The present invention concerns methods for controlling nematode infestation via dsRNA mediated gene silencing, whereby the intact nematodes are contacted with a double-stranded RNA and whereby the double-stranded RNA is taken up by the intact nematodes. In one particular embodiment, the methods of the invention are used to alleviate plants from nematode pests. Alternatively, the methods are used for treating and/or preventing nematode infestation on a substrate or a subject in need of such treatment and/or prevention. Suitable nematode target genes and fragments thereof, dsRNA constructs, recombinant constructs and compositions are disclosed.