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Integrated Weed Management (IWM) in Rice

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Technology 11: 

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 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 Rs/ha

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. 

Technology / Concept developed by Dr. B. Sreedevi and team

Related Terms: EISProduction Know How
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