This information was summarized from a May 8 teleconference with ISU Extension field specialists in crops. Farmers in most areas of the state have planted more than 95 percent of their corn acres. Most corn is emerged. Scattered rains of up to an inch occurred across the state during the early morning of May 8.
Many cornfields have large infestations of corn flea beetles.
Insecticide treatment of some fields has occurred during the past week, especially in the southern two-thirds of the state. Bean leaf beetles are feeding on newly emerged soybean plants. See article on pages 71-72 for threshold and treatment information. Spraying has occurred in some alfalfa fields that are at threshold levels for alfalfa weevils. Other fields have been cut to take care of the alfalfa weevil population.