Yield estimates are only as accurate as the field area they represent. Repeat counts at multiple locations to increase your accuracy. Factors such as water availability, insects, diseases and weeds can also affect seed fill and final yields. As the corn plants mature and get closer to black layer, these stressors have less of an…
Harvest maturity (occurring around 25% grain moisture) usually refers to the point at which harvest and mechanical loss are at a minimum. Before this happens, corn develops a black layer which is located at the base of the kernel opposite to the embryo. Typically this occurs approximately 55-65 days after silking. Another way to estimate…
As corn began to tassel in the beginning of August, many fields contained Northern Corn Leaf Blight (NCLB) lesions. As of today, most fields are showing minimal signs of progression; however, heavy dews, high humidity and moderate temperatures are ideal for disease progression. In worst cases, the entire leaf will become blighted. Early infections with…
Many parts of Ontario experience significant damage to corn due to birds. Often, birds will feed on developing corn ears immediately following pollination and during the early stages of grain fill. Birds are very attracted to the developing soft kernels as a food source. Large flocks of birds can cause an incredible amount of damage…
The 2014 growing season started late for most and has not been a particularly warm season. On a year where the marketing of a corn crop has taken a turn south, protecting the bushels you have or potentially trying to create extra bushels is very important. Why Would I Spray at Tasseling Time? (Silking to…
Understanding what goes on within a corn plant is important to your final yield. In order to track your corn’s growth progress, we use a standard Developmental Stage Key. The Vegetative Stage of corn is noted by the letter V. As each leaf unfurls from the whorl, a collar is formed. These collars are numbered…
I have heard and spoken about many positives around strip till, but wanted to share a big negative that I saw in spots this spring. One of the goals of strip till is to create a seed bed in a zone while leaving the majority of the soil untouched. A late, wet fall last year…
Weed management in several areas of the province has been challenging. Weather has prevented herbicides from being applied and from being activated. Early weed control remains critical for maximum yield, despite the weather. Dr. Swanton at the University of Guelph has shown that corn plants have the ability to “see” weeds. To compete with weed…
Despite a lot of variability in development, there are corn fields that are now in the application window for an early fungicide application. The recommendation for the early application is from 7 to 10 leaf corn (V5 to V8). One of the main drivers for a fungicide application now is the thought that since a…
Some corn fields where corn has emerged, the coleoptile and first leaf appear pale yellow to gray or transparent. The weather over the last few weeks has been cool, slowing crop development. Pale or transparent corn leaves are often a result of cool, wet conditions. Plant metabolism slows, resulting in an inability to absorb nutrients…