Document Type : Research Paper
Authors
1
Former M.Sc. Student, Faculty of Agriculture, Yasouj University, Yasouj, Iran
2
Assistant Professor, Faculty of Agriculture, Yasouj University, Yasouj, Iran
3
Professor, Faculty of Agriculture, Yasouj University, Yasouj, Iran
Abstract
The effect of different concentrations of mallow (Malva sylvestris) and poppies (Papaver rhoeas) leaves and walnut (Juglanse regia) green husks extracts were investigated on hatching and mortality of second-stage juveniles of Meloidogyne javanica under experimental conditions. In J2 mortality test, the extracts were used in 14 levels of mallow (0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.75, 1, 1.25, 1.5 and 2%), 7 levels of poppy (0.5, 1.5, 2, 2.5, 3, 3.5 and 4%) and 8 levels of walnut green husks (1, 2, 3, 3.5, 4, 4.5, 5 and 6%). In three independent tests, controlling effect of 100 milliliters of the obtained lethal concentrations (LC20, LC50 and LC80) of each extracts (0.36, 0.58 and 0.94% for mallow; 2.3, 2.9 and 3.8% forpoppies; 2.68, 4.07 and 5.18% for walnut green husks) on M. javanica were evaluated under the greenhouse condition. According to the results of this study, the nematicidal effect of all tested extracts against M. javanica was proved under laboratory conditions. In greenhouse trials, any increase in the concentration of plant extracts significantly improved the growth indices of tomato plants and also the obtained LC80of mallow, poppy and walnut green husks extracts significantly reduced the number of galls by 59, 71 and 74%, respectively, and the reproduction factor by 56.7, 85 and 87%, respectively, when compared to the control.
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