Comparative toxicological studies on tomato russet mite (Aculops lycopersici Massee) and predator mite Amblyseius Swirskii Athias-Henriot (Acari: Eriophyidae, Phytoseiidae)

Thesis Type: Postgraduate

Institution Of The Thesis: Bursa Uludağ University, Turkey

Approval Date: 2019

Thesis Language: Turkish

Student: Ayşenur Kolcu



The tomato russet mite [Aculops lycopersici (Massee) (Acari: Eriophyidae)] is an important pest of tomato. For integrated control of the mite, short-harvest pesticides and even botanical and biological active pesticides and biological control agents should be preferred. In this management, the side effects of acaricides recommended for tomato russet mite should be determined for successfully releasing or protecting Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) which is the the effective natural enemy of the mite of tomato russet mites. The aim of this study is to determine the susceptibilty of tomato russet mite against acaricides registrated for other mites, as well as the side effects to A. swirskii. For this purpose, the lethal doses of 16 acaricides against tomato russet mite will be calculated by Probit analysis method using results of residual bioassay. As a result, the most toxic substances are abamectin, milbemectin, pyridaben, azadirachtin and sulphur at lower doses for A. lycopersici. Near to the recommended doses for other mites in Turkey of bifenthrin, fenbutatin oxide, acequinocyl, fenpyroximate, tebufenpyrad, spridomesifen and spirodiclofen showed toxic effect on A. lycopersici. Also, the lethal doses of hexythiazox, etoxazole, bifenazate and Paecilomyces fumosoreus strain PFs-1 were determined in this study. LD99 values calculated for A. lycopersici were tested using residual methods against larvae which are the most sensitive stage of A. swirskii. Additionally, the acute toxic effects and sublethal effects in reproduction on females of the phytoseiid were determined by using the LD99 values. Based on the evaluation method suggested by IOBC, the high doses of etoxazole, fenbutatin oxide, bifenazate, fenproximate, and low doses of pyridaben, sulphur, abamectin and milbemectin were found as slightly toxic (II) to both female and larva of A. swirskii.