Herbicide Residue Drift Injury - Canola Council of Canada

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20 Group 2 Residue Symptoms on True Leaves Group 2 Residue Symptoms on True Leaves Severe Symptoms Severe symptoms are characterized by meristematic damage which may result in; 1) poor recovery and subsequent maturity delay, 2) yield loss, or 3) plant death Other symptoms may include early and long lasting purpling or chlorosis, cupping, reduction in leaf area and very slow growth. Severe injury is not mimicked by nutrient, insect or disease injury symptoms. Severe chlorosis, purpling and cupping (1) and a normal plant (2). 1 2
Severe Symptoms At the 3-leaf stage (A), unaffected (left) and severely affected (right) plants. Affected plants have chlorotic cotyledons with minimal first leaf growth. A After four weeks of growth (B), there was minimal leaf recovery. B Recognizing Herbicide Residue and Drift Injury in Canola 21
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: An unaffected plant (left) and one
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 and 60: Effects of Foliar-Applied Group 6 H
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

Herbicide Residue Drift Injury - Canola Council of Canada

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