• Leaf-Rollers on Cannas and Vinca Major

    What do you do about leaf-rollers on Cannas, Vinca Minor and Vinca Major? 

    Systemic insecticides are a special group of insecticides that are taken up into the plant through its leaves or through its roots. Unlike most insecticides that remain on the foliage, systemic insecticides make the plant sap poisonous to feeding insects.