Adult Management of Corn Rootworms
Objectives
- Reduce soil insecticide use and area treated.
- Maintain yields.
- Reduce pest populations.
Methods
- Semiochemical bait (includes tiny amounts of carbaryl, fipronil and red dye being tested as replacements)
- semiochemical traps and monitoring
- transgenic corn possible (larvae)
Extent of Implementation
Fiscal Years 1996-2000
- 1997-5 sites (South Dakota, Iowa, Kansas, Illinois/Indiana), 143 growers, 24,580 acres
- Four sites in Texas added, 24 growers, 10,000 acres
- Total of 34,580 acres and 167 growers
Results to Date
- In general, all field sites have a two to three fold reduction in adult rootworm populations (1997-98).
- In 1999 adult populations were higher than expected, but in all instances less than 10% of all fields in each area had economic damage from larval feeding in 1999.
- Substantial economic root protection with the bait method. No impact on natural enemies.
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