Inheritance of resistance to foot and root rot caused by Phytophthora nicotianae v. Breda de Haan var. nicotianae in tomato (LycopersiconMill.).
SummaryDifferent levels of resistance to foot and root rot caused by P. nicotianae var. nicotianae were found, with the highest level in four American lines. The resistance of these lines depends on one incompletely dominant major gene.
Inheritance of resistance to fruit rot (Phytophthora parasiticaDast.) in tomato (Lycopersicon esculentum Mill.)
SummaryFruit rot disease caused by Phytophthora parasiticaDast. is a limiting factor in tomato production in Himachal Pradesh. 30 to 60 per cent fruits are damaged by this disease. Crosses were made between EC 54725 (Lycopersicon pimpinellifolium), a small tyuited type, resistant to fruit rot and four highly susceptible tomato commercial cultivars (Gola, Sioux, S12, and Lalmani). Studies of F1's, F2's and back crosses indicated that EC 54725 carries a dominant gene imparting resistance to fruit rot.
The influence of antibiotics on micro-organisms causing fruit and vegetable rots
IN THE EARLY work on antibiotics, most efforts inclined toward studies concerning bacterial pathogens, particularly those of man, probably because most antibiotics were found to be more effective against bacteria than against fungi (Eumycophyta) , and because bacterial diseases of man are more numerous and more serious than fungus infections. However, some of the more recent antibiotics have been shown to be effective against fungi (Ammann, et al. 1955; Brian 1949; Charney, et al. 1955-56;