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.
The study aimed to use two culture algal Spirulina platensis, Anabaena azollae, Azolla pinnata and Pleurotus columbinus besides olive mill waste in controlling root knot nematode, Meloidogyne javanica in banana was monitored under both laboratory and commercial greenhouse conditions. Laboratory experiment revealed that high juvenile mortality percentage occurred during all the exposure periods of all treatments, the best results were after 72 hr exposure. Spirulina platensis followed by Anabaena azollae, Azolla pinnata, Pleurotus columbinus and olive watery extract significantly increased juveniles mortality up to 70%after 72h at the highest concentration of 1:10 (85.2, 81.4, 79.9, 73.5, 71.7 and 70.1%, respectively).In the productivity greenhouse experiment, the combination of culture filtrates of Spirulina platensis, Anabaena azollae, Azolla pinnata, Pleurotus columbinus and olive mill waste water achieved the highest reduction in the number of total nematodes in both soil and roots, also in numbers of galls. In addition, all combinations significantly increased the crop yield of banana plants comparing with the individual treatment and the control.The combined treatments significantly enhanced the CO 2 evolution, dehydrogenase and nitrogenase activities over the control. It could be recommended that application of biological control agents against root knot nematode in banana is preferable to reduce the chemical nematicides inputs.
These experiments were conducted to control the root-knot nematodes, Meloidogyne incognita under both greenhouse and field conditions in superior seedless vineyards and its reflection on yield. The field experiment was carried out in a private vineyard (El Wady El Faregh) in Alexandria-Cairo road (kilo 78). Seven treatments were used as follows: two bioagents (Bacillus subtilis and Trichoderma harzianum), two blue green strains algal species (Cyanobacteria) (Spirulina platensis and Oscillatoria sp.) and two plant aqueous extracts (Ambrosia maritime and Eucalyptus globules) at three concentrations, and in comparison with oxamyl (24% EC) were used to control Meloidogyne incognita on superior seedless vineyards on grapes under both greenhouse and field conditions. Bioagents, algal species and plant extracts were added to the soil under vines one time weekly for three weeks after bud burst under both greenhouse and field conditions. The most effective treatments in controlling root-knot nematodes; Meloidogyne incognita were both Spirulina platensis and Oscillatoria sp whereas the least effective was suspension of Eucalyptus globules under both greenhouse and field conditions. Both Spirulina platensis and Oscillatoria sp acheived the highest reduction effect on number of 2 nd stage juveniles in soil, numbers of galls, developmental stages, females, egg masses, egg numbers/egg mass in roots and final population Meloidogyne incognita on grape plants, whereas the suspension of Eucalyptus globules was the least effective treatment under both greenhouse and field conditions. In addition all treatments increased fresh weight of the whole plant over control under greenhouse conditions. Results showed that all the treatments had a significant effect in reducing the total population and build up of root-knot nematodes, Meloidogyne incognita in both soil and roots especially after three months from the time of application. In addition, all treatments had increased the yield of superior seedless grapevines under field conditions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.