Herbicide Residue Drift Injury - Canola Council of Canada

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60 Effects of Foliar-Applied Group 7 Herbicides Effects of Foliar-Applied Group 7 Herbicides The most common Group 7 herbicide that may cause drift damage to canola is Linuron. Chemical Family Active Ingredient Found In: Ureas Diuron Diurex 80W, Karmex XP, Krovar I DF Linuron Linuron, Lorox Always confirm active ingredients and recropping restrictions on product labels prior to use. • High concentrations of drift cause interveinal yellowing of the oldest leaves with death occurring within a few days. • Lower drift concentrations result in wilting of leaves and the development of grey blotches and yellowing of leaves. Interveinal yellowing may occur if concentration is high enough. Photo by F.A. Holm
Effects of Foliar-Applied Group 9 Glyphosate (Roundup Transorb) Glyphosate was applied to non-Roundup Ready canola at 30% of the 1 L/acre rate to simulate herbicide drift. ROUNDUP TRANSORB SYMPTOMS: 30% OF 1 L/AC RATE In field studies, no damage was observed at any rate. In greenhouse studies, symptoms were not observed at rates lower than 30% of a 1L/AC rate. Symptoms started with chlorosis at the base of the third leaf and developed on subsequent leaves. Close-ups showing chlorosis 10 (A) and 15 (B) days after application. A B Recognizing Herbicide Residue and Drift Injury in Canola 61
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 and 58: 2,4-D Ester 600 symptoms: 10% of a
Page 59: Effects of Foliar-Applied Group 6 H
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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