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Integrated pest management in the rice system Incorporating new insecticides Dr. Michael Stout, LSU AgCenter Department of Entomology E-mail: mstout@agcenter.lsu.edu 11:15 to noon
Insect pests of rice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The “drivers” of pest management decisions in rice Rice water weevil Rice stink bug
Insect pests of rice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],“ Proactive” approach! “ Reactive” approach!
Adult  overwintering Larval  feeding Mating and oviposition Adult  feeding
Options for control of rice water weevils and other early-season pests ,[object Object],[object Object],[object Object],[object Object]
Is the use of seed treatments in Louisiana justified? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Q: Which of the seed treatments should you choose?
Q: Which of the seed treatments should you choose? A: it depends on which pests typically infest your fields
Spectrum of activity   Cruiser  Dermacor X-100
Spectrum of activity:  what pests do they control? Dermacor X-100 Cruiser Maxx X Rice water weevil X Rice water weevil Colaspis X Colaspis X Stem borers Stem borers Sucking pests –chinch bugs, aphids X Sucking pests –chinch bugs, aphids X Other Leps – fall armwyorm Other Leps – fall armwyorm X South American Rice Miner South American Rice Miner
You might consider using Dermacor if… ,[object Object],[object Object]
You might consider using Cruiser Maxx if… ,[object Object],[object Object]
What if you don’t use a seed treatment? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Pyrethroids act by killing adults,  thereby preventing egg-laying X
Timing of insecticide applications for weevil management ,[object Object],[object Object],[object Object],[object Object]
Apply pyrethroids when  adults / feeding scars are present and  fields are flooded A second application may be needed
Regardless of your choice of insecticides… Don’t put them in a position to fail!
Agronomic practices to minimize yield losses from weevils: ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
18% 39%
Tolerance   is dependent on plant age… Zou et al., Crop Protect. 23: 543 (2004) 0 10 20 30 40 50 60 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 No. of immatures per core, 20 daf Standardized yield Flooded 28 d after seeding Flooded 42 d after seeding
What about crawfish? ,[object Object],[object Object],[object Object]
The “drivers” of pest management decisions in rice Rice water weevil Rice stink bug
 
 
 
 
Rice Stink Bug Damage Feeding on flowers (non-filled seed ) Remove contents of developing kernels (partially-filled seed) Pecky rice and broken kernels   Photograph by Boris Castro Photograph by Boris Castro
Rice stink bug management ,[object Object],[object Object],[object Object],[object Object],[object Object]
Scouting and thresholds ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sugarcane borer
 
 
 
 
 
 
 
 
 
Stem borer management ,[object Object],[object Object],[object Object],[object Object],[object Object]
Management of Sugarcane Borer Infestations in Rice Using Selected Rates of Insecticides, Louisiana 2004

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Rice Ipm Stout

  • 1. Integrated pest management in the rice system Incorporating new insecticides Dr. Michael Stout, LSU AgCenter Department of Entomology E-mail: mstout@agcenter.lsu.edu 11:15 to noon
  • 2.
  • 3. The “drivers” of pest management decisions in rice Rice water weevil Rice stink bug
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  • 5. Adult overwintering Larval feeding Mating and oviposition Adult feeding
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  • 8. Q: Which of the seed treatments should you choose?
  • 9. Q: Which of the seed treatments should you choose? A: it depends on which pests typically infest your fields
  • 10. Spectrum of activity Cruiser Dermacor X-100
  • 11. Spectrum of activity: what pests do they control? Dermacor X-100 Cruiser Maxx X Rice water weevil X Rice water weevil Colaspis X Colaspis X Stem borers Stem borers Sucking pests –chinch bugs, aphids X Sucking pests –chinch bugs, aphids X Other Leps – fall armwyorm Other Leps – fall armwyorm X South American Rice Miner South American Rice Miner
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  • 15. Pyrethroids act by killing adults, thereby preventing egg-laying X
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  • 17. Apply pyrethroids when adults / feeding scars are present and fields are flooded A second application may be needed
  • 18. Regardless of your choice of insecticides… Don’t put them in a position to fail!
  • 19.
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  • 22. Tolerance is dependent on plant age… Zou et al., Crop Protect. 23: 543 (2004) 0 10 20 30 40 50 60 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 No. of immatures per core, 20 daf Standardized yield Flooded 28 d after seeding Flooded 42 d after seeding
  • 23.
  • 24. The “drivers” of pest management decisions in rice Rice water weevil Rice stink bug
  • 25.  
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  • 29. Rice Stink Bug Damage Feeding on flowers (non-filled seed ) Remove contents of developing kernels (partially-filled seed) Pecky rice and broken kernels Photograph by Boris Castro Photograph by Boris Castro
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  • 43. Management of Sugarcane Borer Infestations in Rice Using Selected Rates of Insecticides, Louisiana 2004