Effect of sugar beet plant residues on population density of root knot nematode, Meloidogyne incognita infecting cowpea and biochemical changes in treated plants
Effect of sugar beet plant residues on population density of root knot nematode, Meloidogyne incognita infecting cowpea and biochemical changes in treated plants
M. M. A. Youssef1†, Wafaa M. A. El-Nagdi1, and Mona G. Dawood2
ABSTRACT
Different sugar beet residues, fresh and dry leaves and mashed storage roots of sugar beet @20 and 10g were tested
for controlling root knot nematode, Meloidogyne incognita on cowpea in screen house. On the basis of the average
percentages nematode reduction, mashed storage roots at the highest rate (20g) achieved 85.1% increase followed by
dry leaves at the same rate caused the reduction 81.6%. Average nematode reduction (79.5%) was caused by using
fresh leaves of sugar beet at the highest rate followed by that occurred by the lowest one compared to untreated
control. Plant growth, number of nodules (produced by nitrogen fixing bacteria, Rhizobium) and yield followed the
same trend as the highest rate of sugar beet residues was used; there was the highest percentages increase of plant
growth, yield and number of nodules. It is clearly noticed that soluble carbohydrates, total carbohydrates, phenols
and soluble proteins in seeds increased at the different treatments compared to those of the untreated check and the
effect, in general, was higher by using the highest rate compared to the lowest one. On the other hand, the contents
of chlorophyll a, chlorophyll b and carotenoids in leaf increased at untreated check compared to those at different
treatments.
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June 2018
Pakistan Journal of Nematology, Vol. 36, Iss. 1, Pages 1-115
