|I have a magnolia tree and it has scab disease. I have sprayed it at least three times this year. Each times it seems I have less scab coming back. Also, this year it seems like it has attracted a lot of bees. What is your recommendation? Thank you|
|I'm not familiar with scab disease on Magnolias so I wonder if the problem with your tree was properly diagnosed. Magnolia may be subject to leaf spots caused by the bacterium Pseudomonas syringae or a large number of fungi. Leaf spots rarely require chemical controls. Rake up and dispose of infected leaves. |
Canker diseases will kill branches. Cankers on branches can be pruned out. Keep trees healthy with regular fertilization and by watering in dry weather.
Verticillium wilt may cause death of a few branches or may kill the tree. Prune out dead branches and keep the tree healthy.
For a positive diagnosis of the problem, take a leaf sample to your local Cooperative Extension office. Helpful folks there can identify the problem and make control recommendations.