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Indigenous Weed Control Methods in Rice

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1.    Before sowing, farmers sieve rice seeds in order to separate  the seed of weeds. Since most of the weed seeds are smaller than  rice seeds, they are filtered   out in sieves. This is prevalent in  Arunachal Pradesh. Reported by  Ranjay. K. Singh(2003)
2.    Treatment of paddy seeds in diluted biogas slurry for 12 hours increase resistance  of seedlings  to pests and diseases.  This is practiced in Tamil Nadu. Reported by  Iyyappan(1997)
3.    Control of wild rice by growing purple riceThis practice is adopted to control  the wild rice in rice field by growing  the purple colored rice variety R –575. The practice is followed  by farmer  in Dangu Kummi Khuda and Karni villages of Bath and Gopalpur  development blocks  in Mandi district  of Himachal Pradesh. The wild rice is locally called  nirsan is a major problem in upland  rice growing  areas. Being identical to rice plants  in  foliage, it is difficult  to distinguish  between  wild and  cultivated rice. The wild  rice matures  much earlier  than the  cultivated rice and shatters its grain in the field. Due to this, it  becomes  practically  impossible  to eradicate  this weed  from rice field.  Since, this weed is of same species  as that of cultivated rice, no herbicide  can be  used to control this weed. Farmers of the mentioned areas where this  problem  exists  adopted  a practice of growing   purple  colored  rice variety (R-575) in the  infested fields. This variety of rice has purple colored foliage, which is  distinctly  different  from wild rice. During the weeding  operation, farmers remove green colored  wild rice from their fields, thus  eradicating this weed  from their field.  The farmers are practicing  this for the last 45 years. Reported by  S. K. Sharma(2003)
4.    Weed control in rice  by using common salt.Common salt is dissolved  in water and sprayed  in rice fields for controlling  major  weeds. This practice  is being  used by 40 to 50%  farmers of Makarbili village in  Nawadpada district of Orissa with 60% effectiveness in controlling weeds. Reported by  Sarbani Das(2003)
 

File Courtesy: 
Indigenous Technical Knowledge in Rice Cultivation. P. Muthuraman and Shaik. N. Meera
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