Archives of Phytopathology and Plant Protection (2012) 45, 2324-2334

Nagwa A. Abd-Elbary, M.F.M. Eissa and M.M.A. Youssef (2012)
Pathogenicity of the rice root nematode, Hirschmanniella oryzae to rice plants in relation to nematode reproduction, plant growth, grain yield and biochemical changes
Archives of Phytopathology and Plant Protection 45 (19), 2324-2334
Abstract: Influence of different inoculum levels of 0, 10, 100, 1000 and 10,000 individuals of Hirschmanniella oryzae on nematode reproduction and plant growth of rice cv. Giza171 and biochemical changes of infected plants was studied under screen-house conditions. Rate of nematode build up (P_f/P_i) was negatively correlated with the progressive increase in nematode inoculum levels. The percentage reduction in growth parameters, rice grain yield and the amount of total and reducing sugars were markedly affected showing a negative correlation with the tested inocula. The conspicuous reductions of plant growth, yield and total and reducing sugar contents were obtained by using 1000 and 10,000 nematodes per pot. The inoculum level of 1000 nematodes per pot was identified as critical population at which control programme must be started.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Mahmoud M. Ahmed Youssef

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Hirschmanniella oryzae	Rice (Oryza)