Efficacy of some bioagents and plant extracts in controlling Tylenchulus semipenetrans on citrus in 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; Tylenchulus semipenetrans and control citrus nematodes by using bioagents and plant extracts under both greenhouse and field conditions. 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.Sven treatments (Psudomonas fluorescens, Arthrobotrys oligospora, Trichoderma harzianum, Origanum majorana, Tagetes erecta, Eucalyptus globules, at different concentrations, and oxamyl (24%)) were used to control T. semipenetrans under both greenhouse and field conditions on citrus. The most effective treatment in controlling citrus nematodes; T. semipenetrans was Psudomonas fluorescens whereas the least effective was suspension of Eucalyptus globules under both greenhouse and field conditions. Psudomonas fluorescens was more effective in reducing numbers of egg laying females, number of eggs/ egg-mass and number of second stage larvae in 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.
Publication year 2015
Pages 45-61
Organization Name
serial title Egyptian Journal of Agronematology
Author(s) from ARC
External authors (outside ARC)
    أحلام محمد الغنيمى قسم وقاية النبات- وحدة النيماتودا - مركز بحوث الصحراء – القاهرة - مصر
Publication Type Journal
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