NEMATICIDAL ACTION OF SOME PLANT EXTRACTS AGAINST MELOIDOGYNE INCOGNITA AND ISOLATION OF NEMATICIDAL FRACTION FROM PLANTAGO LANCEOLATA

摘要

Trials were conducted under laboratory conditions to investigate the nematicidal action of methanol extracts of Sylibum marianum, Plantago lanceolata and Cassia fistula against eggs and second stage juveniles (J_2) of Meloidogyne incognita. Extract ofP. lanceolata was more active against M. incognita than other extracts as it inhibited egg-hatch by 75 % and killed juveniles of the nematode within 5 days. Further studies revealed that butanol fraction of P. lanceolata were more active than other fractions in preventing egg-hatch and killing juveniles of the nematode. Of the group of compounds isolated from butanol fraction of P. lanceolata, the one collected in 5-15 % methanol in chloroform exhibited a stronger nematicidal action against M. incognita than other fractions. The results of this study may be useful in developing new nematicides of plant origin.