The process of RNA interference (RNA $i$ ) involves silencing of a specific $m$ RNA due to a complementary dsRNA molecule that binds to and prevents translation of the $m$ RNA, also referred as RNA silencing.
Related Theory
In RNAi, the source of this complementary $R N A$ could be from an infection by viruses having RNA genomes or transposons. Using Agrobacterium vectors, nematode-specific genes were introduced into the host plant such that it produced both sense and antisense RNA in the host cells. Two RNAs being complementary to each other formed a double stranded RNA (dsRNA) and thus, silenced the specific $m R N A$ of the nematode. The process of RNA interference was adopted to prevent the infection of tobacco plants by Meloidegyne incognita.