Analysing The Distribution Characteristics Of Resistant Weeds Which Were Growed In Paddy Fields Of Tumen City

The result of investigating the main rice planting area between 2012 and 2014 Of tumen city indicates that Echinochloa crusgalli(L.)Beauv.which is resistant to Invasive Leersia Orygoides.L.(SW).which is resistant to Quinclorac,cyhalofop-butyl and penoxsulam are found in paddy rice;Weedy rice Linnaeus which is resistant to herbicide used commonly are also found in paddy rice.which is resistant to Sulfonylurea Invasive Sagittaria sagittifolia Monochoria korsakowi.The results which studies the effect of different herbicides on resistant weeds mentioned above show that herbicides which has good prevention effects on sulfonylurea-resistant herbicides such as Sagittaria,Monochoria korsakowii are prometryn,bentazon,MCPA sodium and so on;Amide herbicides such as pretilachlor should be used to prevent the Echinochloa phyllopogon(stapf)Koss of quinclorac-resistant herbicides in the early stage of its growth or penoxsulam,cyhalofop-butyl and ordam should be used in the middle of its growth.Simultaneously farmers are suggested that mixed herbicides should be used and different kinds of herbicides should be used interchangeably.