Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 11231 Advancing Seed in Alberta | spring.2017 think it’s fair to say that soils are typically short of nitrogen, even in high organic matter soils. We just don’t have good clarity on how much yield loss you might expect from weevils in higher organic matter soils,” says Meers. Pea and faba bean growers should start scouting for pea leaf weevil as soon as their crop emerges and continue until the sixth node stage. Damage in a newly infested field usually occurs at the outside edges first. Watch for characteristic, crescent shaped feeding marks along the edges of newly emerged, still folded (clam leaf) pea leaves. The weevils pose a yield risk if damage is noted in 30 per cent or more of the clam leaves. Growers struggling with pea leaf weevil should develop an integrated pest manage- ment plan. In addition to seeding peas and faba beans at the correct timing and depth with insecticide-treated seeds, growers should opt to include non-host crops in their rotation, and should be fertilizing and managing disease, pests and weeds appro- priately to promote strong seedlings. According to population climax modelling conducted by Agriculture and Agri-Food Canada researcher Dr. Owen Olfert, pea leaf weevils have the potential to expand into all of Alberta pea growing areas. Though Meers expects range expan- sion to continue over the foreseeable future, he says two factors may slow it at least temporarily. First, like most insect populations, pea leaf weevil numbers can be knocked back by a cold winter. Second, newly pupated adults attempting to emerge from the soil in late July and August can be trapped underground if the soil surface is dry and hard. Therefore, dry summer conditions reduce pea leaf weevil populations in the following year. While there is little a producer can do to hold back the tide of pea leaf weevils, the first and best step to managing the insects is being informed, both about the bugs themselves and about what is occur- ring in a particular field. “Pea leaf weevils are likely here to stay,” says Meers. “The best thing producers in range expansion areas can do is to be very vigilant.” Madeleine Baerg CDC TITANIUM is an excellent choice — anywhere across the Prairies — for yield and agronomics that include a complete disease package. It’s the leading CWRS choice on acres with the potential for midge and rusts. CDC TITANIUM. Proven performance, and more, on farms across Western Canada. This is the one, available only at your CPS retail. THIS IS THE ONE Proven® Seed is a registered trademark of Crop Production Services (Canada) Inc. CPS CROP PRODUCTION SERVICES and Design is a registered trademark of Crop Production Services, Inc. 01/17-52758-1G provenseed.ca WELCOME TO THE EXCITING NEW WORLD OF PROVEN® SEED