Field Application of Brassicaceous Amendments for the Control of Root Knot Nematode (Meloidogyne incognita) on Cucumber

Biofumigation with brassicaceous green manures for controlling root-knot nematode (Meloidogyne incognita) on cucumber was evaluated under field conditions during two subsequent growing seasons. Cauliflower residues were incorporated into the soil two weeks before planting cucumber at rates of 15, 20 and 5 kg/plot ( 15 m2 ) while both cauliflower and cabbage residues were incorporated at rates of 25 kg /plot in the second season. Cauliflower and cabbage residues at rates of 25 kg /plot significantly reduced disease severity expressed as reduction in the percentage of root galling to 15% and around 19% compared to 48% and 54% in the controls in the first and second seasons, respectively and significantly increased cucumber yield to 121 and 116 kg/plot, respectively compared to 92 kg/ plot in the control in the second season. The field application of cauliflower and cabbage green manures has effectively controlled the root-knot nematode disease and increased the yield of cucumber