Presenter Information

Jon Tollefson, Iowa State University

Start Date

4-12-1991 12:00 AM

Description

A chemical-control strategy that might eliminate the need for a grower to apply a granular insecticide at planting or cultivation time is the application of a foliar spray by a commercial aerial applicator. Iowa began experimenting with the application of foliar broadcast sprays to control adult corn rootworms in 1974. In theory, if female beetle numbers can be sufficiently reduced during the egg-laying period, a damaging population of corn rootworm larvae should not develop the following season. The technology that stimulated interest in the concept was the development of a persistent formulation of carbaryl insecticide (Sevin® 4-0il). Experiments conducted during 1974-1976 demonstrated that the formulation had sufficient persistence to warrant full-scale field testing.

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Dec 4th, 12:00 AM

Adult Corn Rootworm Suppression to Prevent Oviposition

A chemical-control strategy that might eliminate the need for a grower to apply a granular insecticide at planting or cultivation time is the application of a foliar spray by a commercial aerial applicator. Iowa began experimenting with the application of foliar broadcast sprays to control adult corn rootworms in 1974. In theory, if female beetle numbers can be sufficiently reduced during the egg-laying period, a damaging population of corn rootworm larvae should not develop the following season. The technology that stimulated interest in the concept was the development of a persistent formulation of carbaryl insecticide (Sevin® 4-0il). Experiments conducted during 1974-1976 demonstrated that the formulation had sufficient persistence to warrant full-scale field testing.