Cpllection and Database Management of Red Weedy Rice Characteristios in Thailand

Abstract

Red weedy rice (weedy rice with red pericarp) is a noxious weed in rice farmers; field in Thailand.  Survey and collection of farmers rice yield were conducted from four different regions of Thailand namely the Central, Northest and South.  Seed quality and the level of red weedy rice contamintion of 858 rice samples were determined.  The red weedy rice samples were grown and studied on growth development and agricultural characteristice.  Database management of red weedy rice in Thailand had made using of File Maker Procarried out in Pathumthani Rice Research Centre during October 2003-2005.  It was found that the rice samples from teh central region was contaminated with 5.59 , 16.45 , 12.17 and 65.79% of the total samples in the level of 0, 0.01-0.10, 0.11-0.20 and more than 0.20% respectively.  The rice samples from the northern region was contaminated with 15.45, 41.82, 14.55 and 28.18% of the total samples in the above level respectively, and from the northeastern region was contaminated with 31.44, 24.36, 5.95 and 38.24% of the total samples in the above level respectively.  There was the variation in stem, leaf and grain of red weedy rice.  Thee was a diffeence in height, shattering (moderate to high), awn (absent to fully awned).  Moreover, it was (absent to fully awned).  Moreover, it was found that the type  of most red weedy rice was the same as cultivated rice which is Oryza satival L.  The anylose content of red weedy rice samples form the North and the South were in the range of 15.87-26.11% and 16.72-23.54% respectively.  All information of 825 red weedy rice samples were recorded in Microsoft excel and database management, was sone in File Maker Pro 5.0 programme.  Futhermore, the herbarium of red weedy rice samples in each area has been collected in order to be a reference for farmers, researchers and anyone who wishes to study.