Tomato Yellow Leaf Curl Virus (TYLCV) is one of the main causes to decrease productivity and quality of growth plant, especially solaniacease. The most effective method to prevent TYLCV is the using of resistant varieties. Infectious method is very important to estimate disease-resistant capability of tomato because TYLCV is not widen by brokerage mechanics but by infected vector. In this article, the authors announced the results of estimates three infectious TYLCV methods for three tomato species (PT18
DV2962 and GM2008), such as infection via Bemisia tabacci
infection via approach graftage and via Agrobacterium tumefaciens carrying virus genome. Among them, the authors found that infectious via approach graftage show the best result, high infectious proportion, easy to performance and easy to time control.