SURVEY AND CONTROL TRIALS OF ROOT ROT / WILT OF DATE PALM OFFSHOOTS IN NEW VALLEY GOVERNORATE | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 1, Volume 90, Issue 4, December 2012, Page 1403-1414 PDF (334.63 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2012.163415 | ||||
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| Authors | ||||
| MAGED E.A. EL-MORSI; MOHSEN E.A. ABO REHAB; SAMAY A. EL-MORSY | ||||
| Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt | ||||
| Abstract | ||||
| Root rot/wilt of date palm offshoots was surveyed during seasons of 2011 and 2012 starting from March to October in nurseries and orchards in different major areas of the New Valley Governorate (at El-Kharga, Paris, El-Dakhla, El-Farafrah and Eastern Owinat). The average percentage of disease incidence ranged between 48.0 and 68.6% and the severity of the disease ranged between 37.7 and 53.7%. Eleven fugal species were isolated from rotted roots of diseased offshoots. Frequency of the isolated fungi varied according to the locality, where Fusarium oxysporum was the most frequent fungus in all localities followed by F. solani, F. moniliforme, F. semitectium, and F. equiseti. Pathogenicity tests showed that Fusarium oxysporum, F. solani, F. moniliforme, F. equiseti and F. semitectium were pathogenic to date palm offshoots, but they differed in their pathogenic potentials. Fusarium oxysporum, F. solani and F. moniliforme caused the highest disease incidence and severity. Efficiency of five different fungicides (Kemazed, Maxim XL, Moncut, Rizolex T and Topsin M70) varied in reducing the disease., Kemazed, Maxim XL Rizolex-T and Topsin M70 at conc. 100-200 ug/me and Moncut at 200 ug/me completely inhibited growth of the tested fungi in vitro . Under field conditions, Topsin M70, Maxim XL, Rizolex-T and Kemazed, were the most effective fungicides in controlling root rot d wilt of date palm offshoot | ||||
| Keywords | ||||
| Date palm disease; Root rot; wilt; Saidy and Barhee varieties; fungicides | ||||
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