BIOLOGICAL CONTROL OF Meloidogyne javanica ON TOMATO PLANTS WITH SOME ISOLATED BIOAGENTS IN EGYPT | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 4, Volume 31, Issue 9, September 2006, Page 6049-6063 PDF (226.73 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2006.235250 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Samaa M. Shawky,; Rania Z. El- Shennawy; A. M. Shady | ||||
| Plant Pathology Res. Inst., Agric. Res... Center, Giza, Egypt. | ||||
| Abstract | ||||
| Eight antagonists; Bacillus subtilis, Bacillus thuringiensis, Trichoderma harzianum, Gliocladium vimes, Paecilornyces lilacinus and three yeast (Saccharomyces spp.) isolated from Egyptian soil at different concentrations were used to control root-knot nematode. Meloidogyne javanica under laboratory and green house conditions on tomato plants. The most effective isolate in controlling root-knot nematodes was the isolate of T. harzianum whereas the least effective were the isolates of yeast (Saccharomyces spp.) under both laboratory , greenhouse and field conditions. Under laboratory conditions applying the antagonistic bacteria, fungi and yeast achieved high percentage of juvenile mortality at the highest concentration (1:10) during all exposure periods especially after 72 hours. Under greenhouse conditions T. harzianum was more effective in reducing numbers of galls, egg-masses and eggs per plant and number 01'2“" stage juveniles in soil whereas, the least effective isolates were those of the yeast (Saccharomyces spp.). Adding all antagonistic bacteria, fungi and yeast increased the fresh weight of root and shoot system on tomato plants at all tested concentrations especially in the highest concentration (1 :10). Using the antagonistic bacteria, fungi and yeast in both (filtrates and cells) achieved high percentage of juvenile mortality during all exposure periods especially after 72 hours under laboratory conditions. The most effective isolate filtrate on juvenile mortality was T. harzianum, while the lowest effective was the isolate filtrate of Saccharomyces spp. The most highest effective isolate cell on juvenile mortality was Saccharornyces cerevisiae while the lowest effective was the isolate cell of T. harzianum. The tested Saccharomyces spp. cells were more harmful to the nematode juveniles than their filtrates of the same Saccitaromyces spp. Also, adding all bioagents treatments decreased number of nematodes in both roots and sell. In addition the crop of tomato increased after adding the treatments at concentration (1 :10) under field conditions. | ||||
| Keywords | ||||
| Control; root-knot nematodes. Bacillus subfilis; B. thuringiensis; Trichoderma harzianum; Gliocladium vimes; Paecilornyces lilacinus; Saccharomyces spp | ||||
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