The present invention relates to methods for generating resistance against Cucumber Green Mottle Mosaic Virus (CGMMV) in plants, in particular in plants susceptible to infection by CGMMV, such as Cucurbitaceae species, including melon, cucumber, watermelon and bottlegourd. The methods are based on the use of genetic constructs that induce post-transcriptional gene silencing and/or use a nucleotide sequence that encodes a defective variant of the replicase of CGMMV.