Pakistan Journal of Nematology (2012) 30, 143-149

M.M.A. Youssef, M.M.M. Mohammed and A.M. Korayam (2012)
Effect of organic and inorganic fertilizers on Meloidogyne incognita infesting sugar beet
Pakistan Journal of Nematology 30 (2), 143-149
Abstract: This experiment was conducted in a field having sandy loam soil infested with root-knot nematode, Meloidogyne incognita (Kofoid and White) Chitwood. Sugar beet (Beta vulgaris L.) cv. Sallow was grown in the field. The soil was treated with a mixture of cattle manure (30m³), calcium superphosphate (15.5% P₂O₅) (250kg/fedden), potassium sulphate (48% K₂O) (100kg/fed.), ammonium sulphate (33.5% N) (100kg/fed.) and sulphur (100kg/fed.) at the rates of 7.5, 5.0 and 2.5kg/m² with equivalent to 30, 20 and 10 tons/fed. The mixed fertilizers were added to the soil at the time of sowing, after thinning and during root formation. Results obtained showed that the number of galls significantly decreased with increasing the applied fertilizer rates, except the number of egg-masses as the highest percentage reduction of 85.9% occurred when the plants were treated by the mixed amendments at the highest rate after thinning, while the highest reductions of 84.1 and 84.7% were achieved at the moderate rate (20 tons/fed.) at the times of sowing and root formation, respectively. As for yield of roots, production per feddan (equal to 4200 m² area) significantly increased especially at the moderate rate of application when the plants were treated at the time of sowing. Phytotoxicity occurred at the highest rate of fertilizers.
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Database assignments for author(s): Mahmoud M. Ahmed Youssef

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne incognita	Beet/sugarbeet (Beta vulgaris)	Egypt