Population dynamics of the rice root nematode Hirschmanniella oryzae on monsoon rice in Myanmar

Soil and root samples of the short crop cycle duration rice variety Yadanartoe were collected at 10-days intervals, starting at 20 days after transplanting until 20 days after harvest, from September 2008 until January 2009, to study the population dynamics of Hirschmanniella oryzae on (rainfed) mon...

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Bibliographic Details
Published in:Archiv für Phytopathologie und Pflanzenschutz 2013-02, Vol.46 (3), p.348-356
Main Authors: Maung, Z.T.Z, Win, P.P, Kyi, P.P, Myint, Y.Y, Waele, D. De
Format: Article
Language:English
Subjects:
clay
Clays
Crops
developmental stages
Environmental conditions
environmental factors
field study
Grain
Growth stage
Harvesting
Hirschmanniella oryzae
monsoon season
Monsoons
Nematoda
Oryza sativa
pH effects
plant growth
plant parasitic nematodes
Plant protection
population densities
Population density
Population dynamics
rain
Rainfall
rainfall, temperature
Relative humidity
rice
Roots
Sampling
Soil temperature
Soil types
tillering
Wind
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Summary:Soil and root samples of the short crop cycle duration rice variety Yadanartoe were collected at 10-days intervals, starting at 20 days after transplanting until 20 days after harvest, from September 2008 until January 2009, to study the population dynamics of Hirschmanniella oryzae on (rainfed) monsoon rice. Plant growth stages, the ambient air and soil temperature, rainfall and relative humidity during the sampling period were noted. The soil type is clay and has a pH of 5.1. In the roots, three nematode population density peaks were observed during the sampling period: at the maximum tillering stage, at the milky grain stage, and between harvest and 10 days after harvest. The highest peak (483 H. oryzae/g roots) was observed at the milky grain stage. The lowest root population density (46 H. oryzae/g roots) was found at harvesting. Population densities in the soil followed more or less the same trend as in the roots. After harvesting, the soil population density increased. During our observation, we did not find any effects of environmental conditions on the population densities of H. oryzae. However, it was found that the population dynamics of H. oryzae were influenced by the plant growth stage.
ISSN:1477-2906
0323-5408
1477-2906
DOI:10.1080/03235408.2012.740982