title: Study on infection symptoms of root-knot nematode, Meloidogyneja vanica, on the stem of the tomato seedlings in greenhouse.
abstract: On the first of seeds germination, Meloidogyne javanica induced knots on the stem eventually by to penetrate into the coleoptiles. In this experiment, used soil was loamy-sandy type, pH=7.2, including 1.5% composts. Tomato seedlings of cultivar Rutgers were used as host. This experiment was conducted in Completely Randomized Design with 3 treatments and 10 replicates as fallow: (1) control, (2) 10 J2s/cm3 of soil, (3) 20 J2s/cm3 of soil. In each pot (1000 cm3), 50 seeds were planted. Inoculation was done, a day after to plant seeds, in 2 cm depth. Pre-emergence and post-emergence damping-off, number of stem-knots, height of knots on the stem in 3 treatments was more than 2 treatments. In some of the pots of 2 treatments were not observed stem-knots. As long as four weeks after planting, there was not significant difference in fresh weight and height of the seedlings in treatments. Numbers of adult females in 3 treatments were more than 2. In the stem-knots, collenchymas tissue, endodermis and stem cambium were found deformed J2s and J3s, and adult females.
authors.affiliation: University of Tehran, Faculty of Agriculture, Karaj, Iran.
authors.forename: A
authors.initials: A
authors.lastname: Saeedizadeh
authors.forename: A
authors.initials: A
authors.lastname: Kheiri
authors.forename: S M
authors.initials: SM
authors.lastname: Okhovvat
authors.forename: J
authors.initials: J
authors.lastname: Zad
mesh_terms: D000818:Animals; D005260:Female; D007492:Iran; D018551:Solanum lycopersicum / Q000469:parasitology*; D018517:Plant Roots / Q000469:parasitology; D011897:Random Allocation; D012987:Soil / Q000469:parasitology*; D014431:Tylenchoidea / Q000254:growth & development / Q000472:pathogenicity*
chemical_list: D012987:Soil