Effect of Plant Mineral Nutrition on Tomato Plant Infected with Meloidogyne Incognita Under Greenhouse Conditions
Journal Title: Egyptian Journal of Agronematology - Year 2014, Vol 13, Issue 1
Abstract
Tomato (Solanum lycopersicum L.) is one of the most important vegetable plants in the world.Root-knot nematodes (Meloidogyne incognita) causing problems in all growing tomato areas in Egypt. The use of such mineral nutrients is the most environmentally successful method for limiting root-knot nematode damage. In this study seven plant mineral nutrients i.e. calcium sulphate, zinc sulphate, magnesium sulphate, iron sulphate, potassium sulphate N.P.K(20:20:20) and urea (5g/pot each) separately were evaluated comparing with oxamyl on root-knot nematode (1000 second stage juveniles/ pot each) infecting tomato plant cv. Castle Rock under greenhouse conditions (19±3ºC). Calcium sulphate showed the maximum values in improving total plant fresh weight (65.0%), plant length (80.2%), shoot dry weight (97.2%) and number of leaves per plant (24.2%), with the highest reduction percentage in nematode population density that averaged 92.3%, followed by that of urea application (85.5%), respectively. Rates of nematode build-up under the stress of seven mineral nutrients and oxamyl were adversely affected. Such rates ranged between 0.1 to 1.8 vs 4.2 for nematode alone. Namely, calcium sulphate treatment had reasonable lower value of reproduction, (0.3) while, that of zinc sulphate had the highest one (1.8), whereas oxamyl recorded a lowest rate ( 0.1), respectively. Oxamyl as a systemic nematicide ranked second to calcium sulphate in suppressing nematode population density (88.7%), and ranked first in diminishing galls and eggmasses numbers with values of 88.2 and 100.0%, respectively.
Authors and Affiliations
A. El-Sherif, S. Gad
Keywords
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