The nematicidal potential or clove oil, blaCk cumin oil. orange peels all
tooacco (2% nicotine) and yeast extract were evaluated (or controlling the root-knot
nematode. MefOidogyne Incognita and the leni(orm nematode. Rotytencrunus
renilormis in(ec;ing tomato plants ev. 8alady under greenhouse concuions. All the
Healed materials significantly reduced number of galls. immature stages, females.
egg-laying females and total number of nematodes in tomato roots. The highest
Significant reduction was recorded in numbers o( swollen and egg·laying females of R.
reniformis on tomato roots. In most cases, the previous materials were more effective
on ROfy/enchutus reni/ormis than on Melojdogyne incognita. 'Yeast and tobacco
extracts gave the greatest recucnon on numbers of beth species. There \ .•. as a
positive reaction, in most cases, between essential oils, tobacco and yeast extract
treatments and tomato plant gro''I1h.