion bioassay without allowing direct contract and dipping method respectively was used. Responses varied according to oil type and dose.In a petri dish 90x10mm as a test chamber at the high dose 200 µl /L air , clove oil gave 100% mortality after 24h of exposure against adult T.urticaewhereas 87.5 and 85.1% mortality were obtained with basil and peppermint oils respectively. The LC50 values of essential oils of clove, basil, andpeppermint  against adult T. urticae were 32.2, 66.7 and 62.5 µl/L air, respectively. This indicates that the vapors of essential oil of clove exhibited the highest toxic effect on mites whereas basil and peppermintshowed relatively the least toxic action.  Essential oils of clove, basil, and peppermint proven to have repellent effects with ED50s of 1.63, 3.43 and 4.88% respectively.The presentresults show that essential oils of the tested plants have the potential to be used in integrated pest management programs as safer alternative to conventional acaricides to control T.urticae on economic plants in commercial agriculture.
Keywords
keywords: Medicinal plants; Essential oils; Natural acaricides; Tetranychus urticae
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