Disease intensity of some tomato viroses in Serbia

In this paper rye present the data on the disease intensity of the tomato p lants grown in glass and plastic-houses, and in the open field. The infecti on was caused by the following viruses: Tomato mosaic virus (ToMV), Tobacco mosaic virus (TMV), Tomato spotted wilt virus (TSWV), Alfalfa mosaic virus (AMV), Potato virus X (PVX), Potato virus Y (PVY), Tomato black ring virus (TBRV), Tomato ringspot virus (ToRSV), Tomato aspermy virus (TAV), and Cuc umber mosaic virus (CMV). These viruses represented most frequent tomato pa thogens in Serbia. According to the obtained results, it could be concluded that 92.94 % of th e rested tomato plants grown in glass and plastic-houses, and 89.82 % grown in the open field were infected by one of the above viruses. Most of the p lant samples were infected by two or more viruses. The most frequent viruse s - tomato pathogens in Serbia were ToMV, PVY and TMV.