Screening the tolerance of tomato (Lycopersicon esculentum L.) cultivars and landraces to Egyptian broomrape (Orobanche aegyptiaca pers.) under greenhouse conditions

In order to study to evaluate the tolerance of some tomato (Lycopersicon esculentum L.) cultivars and landraces to Egyptian broomrape (Orobanche aegyptiaca pers.) an experiment was conducted as completely randomized design with 3 replications in greenhouse conditions. In this experiment, 23 cultivars and 4 landraces of tomato were planted in two series of treatments (infected and uninfected (control) with broomrape). Results showed that tomato cultivars and landraces had a significant difference in their biomass and broomrape reduced fresh and dry weight of all all tomato cultivars and landraces significantly. Urbana, GS15, Marconi cultivars and all landraces of tomato were the most susceptible hosts to broomrape. In contrast Cal-jN3, Primo, Hyb.Petopride V, Hyb.Xaman and Hyb.Super Set showed lowest loss percent of shoot and root dry weight in present of broomrape compared to other cultivars. Also, comparison of tomato landraces and cultivars showed that despite higher biomass production of the landraces in control treatments, they were more susceptible and suffered more severe damage in infected treatments