Investigation of formulation preparation of two plant extracts and determination of the effectiveness on Tetranycus urticae koch. (Arachnida: tetranychidae)

Abstract

In this study fruits extracts of Melia azederach L. (Meliaceae) and Allium sativum L. (Amarylliaceae) were prepared and formulation studies of these extracts were carried out with several inert ingredients. The quality tests of these extracts were performed. According to the results of these tests, preparations, which were found successfully, were separated/chosen for effectiveness studies on Tetranycus urticae Koch. The acaricidal effect of the formulations/preparates were carried out on T. urticae by using leaf dipping method under laboratory conditions. Effects of prepared formulations at three different concentrations (5, 7, 10 ml/L) were determined on T. urticae. According to the results of laboratory studies, the highest dose found to be effective and theirs two upper doses (10, 15, 20 ml/L) were taken to examine effect on mites at the greenhouse conditions. Each plot consists of 10 plants. When the density of mite population 1-3 live individual/leaf, the plants were sprayed. Counts were carried out before application of formulations and after application 1, 3 and 7 days. Neem Azal T/S was applied as standard in greenhouse trials. The highest effect was at the highest dose of extract of M. azedarach (88.42%). Similar results were obtained in greenhouse trials.