Vol. 12, Special Issue 12 (2023)

Author(s):
SR Parmar, JJ Dhruv and Tulika Singh

Abstract:
Twenty tomato cultivars were screened to study their reaction to root-knot nematode (Meloidogyne incognita and Meloidogyne javanica) in microplot experiment. At 60 days after nematode infected plants, whole plants were uprooted, washed and ranked for root galling on the basis of root-knot index (1-5 scales). All the tomato varieties had shown varying degree of responses. Twenty tomato cultivars were screened against root knot nematode observation recorded on number of galls/plants, root-knot index, root-knot reaction, shoot length, shoot weight, root length and root weight in root and reactions of the varieties to the test nematode, Meloidogyne incognita and Meloidogyne javanica. The observation was recorded at 60 days after transplanting nematode inoculation and the root galling on the basis of root knot index (1- 5 scale) was given to respect cultivars. Out of twenty varieties for three cultivars, eight varieties and nine cultivars, moderately resistance, susceptible and highly susceptible respectively, Meloidogyne incognita and Meloidogyne javanica. After the infection of root knot nematode in roots of tomato significantly reduced in growth characters like root weight, root length, shoot weight and shoot length against Meloidogyne incognita and Meloidogyne javanica.