Understanding how different viruses are transmitted will help in controlling viral infections in the orchid industry. Some orchid viruses (e.g. potyviruses) are transmitted by the seeds of an infected plant. OFV, CMV and several other potyviruses and tospoviruses are transmitted by arthropods, such as mites, and insects, such as aphids and thrips. Elimination of weeds that grow near orchids may help eliminate viral transmission. Viruses that infect orchids systemically (CymMV and ORSV) are spread through mechanical transmission by tools and pots contaminated with the viral-containing plant saps. Good horticultural practices such as weed and insect control, and the sterilization of cutting tools and pots prior to use, together with the identification and eradication of virus-infected plants are essential to prevent further spreading of viruses.