| dc.description | Damage to field corn by western corn rootworm, Diabrotica virgifera LeConte, was discovered for the first time in the state near Colfax, North Dakota in July, 1970. Adult western corn root worm beetles were known to be in North Dakota for several years prior to 1970; however, larval damage had not been detected during previous years. Several granular insecticides were registered for western corn root worm control. Control trials in 1971 using registered and potential chemicals to determine how well these chemicals would perform under soil and climatic conditions in North Dakota was presented. | |
