Evaluation of Some Medicinal Plant Oils and A Nematicide for Controlling Virus- Transmitted Nematode and Other Nematodes on Table Grapes

摘要

UNDER FIELD conditions, this research focused on the association of certain plant parasitic nematodes with eighteen cultivars of table grape and on controlling of three nematodes viz., Rotylenchulus reniforinis: Tylenchulus semipenetrans and Xiphinemaamericanum by two incuiciijai plant oils and a nematicide. Association of Rotylenchiihis reniforinis: Tylenchulus semipenetrans and Xipliinema americanum is showed that, on the basis of, reproduction factor the different cultivars were classified as susceptible or highly susceptible. When using control methods, soil drench treatment reduced the population density of Rotylenchulus reniformis; Tylenchulus semipenetrans and Xiphinema americanum higher than foliar treatment and the combined treatment between foliar and soil drench gave the best results in controlling the mentioned nematodes higher than those in the single treatment. Neem oil treatment, to some extent, gave higher nematode and virus reduction more than jojoba oil. Virus vector nematodes ofspecies is responsible for vectoring several important virus diseases to grapevine (Vitis vinifera). Arobis mosaic virus (ArMV) Nepovrus: Grapevine fanleaf virus (GFLV) Nepovrus: Peach rosette mosaic virus (PeRMV) Nepovrus; Prunus necrotic ring spot virus (PNRSV)Iiarvirus and Tomato ring spot virus (TomRSV) Nepovrus were detected in naturally infested grapevine plants growing in the Horticulture Institute Experimental Station Giza Governorate. it is very difficult to eradicate nematodes completely fromthe invested vineyards. Therefore, nematicides must be used periodically. As such it can be stated that combined application (Foliar spraying and soil drench) of jojoba or neem oils were the highest the safe best treatments compared with Oxamyl 24% L was the lowest safe, in addition to, they achieved the best yield and its components as well as the best physical properties of bunches, improved the chemical characteristics of berries and ensured the best vegetative growth parameters in comparison with control.