Hi
Our pear tree leaves are all being very damaged by something . The underside of the leaves have got several hard lumps yellows brown in colour - these seem to be releasing a chemical which then damages the leaf and the upper surface is covered in brown area.
Does anyone know what this is and how we treat it?
Our pear tree leaves are all being very damaged by something . The underside of the leaves have got several hard lumps yellows brown in colour - these seem to be releasing a chemical which then damages the leaf and the upper surface is covered in brown area.
Does anyone know what this is and how we treat it?