Screening of tuberose (Polianthes tuberosa Linn.) cultivars against reniform nematode, (Rotylenchulus reniformis)

Ten cultivars of tuberose (Polianthes tuberosa Linn.) viz., Sikkim Selection, Prajwal, Shringar, Rajat Rekha, Mexican Single, Hyderabad Single, Pearl Double, Vaibhav, Swaran Rekha and Suvasini were tested against reniform nematode. (Rotylenchulus reniformis). Nematode multiplied in good numbers on all the tested cultivars. Maximum number of nematodes on root as well as in soil were observed on cultivar Pearl Double. Nematode number was least on cultivar Swaran Rekha. Multiplication factor (initial nematode population/final nematode population) of more than 6 was observed on all the tested cultivars of tuberose, indicated absence of resistance in tested tuberose cultivars to reniform nematode. Non significant difference was observed between the multiplication factor values of Single Petalled and Double Petalled type cultivars, which is indicative of equal susceptibility in both the types of cultivars.