Some of this corn will tassel this week and is on target for reaching maturity before normal frost dates. Other fields are lagging behind and are in need of some normal to above normal temperatures to speed development along. Corn that has not tasseled by July 25 is at risk of September frosts shortening the grain filling period to the point of causing significant yield and test weight reductions. Field operations are coming to a close on soybeans. A wide range in crop development exists across the region.
Manganese deficiency is also evident in some soybean fields.
Manganese symptoms appear as interveinal chlorosis, with the veins in the leaf staying distinctly green. This contrasts with other nutrient deficiencies, such as nitrogen, which are a more general yellowing. Be sure to do some detective work to determine the actual cause of your yellow soybeans, then you will be able to take the appropriate management steps to correct the problem. An Armyworm alert has been sounded. Armyworms have been reported in the Bowmanville area this past week.