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TURKIYE ENTOMOLOJI DERGISI-TURKISH JOURNAL OF ENTOMOLOGY, vol.41, no.2, pp.243-250, 2017 (SCI-Expanded)
The contact toxicities of extracts of anise (Pimpinella anisum L.), coriander (Coriandrum sativum L.), cumin (Cuminum cyminum L.), dill (Anethum graveolens) and fennel (Foeniculum vulgare Mill.) plants, included in the Apiaceae, prepared with water on different stages of Tetranychus urticae Koch, 1836, were studied. The study was conducted in a laboratory and insect breeding rooms between in 2015-2016. Leaf disc - spray tower method was used for the purpose of determining toxic effects of the plant extracts. The effect of plant extracts on adult and protonymphs stages of T. urticae were determined. Also, the effects of plant extracts were determined on the hatching of T. urticae eggs. Four different concentration of extracts were tested; 1, 3, 6 and 12%. The experiments consisted of one control and four replicates for each concentration. Fifteen individuals were included in each repeat. Dead-live counts were made 1, 3 and 6 days after treatment to determine contact effects of the extracts. It was found that the contact effects of plant extracts on T. urticae adult and protonymphs increased with rising concentration, caused 100% death on T. urticae adults and nymphs at 12% after 6 days. Also, the greatest effect on T. urticae egg hatching was in dill extracts with mortality of over 91%. It is considered that these plant extracts may constitute an alternative acaricides for control T. urticae.