Focusing on the critical period of weed control will help boost yields.
As overseas demand for Canadian pulse crops expands, the number of acres planted with the crop is anticipated to grow throughout the prairie provinces in 2024. This means that it will be critical that growers keep weeds from interfering with crop growth and yield.
When it comes to weeds, pulses are generally poor competitors and require a long weed-free period to achieve full yield potential. Known as the critical period of weed control (CPWC), these are the critical growth stages when weeds must be effectively controlled to prevent significant yield loss.
Weeds present during these critical stages can cause yield losses greater than five percent, emphasizing the need for early weed control measures. Controlling weeds during this timeframe allows pulse crops to establish a strong and competitive stand, maximizing their potential for high yields and quality.
Late-germinating weeds, such as Russian thistle and kochia, can pose a risk of harvest issues if not adequately controlled. These competitive weeds may affect the efficiency of harvesting operations and result in contamination of the harvested crop.
Proactive weed control during the critical period is essential for managing herbicide resistance. Identifying and addressing herbicide-resistant weed populations during this time is crucial to maintain the efficacy of herbicides and prevent further resistance development.