Canola Pest Control. Jim B. Davis
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1 Canola Pest Control Jim B. Davis
2 WSU Oilseed Cropping Systems Workshop Thursday Feb 2, :00 am - 5:00 pm Registration begins at 7:30 a.m. Quality Inn and Suites 700 Port Drive, Clarkston, WA $20 registration included lunch
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5 Online Information University of Idaho Brassica Breeding WSU Biofuels Website PNW Pest Management Handbooks Pacific Coast Canola Website U.S. Canola Association Website Canadian Canola Council Website Canola Encyclopedia Website
6 Before seeding
7 Weed Control Limited selection of herbicides Good agronomic practices Preplant glyphosate Good plant establishment firm seed bed, packers on drill appropriate planting dates Competitive stand moderate seeding rate good insect control
8 Herbicide-Resistant Canola Roundup Ready Canola High yielding spring varieties Broad spectrum weed control Liberty Link High yielding varieties Alternate mode of action Possibly weak on some grasses tank mix with grass herbicide
9 Herbicide-Resistant Canola Clearfield Canola fewer plant back restrictions tolerant to imidazolinone herbicides often cross-tolerant to sulfonylurea herbicides non-gmo very common mode of action (Group 2) overuse increases chance of resistant weeds
10 Traditional Weed Control Preplant, Incorporated Sonolan 10G or HFP (ethalfluralin) Treflan TR-10, Triflurex HFP (trifluralin) Postemergence Grassy Weeds Select 2EC (clethodim) Assure II, Targa (quizalofop P-ethyl) Poast (sethoxydim) Postemergence Canada Thistle Stinger, Clopyr Ag (clopyralid)
11 Flea Beetle Crucifer Flea Beetle Striped Flea Beetle Hop Flea Beetle
12 Flea Beetle Seed Treatments Helix Xtra/Cruiser 5FS Prosper 400 Helix Vibrance Prosper Evergol
13 Winter Canola, fall
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16 Grasshoppers Can be a problem in new winter canola stands in the late summer. Scout your fields regularly...
17 Foliar Insecticides lambda-cyhalothrin (Warrior ) bifenthrin (Capture 2EC ) zeta-cypermethrin (Mustang Maxx ) chlorantraniliprole,l-cyhalothrin (Besiege) deltamethrin (Battalion 0.2 EC...) gamma-cyhalothrin (Declare...) flonicamid (Beleaf 50 SG aphidicide) sulfoxaflor (Transform WG aphidicide)
18 Fall-applied Insecticide Efficacy None Insecticide Treatment Seed Treatment Foliar to Seed & Foliar Control 1.21 c 5.31 b 5.69 b 7.68 a lbs. per acre Yield 3,425 3,424 3,451 3,348
19 Year Fall-applied Insecticide Effect on Yield None Insecticide Treatment Seed Treatment Foliar Seed & Foliar lbs. per acre ,425 3,424 3,451 3, ,276 4,499 4,143 3, ,503 1,592 1,648 1, ,251 a 1,474 ab 1,666 b 1,676 b
20 Rhizoctonia Stem and Root Rot Caused by Rhizoctonia solani AG 2-1 (different that the wheat race) -Damping-off (seedlings do not emerge) -Wirestem (stem girdling in young seedlings) -Root rot
21 Wirestem
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24 Rhizoctonia Control Worst in fallow-planted winter canola? Crop rotation? Canola race harbored by other crops. New seed treatments (with insecticides) Prosper Evergol Helix Vibrance
25 Blackleg Caused by a seed borne fungus. Leptosphaeria maculans aka Phoma lingam Once it is established, can spread by splash or airborne spores. Survives in crop residue, volunteers and weeds for years.
26 Blackleg Life Cycle
27 Blackleg Symptoms
28 Blackleg Management Prevention - Required by Idaho Law. Start with disease-free, certified seed. (Phyto-sanitary certificate required for seed imported to Idaho.) Use fungicidal seed treatments.
29 Blackleg Management Tillage - bury residue Crop rotation - 3 years between canola or any mustard family crop. Includes cover crops - turnips, radish, mustards, etc.
30 Blackleg Management -Use resistant cultivars. -Foliar fungicides can reduce in-crop spread when present. Tilt (3), Quadris (11), Quilt (3+11), Headline (11), Priaxor Xemium (7+11), Approach (11), Proline 480 (3)
31 Winter Canola, spring Weed control Disease control Insect control
32 Blackleg Life Cycle
33 Blackleg Management - Foliar fungicides can reduce in-crop spread. - Protection from new infection only. - Yield loss? Tilt (3), Quadris (11), Quilt (3+11), Headline (11), Priaxor Xemium (7+11), Approach (11), Proline 480 (3)
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35 Cabbage Seedpod Weevil
36 Cabbage Seedpod Weevil Primarily a winter canola pest. Threshold is 3 to 4 weevils per 180 o sweep.
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