Plant parasitic nematodes (PPNs) are the leading source of damage to crops in agricultural production and they can cause very serious yield reductions. The Tylenchida (Nematoda) constitutes most important group PPNs due containing a large number economically plant species. This study was conducted apple (Pyrus malus L.) walnut (Juglans regia orchards Bingöl (Turkey) between 2016 2017. For this ...