Efficacy of some Bioagents and Plant Extracts in Controlling TylenchulusSemipenetranson Citrus in Egypt | ||||
| Egyptian Journal of Agronematology | ||||
| Article 5, Volume 14, Issue 1, January 2015, Page 45-61 PDF (1.7 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejaj.2015.60387 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Samaa Shawky1; Ahlam Al-Ghonaimy2 | ||||
| 1Nematode Research Department, Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt | ||||
| 2Plant Protection Department, Nematology Unit- Desert Research Center, Cairo, Egypt | ||||
| Abstract | ||||
| This study was conducted to determine the susceptibility of four citrus rootstock; Sour orange (SO), Volkameriana (VOL), Cleopatra mandarin (CM) and Troyer citrange (TC) to citrus nematode; Tylenchulussemipenetrans and control citrus nematodes by using bioagents and plant extracts under both greenhouse and fieldconditions. In addition to determine the citrus yield (cv. Volkameriana) in Egypt. Data showed that Volkameriana is the most susceptible rootstock; whereas Troyer citrange is the least susceptible rootstock to the citrus nematodes under greenhouse conditions. Seven treatments (Psudomonasfluorescens, Arthrobotrysoligospora, Trichodermaharzianum, Origanummajorana,Tageteserecta, Eucalyptus globules, at different concentrations, and oxamyl (24%)) were used to control T. semipenetrans under both greenhouse and fieldconditions on citrus. The most effective treatment in controlling citrus nematodes; T. semipenetrans was Psudomonasfluorescens whereas the least effective was suspension of Eucalyptus globules under both greenhouse and field conditions. Psudomonasfluorescens was more effective in reducing numbers of egg laying females, number of eggs/ egg-mass and number of second stage larvaein the soil, whereas the suspension of Eucalyptus globules was the least effective under both greenhouse and field conditions. Under greenhouse conditions all treatments led to increase the total fresh weight of shoots and roots of citrus seedlings especially at the highest concentration. The application of treatments achieved high decrease in nematodes population in both roots and soil under both greenhouse and field conditions also, increased the yield of citrus under field conditions. | ||||
| Keywords | ||||
| Efficacy; rootstock; citrus nematodes; T. semipenetrans; Psudomonasfluorescens; Arthrobotrysoligospora; Trichodermaharzianum; Origanummajorana; Tageteserecta; Eucalyptus globules; oxamyl andcitrus | ||||
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