Some factors influencing populations of the European corn borer, Ostrinia nubilalis (Hubner) in the north central states: Resistance of corn, time of planting and weather conditions Part II, 1958-1962

A cooperative project was conducted by the agricultural experiment stations of Iowa, Minnesota and Ohio and the U. S. Department of Agriculture to study the effects of weather, planting date and resistant hybrids as factors influencing populations of the European com borer, Ostrinia nubilalis (Hübner). Identical studies were carried out at Ankeny, Iowa; Waseca, Minnesota; and Wooster, Ohio, during a 10-year period, 1953-1962. The first 4 years of the study (1953-56) were reported by Everett et al. (1958). The work reported herein is a companion bulletin to the Everett et al. (1958) publication and deals with the results of experiments conducted during 1958-1962. The experimental design was a randomized block, split plot with five replications. The whole plot treatments were four hybrid-planting date combinations consisting of early- or late-planting dates and susceptible or resistant hybrids. The subplot treatments consisted of a factorial arrangement of all possible combinations of three levels of infestation (zero, natural and natural + 3 egg masses) by first brood and the same three levels of infestation by second-brood borers. Temperature and rainfall records were kept at each of the three stations. Borer population and injury to the plant were recorded at the end of the first brood and in the fall. Yield data were collected

2 New Species Of Corticeus From Florida And The West indies

Volume: 81Start Page: 46End Page: 5

A REVIEW OF THE GENUS LIODEMA HORN (COLEOPTERA: TENEBRIONIDAE) WITH DESCRIPTION OF A NEW SPECIES FROM COSTA RICA AND PANAMA

Volume: 100Start Page: 324End Page: 33

A new species of Neobaphion Blairdell, from Idaho (Coleoptera: Tenebrionidae)

Volume: 91Start Page: 458End Page: 46

Revision of Diaperini of America north of Mexico with notes on extralimital species (Coleoptera: Tenebrionidae)

Volume: 117Start Page: 349End Page: 45