Add all live larvae from the 25 plants and divide by 25. Lee County Master Corn and Soybean Program Lee County corn and soybean growers who would like to enter the Iowa State University Master Growers program should contact the Lee County Extension Service. The conservation and no-till divisions for both corn and soybeans require that a residue application be completed. Recently we have had a few calls on wheat heads that are dying prematurely. Depending on how early it happens, yield loss can be moderate or severe.
Many different factors can cause white heads.
In many cases, the cause of the white heads can be diagnosed by the pattern of symptoms within the plant. In contrast, sharp eyespot girdles the stem, so individual stems are killed along with the heads. Likewise, the field pattern can be very helpful. Sometimes additional features help confirm the diagnosis. For instance, root rot causes blackened roots and blackened stem bases.