Abstract

      Two experiments were carried out in the year 2008 to study the effectiveness of Bacillus thuringiensis and Sacchvomyces cervisiaci bioactive in controlling Meloidogyne  root-knot nematode on Eggplant plants.. the effectiveness of 5% of the number of galls and egg sacs and the density of nematodes compared to the control, and it is noticed that the percentage of reduction increases directly with the increase in concentration, as the concentration was given 15%. With an average of 97.9 - 94.9%, the concentration was followed by 10% and the concentration was 5%, the least effective. Also, we find that B. thuringiensis bacteria improved the growth of plants and thus outperformed the control treatment at concentrations 5-10%, while we found that a higher concentration of 15% inhibited the growth of plants. The results also showed that the treatment of the baking yeast Sacchvomyces cervisiaci ,with all its concentrations tested in this study, was superior to that of the control, where  as all the baking  yeast concentrations showed efficacy in hindering the development of the nematode knot in the roots and the best of them was 1.5%, which gave a reduction rate of the galls and egg sacs by an average of 0.5-0.0% and a reduction rate of worms in the roots of plants and the station soil with an average of 92.9 - 91.4, followed by a medium concentration of 1%. The lowest concentration is 0.5%. We find that the treatment of bread yeast improved the growth of eggplant seedlings, and it significantly outperformed at the level of 5% on the control parameter, and the average concentration of 1% gave the best growth rates for eggplant seedlings among the yeast concentrations with an average length of 14.3 cm, a vegetable weight of 4.6 g and a dry weight of 2.7 g, followed by the concentration, the lowest is 0.5%, while the growth rates decreased by increasing the concentration to 1.5%.