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Young growth twists rapidly after herbicide application

Diagnosing group I herbicide damage in field peas

23 April 2015

Group I herbicides are used for broadleaf summer weed control or selective broadleaf weed control in cereals. Damage can be caused by soil residues, spray contact or vapour drift.

White chlorosis on tendrils and spray contact points

Diagnosing group F herbicide damage in field peas

23 April 2015

Group F herbicides are registered for selective control of wild radish, wild mustard and wild turnip in cereals, legume crops and legume pastures.

Reduced and delayed emergence

Diagnosing group D herbicide damage in field peas

23 April 2015

These are pre-emergent herbicides for the control of grasses and some broadleaf weeds in crops. Group D herbicide damage in field peas is rare.

Metribuzin damage. Typically scorched ends/edges of older leaves and tendrils

Diagnosing group C herbicide damage in field peas

23 April 2015

This category contains root pre-emergent Group C herbicides such as simazine and metribuzin that are routinely used in lupins, but damage field peas.

Affected plants are stunted with reduced root systems

Diagnosing group B herbicide damage in field peas

23 April 2015

Sulfonlyureas, imidazolamines and sulfonamides are systemic herbicides that are used for pre and/or post emergent grass and/or broadleaf weed control in cereals and are mostly highly toxic to peas.

The first sign is yellowing/ reddening and sometimes interveinal chlorosis of new growth

Diagnosing glyphosate damage in field peas

23 April 2015

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.

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