INDUCTION OF SYSTEMIC RESISTANCE AGAINST TOMATO ROOT ROT DISEASE UNDER GREENHOUSE CONDITIONS | ||||
Zagazig Journal of Agricultural Research | ||||
Article 10, Volume 45, Issue 3, May 2018, Page 931-944 PDF (252.33 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/zjar.2018.49135 | ||||
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Authors | ||||
Hend T. Eid1; M. S. Abbas2; Amira S. Soliman2; Noher A. Mahmoud 3; Nagi M. Abou-Zeid1 | ||||
1Ident. Microorgan., Biol. Control of Pl. Dis. and Eval. Fung. Unit, Pl. Pathol. Res. Inst., Agric. Res. Cent., Giza, Egypt | ||||
2Natural Resources Dept., Inst. Afr. Res. and Studies, Cairo Univ., Egypt | ||||
3Plant Pathol. Res. Inst., Agric. Res. Cent., Giza, Egypt | ||||
Abstract | ||||
Induction of systemic resistance against tomato root rot is considered save and good strategy for controlling this serious disease which lead to delay growth and death of severely infected plants especially under protective production. Sixteen isolates of Rhizoctonia solani and ten of Fusarium solani were isolated from diseased tomato samples collected from ten Egyptian governorates. The isolated fungi were differed in their virulence on tomato plants. Kafr-El-Sheikh isolates No.16 of R. solani and Gharbia isolate No.8 of F. solani were significantly more aggressive than the others. All tested antagonistic treatments including bioagents, biocides, chemical inducers and plant oils as well as Vitavax-200 significantly reduced the disease severity under greenhouse conditions. The results also revealed that dipotassium hydrogen phosphate at 2% concentration, Bio- Arc and Bio-Zeid at recommended doses recorded the least disease severity caused by the isolated pathogens, followed by Trichoderma koningii (14), T. harzianum (15) and Acinetobacter genospecies (B40). Other treatments were less effective. Soaking roots of tomato seedling for two hours in most of biotic and abiotic inducers before transplanting in soil infested with the pathogenic fungi increased peroxidase, polyphenol oxidase and chitinase activities at 14 days post inoculation (dpi) to values more than 7 dpi. | ||||
Keywords | ||||
Tomato root rot; Biocides; Trichoderma spp; abiotic inducers; Rhizoctonia solani; Fusarium solani | ||||
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