In the Pioneer Agronomy Update, Pioneer Field Agronomist Clyde Tiffany provided information on western and northern corn rootworm. “The western is yellow and black in coloring when you look at the beetle; northerns are green in coloring,” said Tiffany. The two species act differently with the northern corn rootworm can go into extended diapause. “Half of the northerns will hatch in the following soybean crop in a rotation and half of the eggs will hatch two years later when you come back to corn; rotation doesn’t always work with northerns.” Heavy populations of northern corn rootworm have been reported this season. At this time of the year, a network of yellow sticky traps are posted to identify beetle feeding. A YouTube interview with Tiffany is also available on Iron Deficiency Chlorosis.
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