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English :
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Comparative efficacy of some bioagents, plant oil and plant aqueous extracts in controlling Meloidogyne incognita on growth and yield of grape vines.
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Arabic :
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مقارنة كفاءة استخدام بعض الكائنات الحية و الزيوت النباتية و المستخلصات النباتية المائية فى مقاومة نيماتودا تعقد الجذور(ميلودوجين انكوجنيتا) وأثرها علي نمو ومحصول أشجارعنب الطومسون سيدليس
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| Abstract |
The current experiment was conducted to control the root-knot nematode; Meloidogyne incognita infecting Thompson seedless grapevines by using eight treatments as follows: some bioagents (Trichoderma harzianum and Arbascular mycorrhizae), some plant oil extracts (orange oil extract and jojoba oil) and plant aqueous extracts (Origanum majorana and Tagetes erecta) in comparison with oxamyl (24% EC) on grapes infected with root-knot nematode to determine their impact on growth and yield of grapevines during two successive seasons (2009&2010) under field conditions. The chosen vines were ten – year – old grown in a sandy soil in a private vineyard located in Alexandria – Cairo road, spaced at 1.75 x 2.75 m and irrigated by drip irrigation system where cane pruned and trellised by the Y shape system. Bioagents and plant aqueous extracts were added to the soil under vines three times / week after bud burst. 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 the three months from the time of application. In addition had increased physical characteristics of both clusters & berries, vegetative growth parameters, macro nutrient content and yield of Thompson seedless grapevines during two studied seasons (2009&2010) under field conditions. Both jojoba oil and orange oil extract were the most effective treatments in reducing total population and rate of build up of Meloidogyne incognita in both soil and roots up to the harvesting time. They also increased cluster weight, number of clusters, yield per vine as well as enhancing physical characteristics of berries, TSS % TSS / acidity ratio whereas, acidity was decreased in berry juice and improved vegetative growth parameters and increased total surface area / vine, wood ripening coefficient, total chlorophyll and percentages of total nitrogen, phosphorus and potassium of leaves. Data of root growth parameters showed that the extension of fine roots through the vertical direction (root density) expressed as length of the fine roots was significantly higher at (30 cm) depth in the soil profile, the horizontal extension of fine roots was more concentrated at the distance of (50 cm) from vine trunk. All treatments recorded the highest values of medium roots and large roots in both horizontal and vertical direction as compared with control but lower than oxamyl treatment. On the other hand, the treatments with bioagents (T. harzianum and A. mycorrhizae) were in the intermediate rank, whereas, treatments of plant aqueous extracts (O. majorana and T. erecta) were the least effective in both seasons. It can be concluded that jojoba oil and orange oil extract were the best safe treatments compared with oxamyl (24% EC) in reducing total population and rate of build up of root – knot nematodes, M. incognita and improving fruiting of vines yield and quality of the berries of Thompson seedless grapevines.
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| Publication year |
2012
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| Pages |
110-222
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| Organization Name |
Plant Pathology Research Institute (PPATHRI)
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| serial title |
Annal Agric. Sci., Ain Shams Univ.,Cairo
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| Author(s) from ARC |
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| Publication Type |
Journal
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