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White Mold Mushrooms Show Up, Xiao-Bing Yang, Shrishail S. Navi, Xun Li Jul 2010

White Mold Mushrooms Show Up, Xiao-Bing Yang, Shrishail S. Navi, Xun Li

Integrated Crop Management News

Over the last 10 days the weather was favorable for the production of soybean white mold mushrooms in Iowa. Yesterday we visited fields near Clear Lake in north central Iowa with crop consultant Dan Muff and found abundant white mold mushrooms in a continuous soybean field, which had a closed canopy with wonderful growth. The density of the mushrooms was very high, 3 apothecia/square foot, and soybean plants are likely to be infected. The early showing in such a large number in this field was due to early planting, good growth and a higher number of sclerotia from last ...


Scout For Early Summer Diseases, Xiao-Bing Yang May 2010

Scout For Early Summer Diseases, Xiao-Bing Yang

Integrated Crop Management News

Recent growing seasons have not been typical ones, and this season seems to follow this pattern. Each unusual season has unique disease problems. This year, early planted soybeans are in flowering stage and we are starting to see a different set of issues. There are three things to look for when scouting these fields.


Risk Of Mycotoxins Associated With Hail Damaged Corn, Alison E. Robertson, Gary P. Munkvold Aug 2009

Risk Of Mycotoxins Associated With Hail Damaged Corn, Alison E. Robertson, Gary P. Munkvold

Integrated Crop Management News

Hail storms that occurred recently across the state have caused considerable damage to corn crops that will likely result in reduced yields. Bruises on stalks and ear husks may allow pathogen entrance that could result in stalk and ear rots, and consequently stalk and grain quality issues. In particular, there may be increased risk of mycotoxin contamination on grain.


More On Soybean White Mold This Year, Xiao-Bing Yang, Shrishail S. Navi Aug 2009

More On Soybean White Mold This Year, Xiao-Bing Yang, Shrishail S. Navi

Integrated Crop Management News

Soybean white mold has been a production problem for soybean producers since early 1990s. White mold outbreaks often occur in even years due to crop rotations, with rare severe occurrences in odd years. Iowa’s cool, wet summer has increased the white mold risk for some growers in eastern Iowa – even though it is an odd year. Extension field agronomist Virgil Schmitt first reported the occurrence of white mold in east central Iowa and Jim Fawcett, northeast Iowa field agronomist, has received a report of severe white mold in a 60-acre field.


Managing White Mold At This Stage Of Development, Virgil L. Schmitt, Daren S. Mueller Aug 2009

Managing White Mold At This Stage Of Development, Virgil L. Schmitt, Daren S. Mueller

Integrated Crop Management News

White mold has become evident in soybeans during the last two weeks, especially in eastern Iowa. Although infection occurred shortly after the beginning of flowering in late June and early July, the characteristic white myecial growth on infected plants has only become apparent the past two weeks. Really the only good news about this disease is that it does not have too much of a secondary disease cycle. In other words the disease itself is no longer spreading or is spreading one plant at a time.