Use of nitrifications inhibitors and bacterial inoculation in controlling root knot nematode Meloidgyne incognita in tomato plants

Abstract: This study aimed to use Thiourea at different concentrations as nitrification inhibitor, ammonium sulphate as mineral nitrogen fertilizer and bacterial strain Bacillus polymyxa as plant growth rhizobacteria regulator individual or /and in combination with tomato plants to control the population of root knot nematodes Meloidogyne incognita under laboratory and greenhouse experiments . Laboratory experiment revealed that high percentage of juveniles mortality occurred during all the exposure periods of all treatments especially after 72 hr. The data also showed that the use of combination treatments (Thiourea, ammonium sulphate and Bacillus polymyxa) had significant effect on juveniles mortality especially at the highest concentration of Thiourea (3% /pot). While, using of ammonium sulphate individually showed the lowest effect of mortality. On greenhouse experiment combination of all treatments showed the most reduction effect of numbers of galls, egg masses, egg numbers/plant and number of 2nd stage juvenile in tomato rhizosphere soil. On the other hand, ammonium sulphate individually showed the least effect on the treatments. In addition all the combination treatments increased the fresh weight of tomato roots and shoots, except the highest concentration of Thiourea at level of 3 % /pot had negative effect on tomato plants.Summing up of these results due to the increase of ammonium levels around the tomato rhizosphere caused highly reduction of nematode populations
Publication year 2006
Pages 281-293
Organization Name
Country Egypt
serial title The First International Egyptian Jordan In Biotechnology
Author(s) from ARC
Publication Type Conference/Workshop