Dr. Phyto

southern magnolia

Magnolia grandiflora

Diseases & pests on this plant

• bacterial blight / canker (multi-host)Pseudomonas syringae pv. syringae

  Brown-black angular leaf spots with yellow halos, blackened buds + young shoots that fail to open, sunken brown cankers on stems with bacterial ooze in spring, blossom blight in cool wet bloom periods, branch dieback in heavy infections.

• brown soft scaleCoccus hesperidum

  Flat oval brown-tan scales (3-5mm) on undersides of leaves + along stems, sticky honeydew dripping onto floor or lower leaves, black sooty mould growing on the honeydew, leaf yellowing + drop in heavy infestations, ants attracted to honeydew.

• longtailed mealybugPseudococcus longispinus

  White cottony masses with long fluffy tails on twigs and fruit, copious honeydew, sooty mould blackening leaves, distorted fruit when calyx end infested.