Once again illustrating the importance of crop rotation, researchers at Iowa State University have discovered resistance to Cry34/35Ab1, which may be present in Herculex or Optimum corn traits.
With more resistance to Bt corn occurring, Iowa State University Extension recommends growers develop a long-term integrated pest management approach for corn rootworm.
The EPA has unveiled new requirements for seed-corn manufacturers as the agency addresses growing concern over rootworm resistance to single-trait Bt corn products.
Corn that contains proteins that protect it from insect damage has been grown in the U.S. since the mid-1990s. Known as Bt corn, because the proteins are derived from a bacterium called Bacillus thuringiensis, these plants have been widely grown by farmers.
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Francois and Samantha Naude detail their unique closing wheel from FigTri Steel Products & Engineering, designed for the South African climate where compaction can be a real issue in the arid environment.
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