The root-knot nematode, Meloidogyne incognita, causes a high damage and yield decrease for many economic plants. The need for non-systemic effective new approaches and environmentally friendly methods for controlling the nematodes has directed research to some new and safe agrochemicals found in medicinal plants as new viable management options. In laboratory experiments, solidago and periwinkle aqueous and ethanolic extracts achieved high J2 mortality (%) concerning different dilutions; however, aqueous extracts were more effective for mortality than ethanolic extracts. Also, there was a direct relationship between the nematicidal activity of these extracts with both concentration and time of application. Inhibition of egg hatching by Periwinkle extracts was higher than that of solidago. Moreover, the nematicidal activity of tested extracts against J2 decreased significantly with prolonged storage time at + 5 °C, while did not with stored frozen at – 5 °C for 12 months. Periwinkle and solidago extracts killed the non-target organisms, i.e., rotifers and free-living nematodes. Seventy-five and 90% of total phytochemicals recovered from periwinkle and solidago, respectively were nematostatic or nematicidal to nematode viability, egg hatch in vitro, and development and reproduction in vivo despite the method of application (foliar and soil drench). The antagonistic effects of solidago were more pronounced in soil drench than periwinkle concerning their concentrations and methods of application. Solidago and periwinkle plant extracts showed important sources of effective control phytochemicals against M. incognita.

中文翻译：

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在实验室中筛选本地药用植物提取物针对隐线虫的杀线虫潜力。和温室条件

根结线虫Meloidogyne incognita对许多经济植物造成了很高的破坏，产量下降。对非系统有效的新方法和控制线虫的环境友好方法的需求已将研究定向到药用植物中发现的一些新的安全农用化学品，作为新的可行管理选择。在实验室实验中，关于不同稀释度，一枝黄花和长春花水和乙醇提取物的J2死亡率很高（％）。然而，水提取物比乙醇提取物对死亡率更有效。而且，这些提取物的杀线虫活性与浓度和施用时间之间有直接关系。长春花提取物对卵孵化的抑制作用比银杏高。而且，在+ 5°C下延长储存时间后，测试提取物对J2的杀线虫活性显着降低，而在– 5°C下冷冻保存12个月则没有。长春和杜鹃花提取物杀死了非目标生物，即轮虫和自由生活的线虫。尽管使用了施用方法（叶面和土壤淋湿），但从长春花和白花果中回收的总植物化学物质中，有75％和90％的杀线虫剂或杀线虫剂具有杀线虫活性，体外卵孵化以及体内发育和繁殖。就其浓度和施用方法而言，在土壤湿润中，一枝黄花的拮抗作用比长春花更明显。一枝黄花和长春花植物提取物显示出有效的防治隐身梭状芽孢杆菌的重要化学植物来源。