Effects of Plant Leaf Extracts on Egg-Masses Hatching and Juveniles Mortality of the Root-Knot Nematode, Meloidogyne Javanica

Abstract

Most of the nematicides are banned because of their harmful effect on human and environment; therefore scientists identified natural products with nematicidal activity such as plant extracts. the aim of this research paper was to study the effects of fresh leaf extracts of five different plants; Acasia Arabica, Ziziphus spina Christi, Eucalyptus camaldulensis, Lawsonia inermis and Dalbergia sissoo against egg-masses hatching and second stage juveniles mortality of root-knot nematode, Meloidogyne javanica under laboratory conditions. Results revealed that, all treatments extracts had significantly (P < 0.05) reduced in the hatching of egg-masses. The maximum reduction occurred in Acasia Arabica with the concentration (S) was (97.13%) and the concentration (S/2) was (89.99%), whereas the minimum reduction caused by Ziziphus spina Christi with the concentration (S) was (45.49%) and the concentration (S/2) was (24.63%). The same effects of plant extracts against M. javanica juveniles, the most mortality of second stage juveniles was observed in leaf extracts of Acasia Arabica, and Dalbergia sissoo with the concentration (S) was (100%) as regarding to and the concentration (S/2) was (100%) in Dalbergia sissoo, while the least in Ziziphus spina Christi with the both concentrations S and S/2 (17.0 and 5.33%), respectively.