| Titles |
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English :
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Biological control of Meloidogyne javanica on tomato plants with isolated bioagents in Egypt
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Arabic :
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المكافحة الحيوية لنيماتودا تعقد الجذور( ميلودوجين جافنيكا) على نباتات الطماطم باستخدام عزلات كائنات حيوية تحت الظروف المصرية
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| Abstract |
Eight antagonists; Bacillus subtilis, Bacillus thuringiensis, Trichoderma harzianum, Gliocladium virnes, Paecilomyces 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 of 2nd 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 Saccharomyces cerevisiae while the lowest effective was the isolate cell of T. harzianum. The tested Saccharomyces spp. cells was more harmful to the nematode juveniles than their filtrates of the same Saccharomyces spp. Also, adding all bioagents treatments decreased number of nematodes in both roots and soil. In addition the crop of tomato increased after adding the treatments at concentration (1:10) under field conditions.
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| Publication year |
2006
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| Pages |
6301-6315
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| Organization Name |
Plant Pathology Research Institute (PPATHRI)
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| Country |
Egypt
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| serial title |
J. Agric. Sci. Mansoura Univ
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| Volume |
31
. 9
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| Author(s) from ARC |
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| Publication Type |
Journal
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