Ontario crops are progressing towards maturity, confirms the Grain Farmers of Ontario’s weekly update posted on August 31.
Corn crops are transitioning notably, with many moving from the dough stage (R4) to the dent stage (R5). In southwestern Ontario, the dent stage (R5) is already evident, especially for later-pollinated hybrids that are just entering the early dent phase. As September unfolds, the corn plant's milk line will shift rapidly as it nears physiological maturity, also known as the black layer or R6 stage.
Concern is growing due to cooler, wet conditions potentially delaying crop progress in southern Ontario. Reports suggest a deficit in crop heat units (CHU) compared to the previous year. If these weather patterns persist into September, there could be delays in harvesting, possibly resulting in a wetter grain.
Tar spot has been detected in an additional county, making its presence known in six counties. Even sprayed fields aren't exempt from tar spot, demonstrating the disease's foothold in Ontario. Fortunately, if the disease develops late, as is currently happening, its impact on yield may be minimal. However, it might affect the standability and test weight of crops.
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