Screening and identification of Piper species as rootstocks resistance against the root knot nematode under glasshouse condition
Keywords:
Piper species, screening, Meloidogyne incognita, resistanceAbstract
A study was conducted to evaluate the reaction of different Piper species to root knot nematode (Meloidogyne incognita) and the nematode reproduction were studied in the nematode infested pot culture experiment. Three Piper species viz., Piper colubrinum, Piper argyrophyllum and cultivated Piper nigrum varieties of IISR Sakthi, IISR Thevam, Panniyur-1 and Karimunda were screened. In this study, seven rootstocks were evaluated for resistance based on the growth of pepper cuttings and resistance indexes to Meloidogyne incognita, which were surveyed 45 days after inoculation with M. incognita. The observation was recorded viz., nematode soil population (200 cc), number of galls, number of egg mass, number of females, gall index. All the Piper species show varying degree of response. Out of seven rootstocks used in this experiment IISR Sakthi were found to be highly resistant, Piper colubrinum, IISR Thevam and Karimunda resistant to root knot nematode and these cultivars can be used as a source of resistance. Black pepper (Piper nigrum L.), in particular, suffer extensive damage due to root-knot nematodes, and only a few wild species are known to be resistant. Grafting of cultivated plants to rootstocks of known resistant Piper species rootstocks could be an effective method to resolve this problem.
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