ABSTRACT
In recent years, some viral diseases have been increasing in the tobacco-growing regions of Vietnam and causing serious damage to the tobacco yield and quality. If it has no effective control, the viral diseases will injure serious harm in the tobacco field next time. Based on the research results in the prevention of viral diseases from 2016 to 2021, the Vietnam Tobacco Institute has built a process to control Potato Virus Y that harms the tobacco plants in Vietnam. During the experiment and application in tobacco cultivation practice, the process was effective against PVY disease. The application of the process, the disease rate and disease index of PVY were significantly reduced in the tobacco field, contributing to increasing yield, quality, and income for tobacco farmers. The insecticides and antivirus drugs made according to the process have increased their effectiveness, do not harm the growth and development of tobacco plants, little have residues in tobacco production. This process can control many other viral diseases on tobacco plants.