Variety ratings for corn and soybean

Gray leaf spot severity ratings from the 1998 Iowa Crop Performance Test are now available and include data from seven locations for all hybrids entered in Districts 5, 6, and 7, covering southern and east central Iowa. Two- and 3-year averages are included for hybrids that have been entered since 1996 or 1997. The results will be available in printed form, as Pm-660-GLS, later this month. Gray leaf spot results should be used in conjunction with yield data from the Crop Performance Test to make the best choices for hybrids where gray leaf spot occurs.

Results also are available for the 1998 variety trials of public and private soybean varieties bred for resistance to soybean cyst nematode (SCN). Each year, ISU conducts these variety tests to assess the performance of SCN-resistant soybean varieties and the effects of the varieties on SCN population densities.

A copy of the report (ISU Extension publication IPM-52) can be obtained by contacting your local county extension office or the ISU Extension Distribution Center at 515-294-5247. The report also is posted on the ISU Quick SCN Facts home page.

This article originally appeared on page 5 of the IC-482 (1) -- January 18, 1999 issue.

Updated 01/17/1999 - 1:00pm