. Agri-news. Agriculture. June 10,2002 - page 2 • Parkland Laboratories 5410 Gaetz Avenue Phone: (403) 342-0404 Red Deer, Alberta T4N 4B7 • Precision Seed Testing Box 210 Phone: (403) 354-2259/1-800-379-4804 Beaverlodge, Alberta T0H 0C0 Contact: Billy Witbeck ShaffeekAli (403) 782-4641 (780) 422-4909 Growth staging critical to weed control in field pea crops Spraying of weeds in field pea crops is, or soon will be, under way in many parts of the province. There are number of factors to consider when spraying field peas. The most over looked one, is determining the growth stage of the crop to s
. Agri-news. Agriculture. June 10,2002 - page 2 • Parkland Laboratories 5410 Gaetz Avenue Phone: (403) 342-0404 Red Deer, Alberta T4N 4B7 • Precision Seed Testing Box 210 Phone: (403) 354-2259/1-800-379-4804 Beaverlodge, Alberta T0H 0C0 Contact: Billy Witbeck ShaffeekAli (403) 782-4641 (780) 422-4909 Growth staging critical to weed control in field pea crops Spraying of weeds in field pea crops is, or soon will be, under way in many parts of the province. There are number of factors to consider when spraying field peas. The most over looked one, is determining the growth stage of the crop to spray at. Although field pea crops have been grown in Alberta for over 15 years, there are still farmers and agronomists alike who don't know how to properly stage field pea and this is critical for crop safety and optimum weed control. "Plant height, mistakenly, is often used to determine growth stage of the crop but it is a poor indicator since the distance between leaf pairs, sometimes referred to as nodes, varies between types, varieties and with growing conditions," says Mark Olson, extension agronomist with Alberta Agriculture, Food and Rural Development's Pulse and Oilseeds Unit, Edmonton. "Under dry conditions, field pea crops can be quite. advanced in their growth stage but short in height. As well, normal leaf types will have a greater distance between leaf pairs versus the semi leafless types. This means that at the same height the two field pea types or varieties could be at two totally different growth ; When determining growth stage, farmers need to know that the first leaves seen soon after emergence of the crop are called scale leaves and are not to be counted. These leaves can be distinguished from the true leaves in that scale leaves are small, pointy and close to the stem. When crop scouting, be sure to check at least a half dozen or more stops in the field to get an idea of the average growth stage. Spraying field peas early, ar
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