Identification of the presence of exocortis virus in citrus trees have been based on the bark splitting symptoms showed in die trunk of trifoliate and Rangpur lime rootstocks within a period of 4-8 years. As a result of several tests made at the Liineira Experiment Station a very quick and efficient procedure was found to induce exocortis symptoms. By inoculating (budding) in the nursery vigorous Rangpur lime seedlings and cutting them back it was possible to see exocortis symptoms in the new sprouts growing from them within 4 months. These symptoms are yellow elongated blotches and splitting of the bark. This procedure seems to be the best and quickest field test for exocortis in a bud wood certification program.