Efficacy of some natural plants and bioagents to minimize the population of root-knot nematode; Melidogyne incognita in superior seedless vineyards and its reflection on vine growth and yield
Abstract: This study was conducted to minimize the population of root-knot nematodes, Meloidogyne incognita under field conditions for two seasons 2005, 2006 in superior seedless vineyards and its reflection on vine growth and yield. The investigation was carried out in a private vineyard (El Wady El Faregh) in Alexandria-Cairo road (kilo 78). Six treatments (dry powder of Lantana camara (30, 60, 90 gm) dry powder of Nerium oleander ( 30, 60, 90 gm), suspension of Psudomonas fluorescens (1×105, 1×108, 5×108) suspension of Arthrobotrys oligospora (1×10 5, 1×108 , 5×10 8) and animal compost (10 kg/tree) were applied in addition to the nematicide, Mocap (40 kg/feddan). All natural plants and biogents were added to the soil under vines three times/week after bud burst. Data showed that use of animal compost (10 kg/tree), Psudomonas fluorescens (1×108, 5×108), suspension of Arthrobotrys oligospora (1×108, 5×108) dry powder of Lantana camara (60gm) and Nerium oleander (90 gm) were most effective in decreasing the total population of root-knot nematodes, Meloidogyne incognita after three months from the time of their application under field conditions for the two seasons of the investigation. Using both animal compost and suspension of Psudomonas fluorescens were more effective in reducing total population of root-knot nematodes, Meloidogyne incognita whereas, the least effective was the dry powder of Nerium oleander under field conditions. Animal compost at 10 kg/vine and the bioagent; P. fluorescens (at 5×108) showed the highest efficacy in reducing the total population of root-knot population (Meloidogyne incognita). This was reflected on achieving the best vegetative growth parameters and increasing leaf area, wood ripening coefficient, total chlorophyll and percentages of (N, P and K) in the leaves. Data also showed that the horizontal extension of fine roots was more concentrated at the distance of (50cm) from vine trunk than those at the distance of (100 cm) from vine trunk.The extension of fine roots through the vertical direction (root density) expressed as length of the fine roots was significantly higher at (0-30cm) depth than that found at (30-60cm) depth in the soil profile. In addition, an obvious increase in medium roots (2-6mm) was observed either at (50cm) distance or at (30-60cm) depth. The growth of medium roots was reduced by increasing the distance more than (50cm) from vine trunk or the depth more than (30cm) from soil surface. The results also indicated that all treatments used significantly increased cluster weight, number of clusters per vine, yield per vine as well as physical characteristics of berries. TSS%, TSS/acidity ratio were increased whereas acidity was decreased in berry juice. From the foregoing results, it can be concluded that compost at 10 kg/vine and the bioagent; P. fluorescens (at 5×108) induced a remarkable reduction in the nematode population (Meloidogyne incognita) and improved fruit quality and yield of Superior Seedless grapevines
Publication year 2006
Pages 264-280
Organization Name
Country Egypt
serial title The First International Egyptian Jordan In Biotechnology
Author(s) from ARC
Publication Type Conference/Workshop
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