Environment Canada has issued frost advisories for most corn growing areas of the province for the nights of September 18 to 20 which are expected to be near or slightly below freezing (Figure 1). This is earlier than we typically observe first frosts, earlier than our long-term season end dates (Table 1) and much lower […]
Co-written by Joanna Follings, Cereal Specialist Should you use 2,4-D to emerged wheat in the fall to control weeds? The short answer is no. First, the label clearly states under the “Application Timing” section: “Do not apply to seedling winter cereals in the fall.” Second, there are other labelled and less injurious herbicide options that provide […]
This week’s update investigates the causes of purple wheat leaves, how we should manage herbicide applications during periods of cold air temperatures and an update on corn planting progress in the province with a refresher on planting depth. Tell a friend about the OMAFRA field crop update and subscribe to the podcast on iTunes or Soundcloud. [iframe]<iframe width=”100%” […]
co-authors: Dr. Clarence Swanton and Dr. Francois Tardif You may be faced with a scenario where there is an abundance of weeds at or near the maximum leaf-stage for effective control, yet the soybean crop is not at the growth stage specified on the product label. As a producer or consultant, do you focus on […]
I took the above video in 2010 when a lot of corn was planted in mid April and had emerged nicely only to be hit with a frost in May. Although the injury looked bad at the time, because the growing point was below the ground the crop made a complete recovery and 2010 saw […]
Below are examples of corn and soybean injury demonstrated at the FarmSmart field expo, July 12, Elora Research Station (University of Guelph) Scenario 1: Just this past spring, I had contact with a producer who had accidentally applied Guardian Plus (glyphosate + chlorimuron + flumioxazin) post emergent to his glyphosate tolerant soybeans. This mistake is […]
Here is a summary of herbicide injury scenarios in soybeans (glyphosate tolerant), white beans, kidney beans and adzuki beans showcased at the South West Crop Diagnostic Days in Ridgetown on July 6th and 7th, 2011. Scenario 1: Sandea (halosulfuron) is currently not registered in Ontario. Above is a post-emergent application of the 70 g ai/ha […]
Above average precipitation in the spring of 2011 has illustrated for many, areas within their fields that are slower to drain and even prone to have standing water (see below). Certain herbicides are at greater risk of causing crop injury in areas where there is standing water. The reasons are two fold. First, the plants […]