Tetranychus urticae Koch (Acari: Tetranychidae) is one of the key pests causing economic losses in vegetable fields. Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae) is used effectively in the biological control of this mite on many vegetable crops. The present study determined how different crops such as pepper, eggplant, cucumber and tomato affected the biological control of T. urticae when using P. persimilis in the field-grown vegetables in the Çanakkale of northwestern part of Turkey in 2016 and 2017. Predatory and prey mites were released at a ratio of 1:10 predator:prey on host plants and their numbers on leaves were counted weekly for a period of 8 weeks. The highest number of T. urticae and P. persimilis were counted on cucumber with 108.70 ± 8.14 and 81.00 ± 6.00 mites per leaf in 2016, and with 113.30 ± 10.95 and 24.00 ± 4.58 mites per leaf in 2017, respectively. Also, there was a significant difference for both the populations of T. urticae and P. persimilis on the crops on all weeks in both years. It was revealed that P. persimilis markedly suppressed T. urticae on eggplant and tomato compared to pepper and cucumber in both years. It is clear that the host crops is a key factor on the success of P. persimilis on the biological control of T. urticae on field-grown vegetables. Consequently, it is thought that these results should be taken into account in the biological control strategies of mite pests by using the predatory mites on field-grown vegetables.

Tetranychus urticae Koch (Acari: Tetranychidae)是造成菜地经济损失的主要害虫之一。Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae) 有效地用于对许多蔬菜作物的这种螨虫进行生物防治。本研究确定了2016 年和 2017 年在土耳其西北部恰纳卡莱的大田种植蔬菜中使用P. persimilis时，辣椒、茄子、黄瓜和番茄等不同作物如何影响T. urticae的生物防治。 掠食性和捕食螨以 1:10 捕食者：寄主植物上的猎物的比例释放，并且每周计算它们在叶子上的数量，持续 8 周。T. urticae数量最多和P. persimilis在黄瓜上计数，2016 年每片叶子有 108.70 ± 8.14 和 81.00 ± 6.00 螨虫，2017 年每片叶子分别有 113.30 ± 10.95 和 24.00 ± 4.58 螨虫。此外，两年中所有周的作物上的T. urticae和P. persimilis种群都存在显着差异。结果表明，与辣椒和黄瓜相比， P. persimilis在茄子和番茄上显着抑制了荨麻疹。可见，寄主作物是P. persimilis成功生物防治荨麻疹的关键因素。关于田间种植的蔬菜。因此，认为在利用田间蔬菜上的捕食性螨虫防治螨虫害虫的生物防治策略中应考虑这些结果。