Abstract
The resistance of local and introduced tomato varieties to early blight (Alternaria solani Sorauer) and late blight (Phytopthora infestans (Mont.) de Bary) were evaluated in the field and to bacterial wilt (Ralstonia solanacearum) were tested under artificial infection in greenhouse conditions. Three varieties (De-brao krasnii, De-brao Rozovii and Sultan F1) showed the moderate resistance to early blight, while the only two varieties (De-brao krasnii and De-brao Rozovii) were moderate resistant to late blight. The remaining samples showed susceptibility to disease.
 The tested varieties showed a different degree of resistance to the bacterial wilt. Four varieties: Rozovii Gigant, Krachodarskii Krasnii,Tarasenko and Lagidnii appeared to be resistant; Two varieties: Fakel and Polbig showed the moderate resistance and the rest ten varieties were susceptible to the disease.
Highlights
The resistance of local and introduced tomato varieties to early blight (Alternaria solani Sorauer) and late blight (Phytopthora infestans (Mont.) de Bary) were evaluated in the field and to bacterial wilt (Ralstonia solanacearum) were tested under artificial infection in greenhouse conditions
The cultivated tomato (Solanum lycopericum) is one of the most popular and widely used foods in Georgia. It was introduced in the second half of the XVIII century in Georgia and it is grown in all regions up to 1700 meters above sea level
Bacterial wilt was identified for the first time in 2011 in Chkorotsku and Kutaisi regions
Summary
The resistance of local and introduced tomato varieties to early blight (Alternaria solani Sorauer) and late blight (Phytopthora infestans (Mont.) de Bary) were evaluated in the field and to bacterial wilt (Ralstonia solanacearum) were tested under artificial infection in greenhouse conditions. The tested varieties showed a different degree of resistance to the bacterial wilt. The cultivated tomato (Solanum lycopericum) is one of the most popular and widely used foods in Georgia It was introduced in the second half of the XVIII century in Georgia and it is grown in all regions up to 1700 meters above sea level. Natural climatic conditions of Georgia are favorable for development tomato diseases, the level of damage depends on the varieties, on the infection time and severity, crop grown season climate, etc. Adoption of disease resistant varieties/hybrids is the most environmentally friendly practical way to solve this problem, especially to control Ralstonia solanacearum
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