Diagnosing glyphosate damage in narrow-leafed lupins
Glyphosate is a systemic knockdown herbicide that is used extensively for brown fallow, summer weed or pre-seeding weed control, or selective weed control in glyphosate resistant crops.
What to look for
- Limp discoloured plants that may slowly die.
- Direct spray damage is uniformly distributed but varies with spray coverage on overlaps or boom turns.
- Spray drift damage is worse near the source.
- The first sign is pale new growth.
- Plants then wilt and die.
- Dying seedlings develop a mushy hypocotyl.
What else could it be
|Diagnosing group B herbicide damage in narrow-leafed lupins||Yellowing of new leaves||Plants do not wilt and they take much longer to die back.|
|Diagnosing sulphur deficiency in narrow-leafed lupins||Pale small new leaves||Plants do not wilt and die.|
|Diagnosing iron deficiency in narrow-leafed lupins||Pale small new leaves.||Plants do not wilt and die.|
|Diagnosing zinc deficiency in narrow-leafed lupins||Stunted plants with pale new leaves.||Plants do not wilt and die.|
- No treatment - plants then wilt and die.
Page last updated: Thursday, 5 February 2015 - 9:53am