By Kaeley Kindrachuk, AT, Crops Extension Specialist, Outlook, and Joel Peru, PAg, Irrigation Agrologist, Outlook
Now that seeding is complete, the Irrigation Crop Diversification Corporation (ICDC) research and demonstration plots look fantastic.
For this week’s crop walk, we had a chance to look at several different trials. We briefly stopped at a study that will demonstrate control options for Roundup Ready canola in Roundup Ready soybeans. (Photo 1). There will be four different treatments between herbicides and timings. This is becoming a wider issue now that soybeans are being grown in most areas of the province. Once treatments have been applied, we will have an update as to what worked best.
ICDC is also conducting a hemp variety trial comparing the grain yield of 10 different varieties.
Our main stop this crop walk was in the corn plots, where we described the different ways to stage corn. This was to address frequent producer inquiries about what method should be used for different herbicide products. There are four different ways to stage corn for herbicide timing: the corn height method, the leaf tip method, the leaf over method and the leaf collar method. For the corn height method, the measurement is taken from the ground level to the arch of the uppermost leaf with the tip pointing down. For the leaf tip method, leaf tips are counted, including any leaf tip that has emerged from the whorl. For the leaf over method, count the number of leaves (starting at the lowest leaf) to the last leaf that is arched over (tip pointing down). The leaf collar method counts the number of leaves with visible collars and is recorded as V”x”. It is important to remember that each herbicide will specify crop staging, and should also specify which method to use when staging the crop (Photo 2). This can be found in the Guide to Crop Protection, or by checking the label.
With corn, controlling weeds early on is critical for the success of the crop. ICDC has a grain and silage corn variety demonstration, and the Prairie Agricultural Machinery Institute (PAMI) has a larger study involving two different silage corn varieties, with three different seeding rates combined with three different nitrogen rates.
ICDC also has a number of trials this year for cereal crops, including: a high-yielding trial involving multiple classes of wheat; a CWRS variety trial; a durum variety trial; an SWS wheat variety trial; and the ICDC wheat trial, which includes all varieties in all classes that perform best under irrigation. The data from these trials can be found in the Saskatchewan Seed Guide and in ICDC’s Crop Varieties for Irrigation.
The last stop was a quick look at the Canola Performance Trials (CPT) program that demonstrates registered varieties available to producers, tested by third-party groups. The trials contain canola varieties from all three herbicide-resistant classes (Photo 3). The data is compiled every year and can be found in the Saskatchewan Seed Guide and in the Canola Variety Selection Guide distributed by the Canola Council of Canada and SaskCanola Development Commission.
For more information, follow Saskatchewan Agriculture on Twitter @SK_Agriculture or ICDC on Twitter @ICDC_SK.