Control of nematodes always has to be a multi-angled approach. Start with certified seeds. Practice crop rotation. Ideal are maize or green beans or fallows planted with green manure like Crotolaria or alfalfa. Test the soil for nematode infestation as soon as you see the first signs. Remove infected plants and burn them. Keep high standards of hygiene. Weeding should be done regularly, weeds have to be removed from the field and composted. Physical controls can be prolonged flooding of an area or leaving it to dry out for a season. Post harvest ploughing is recommended. Smaller areas can be sterilized by covering it with a plastic sheet and exposing it to the sun until the temperature in the soil reaches over 50ºC at a depth of 20cm. Soils for seedbeds can also be sterilized with boiling water, or by heating them in large sufurias. Nematodes can be reduced by starving them of food sources by planting the area entirely with Tagetes and removing all weeds for several weeks. Chemical control is done by nematicides, either as fumigants or non-fumigants. Fumigants have the disadvantage that they don’t reach nematodes at deeper soil levels. The environmental damage of nematicides is high and their use should only be considered on high value crops.