Frost in Corn and Soybeans – Harvest concerns

Many reports of frost damage in corn and soybeans with last weekend’s cold temperatures. Two nights of minus 2 degrees Celsius with damage down to the ear leaf in many corn fields. All is not lost. We will have harvest options but be aware that this stress will cause issues with dry down, test weight, and stalk rots (due to the higher than expected stress on the plant to finish). Here are some links to help get the crop harvested this fall.


Soybeans and Grain Corn.

Greg Stewarts Comments

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Hot weather easing corn maturity concerns.

Summer arrived in September and it appears that much of the corn is going to make it or is it? A tour last week through Michigan and upper mid west US revealed that many fields are just barely starting to dent which is similar to what we are seeing in Ontario. In many plots only the early hybrids are dented and many hybrids still need 21 – 28 days to fully mature. You have probably done the calculation in your head and realized this is still October time frame. We will still need to mid October frost free to mature most of the Ontario corn. Also, realize that there will be fields that do not make it. The early planted fields are generally (if you planted within normal CHU range for your area) are going to mature as long as an abnormal frost event does not occur.
Late planted fields are an issue. If you planted late day hybrids in later half of May, black layer is going to be difficult to achieve within a normal frost date of the first week of October (but if we get the weather of 2005 when October was frost free, disregard my comments). But not all is lost as even if we get a frost as long as the corn matures to half milk line we can still achieve approx. 90% of the expected yield.
Check your fields – if they are fully dented – smile, if not be prepared for light test weight, wet corn at reduced yields.

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