The effects of plant extracts of lemon-scented tea tree [Leptospermum petersonii (Myrtaceae)] on Tetranychus urticae Koch (Acarina: Tetranychidae)
Year: 2019
Type: article
Abstract: The two-spotted spider mite [Tetranychus urticae Koch (Acarina: Tetranychidae)] is a very serious pest worldwide, causing considerable damage to vegetables, flowers and fruit crops.Control is difficult mainly due to mite resistance to conventional acaricides.The application of plant extracts to control insects can be an effective alternative.In this study, the efficacy of extract obtained from Leptospermum petersonii Bailey (Myrtaceae) was tested as an alternative to conventional acaricides.Using two different methods, bioassays were used to determine the effects of varying concentrations (0.1, 0.3, 0.4 and 0.5%) of the extracts.Experiments were carried out using 3cm diameter leaf disks of Phaseolus vulgaris L. In addition, the effects of the extracts on mite reproduction and oviposition were investigated.In the leaf dipping method, the extract at 0.5% concentration caused the highest mortality in the nymph (100%) and adult (100%) stages.In the lowest concentration bioassays, the adult mites laid lower numbers of eggs compared to the untreated control.The highest effect occurred at a concentration of 0.5% while the lowest effect was at 0.1%.No ovicidal effects of the plant extracts were observed.
Author: Pervin Erdogan
Institution: Plant Protection Central Research Institute
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2954499078