Integrated Weed Management in Rice

Integrated Weed Management (IWM) in Rice 

Technology Profile 

The IWM package developed, recommended, demonstrated and implemented by the farmers included 

  • High yielding high zinc medium duration variety DRRDhan 45.
  • Adoption of recommended seed rate of 30kg/ha.
  • Drum seeding under puddle condition/ transplanting.
  • Pre-sowing herbicide application of Glyphophate @2.5 to 5 l/ha in the main field 15 days before field preparation for drum seeder sowing.Application of penoxsulam+cyhalotofop butyl @2.5 l/ha.at tillering stage to control second flush of broadspectrum weed flora
  • Application of pyrozosulfuron ethyl @ 200gm/ha within 3 days of sowing.Application of penoxsulam+cyhalotofop butyl @2.5 l/ha.at tillering stage to control second flush of broadspectrum weed flora.
  • Top dressing nitrogen only after weeding operation.
  • Need based application of plant protection chemicals

Context 

Need – Due to labor scarcity, high labor wages and non availability at the critical stages 

Existing practices- Majority of the rice farmers practice manual hand weeding 

Potential losses : Expenditure on manual hand weeding is nearly double the expenditure on IWM Areas: In majority of the rice growing areas in Telangana and Andhrapradesh 

Empirical Evidences 

Demonstration yields and incomes

  • by reduced cost of cultivation with Opportunity costs with better weed management
  • by way of increasing income by improving productivity
  • Table 4:  IWM in Farmers field Demonstration for increasing income 
Location Expenditure Yield t/ha Additional Benefit (Rs/ha)
IWM Farmers Practice IWM Farmers Practice
Puppalaguda Rangareddy Dist, Telangana State. 4,342 8,975 6.96 6.13 14,834
Nagapur & Rajanpet, Medak Dist. Telangana State. 5,837 10,875 6.68 6.10 12,563
Amrad, Madanpalle Thanda & Banapoor, Nizamabad Dist. Telangana State. 6,600 11,575 6.82 5.98 16,396

  

 

 

 

 

Practical utility/Scalability 

  • Demonstrations were successful and other rice farmers in the Demo villages are asking for provision of technology and inputs.
  • Progressive rice farmers are practicing IWM successfully
  • The farmers who understood the benefits of the technology are not going back to manual hand weeding.

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