Abstract
Two-spotted spider mite, Tetranychus urticae Koch is the major pest of various plants worldwide. Now the control is dependent on the use of chemical pesticides. Plant compounds are recently known as biopesticides. Essential oil of Elettaria cardamomum was researched on repellent and oviposition inhibition of T. urticae. The LC50 values of fumigant toxicity of this oil on adults and eggs of the two spotted spider mite were 7.26 and 8.82 μL/L air, respectively. Also LT50 value of essential oil at 45 μL/L air was 23.86 h and LT50 value of essential oil at 60 μL/L air was 9.01 h. In addition, different concentrations of the essential oil of E. cardamomum significantly affected oviposition deterrence and repellency of adults. The results of this study indicated that essential oil of E. cardamomum may be considered as a biopesticide to control two spotted spider mites.
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