| dc.description | The control of the European Corn Borer by natural means by parasites in lieu of insecticides is the focus of this article. Several species of insects parasitize the European corn borer, Ostrinia nubilalis. It was suggested that a combination of parasites was responsible for control in the Orient in 1949. In the summer of 1951, three species of corn borer parasites were released in southeastern
North Dakota. The three parasites which were released were L. grisescens, and the wasps Chelonus annulipes Wesm. and Macrocentrus gifuensis Ashm. None became established. Though not released in North Dakota, S. viridula recovered and appeared to have established itself in several southeastern counties. A study of parasite releases from 1964-69, in the state are discussed. The study found that only The wasp Sympiesis viridula (Thoms.) was the only parasite which appeared consistently It was found only in the southeastern corner of North Dakota. | |
