利用离体生物测定法比较了13种植物源化合物对南方根结线虫(Meloidogyne incognita Chitwood)的毒力,并探讨了紫外光照射对这些化合物杀虫活性的影响。结果表明,对苯二酚、DL-薄荷醇、丁子香酚和苦豆碱对南方根结线虫的毒杀活性最强,邻苯二酚等6种化合物的毒杀活性次之,野靛碱、毒扁豆碱和间苯二酚的毒力较低。紫外光照射可明显降低苦豆碱和柠檬酸对南方根结线虫的毒杀活性,而其他11种化合物的毒杀活性则基本不受紫外光照射的影响。 

The toxicity of thirteen phytochemicals to Meloidogyne incognita Chitwood was compared by bioassay and the influence of UV radiation on nematicida lactivity of these compounds was also studied. The results showed that the nematicidal activity of hydroquinone, DL-menthol, eugenol and aloperine to M. incognita was the highest, that of pyrocatechol, sophoramine, matrine, phloroglucinol, citrazinicacid and citronellol was the second, while cytisine, physostigmine and resorcinol showed poorly nematicidal activity. The nematicidal toxicity of aloperine and citrazinic acid to the pest was obviously debased with UV radiation, and that of the other phytochemicals was not effected by UV radiation.