Herbicide Residue Drift Injury - Canola Council of Canada

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58 Effects of Foliar-Applied Group 5 Herbicides Effects of Foliar-Applied Group 5 Herbicides The most common Group 5 herbicide that may cause herbicide injury to canola through drift is Sencor, a metribuzin. This group also includes the atrazine family. Group 5 Herbicides Chemical Family Active Ingredient Found In* Phenyl-carbamates Desmedipham Betamix, Betamix ß Phenmedipham Betamix, Betamix ß Triazines Atrazine AAtrex Liquid 480, Atrazine, Converge 480, Frontier Max Plus, Laddok, Liberty AT, Lumax, Marksman, Primextra II Magnum, Prospero Simazine Princip Nine-T, Simazine 480 Triazinones Hexazinone Velpar DF, Velpar L Metribuzin Pyrazon Axiom DF, Lexone DF, Sencor, Tricor 75 DF Pyramin DF, Pyramin FL Uracils Bromacil Calmix Pellets, Hyvar X/X-L, Krovar I Always confirm active ingredients and recropping restrictions on product labels prior to use. • Initial symptoms of Group 5 activity include rapid chlorosis and necrosis at the leaf edges, and inter-veinal chlorosis. • The leaves rapidly dessicate and develop a burned-off appearance.
Effects of Foliar-Applied Group 6 Herbicides Common Group 6 herbicides that may cause drift damage to canola include Viper, and any of the pre-formulated herbicides containing bromoxynil. Group 6 Herbicides Chemical Family Active Ingredient Found In: Benzthiadiazoles Bentazon Basagran, Basagran Forte, Laddok, Viper Nitriles Bromoxynil Achieve Liquid Gold, Approve, Axial iPak, Badge, Benchmark, Bromotril, Brotex 240, Buctril M, Horizon BTM, Infinity, Koril 235, Leader, Logic M, Mextrol 450, Pardner, Signal D, Signal M, Thrasher, Thumper, Titanium, Tundra, Velocity m3 Always confirm active ingredients and recropping restrictions on product labels prior to use. • Typical symptoms include a general discoloration and yellowing in two to four days. • The plants brown completely and shrivel and die in one to two weeks. Photos by F.A. Holm Recognizing Herbicide Residue and Drift Injury in Canola 59
Page 1 and 2:
Recognizing Herbicide Residue Drift
Page 3 and 4:
Foliar Herbicide Injury Introductio
Page 5 and 6:
Recropping Restrictions for Residua
Page 7 and 8: Herbicide Clearfield Canola Non-Cle
Page 9 and 10: Table 1: Soil factors that effect t
Page 11 and 12: Carryover can have considerable fie
Page 13 and 14: In this case, cupping was caused by
Page 15 and 16: These plants also exhibit symptoms
Page 17 and 18: An unaffected (left) and severely a
Page 19 and 20: An unaffected plant (left) and one
Page 21 and 22: Severe Symptoms At the 3-leaf stage
Page 23 and 24: Severe Symptoms Leaf purpling and c
Page 25 and 26: Severe Symptoms The combination of
Page 27 and 28: Recognizing Herbicide Residue and D
Page 29 and 30: Symptoms observed at this stage are
Page 31 and 32: Chemical Family Active Ingredient F
Page 33 and 34: Conclusion Herbicide carryover can
Page 35 and 36: Recognizing Herbicide Residue and D
Page 37 and 38: OBJECTIVES AND METHODS This section
Page 41 and 42: Sulfosulfuron symptoms: 2% of an 11
Page 49 and 50: Imazethapyr and Imazamox symptoms:
Page 51 and 52: Imazethapyr and Imazamox symptoms:
Page 55 and 56: 2,4-D Ester 600 symptoms: 5% of a 2
Page 57: 2,4-D Ester 600 symptoms: 10% of a
Page 61 and 62: Effects of Foliar-Applied Group 9 G
Page 63 and 64: Effects of Foliar-Applied Group 14
Page 66: Canola Council of Canada 400 -167 L
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Herbicide Residue Drift Injury - Canola Council of Canada

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