Herbicide injury – some varieties are sensitive to herbicides. Princep is likely to cause marginal burning, as is Sinbar.
Princep may also cause leaf yellowing and/or bleaching though usually accompanied by leaf burning/browning.
If root uptake occurs, veinal or interveinal yellowing/necrosis also may occur.In the photo of two raspberry plants side-by-side, both varieties were treated with the same rate of Princep herbicide. ‘Royalty’ purple raspberry is particularly sensitive.
