Effect of Stolbur Disease on the Physical Characteristics of Indeterminate and Determinate Tomato Fruits

D. SAKALIEVA1, G. PEVICHAROVA2, N. SKANDALIS1 and D. GANEVA2
1 Agricultural University, BG-4000 Plovdiv, Bulgaria
2 Institute of Horticulture and Canned Foods, BG-4003 Plovdiv, Bulgaria

Abstract

SAKALIEVA, D., G. PEVICHAROVA, N. SKANDALIS and D. GANEVA, 2002. Effect of stolbur disease on the physical characteristics of indeterminate and determinate tomato fruits. Bulg. J. Agric. Sci., 8: 345–348

The objective of the present study was to assess the effect of stolbur disease on some physical characters of diseased and healthy fruits of indeterminate and determinate tomato plants. In the indeterminate plants, the coefficient of variation was higher in the diseased plants as compared to that in the healthy ones. In determinate tomatoes, the same tendency was observed for the carotene cultivar type. No significant changes were established in the relative weight of both healthy and diseased fruits. The variation of this parameter was low. The insignificant change in the relative fruit weight was associated with the maintenance of the weight/volume ratio in healthy and diseased fruits. The disease-caused damages of tomato quality were not exhibited to the same extent in all fruits of one line or cultivar. The stolbur disease changed weight, volume and laboratory waste and did not affect the relative weight of tomato fruits. The change in the structure of diseased fruits was not unidirectional. In indeterminate tomato cultivars, pericarp liquefaction was observed, while in some determinate plants – suberization.

Key words: tomato fruits, stolbur, physical characters