Effect of some plant extracts on root-knot nematode (Meliodogyne spp)‎ associated with cucmber

Abstract EN

An experiment was conducted to test the nematicidal activity of different concentrations of the aqueous extracts of marigold (Tagetes spp.

) and garlic (Allium sativum).

Cucumber plants were grown in pots in 2018 in a greenhouse at the University of Sulaimani–College of Agricultural Sciences Engineering.

Plant extract concentrations of 0, 10%, 20%, and 30% were prepared in1 liter of hot water.

The extracts were applied to soil infested with nematodes which was brought fromYaranbag.

The results showed that garlic recorded maximum shoot length (8.

18 cm and 7.

80 cm) when concentrations of 30% and 20% were used.

The maximum root length (3.

67 cm) was recorded with concentration 30 of garlic.

Moreover, maximum number of leaves (7.

33 cm) was recorded when 30% of garlic extract was applied.

The significantly minimum numbers of galls/ plant (0.

33 cm) were recorded when 30% of garlic was used.

These results suggest that the application of marigold and garlic extracts would be a good alternative to manage root-knot nematode populations.