Verticillium wilt Magnolia

Disease Information

Verticillium wilt

Symptomsand damage

Verticillium wilt appears as yellowing on the leaf margins and between veins of magnolia leaves. The infected leaves wilt, die and prematurely fall from the magnolia. This fungal disease begins at the tops of leaves and works its way back toward the tree branches. Verticillium wilt is not present in cool temperatures; the first signs of the fungal disease won`t be visible until the weather warms. There is no acceptable fungicide control to treat verticillium wilt. However, cultural control will help prevent this damaging fungal disease from attacking the magnolia. Planting magnolia trees in disease-free soil greatly reduces the chance of verticillium wilt. You can sterilize the soil before planting with solarization to kill pathogens living in the top several inches of the soil.

 

Management

Avoid stressful conditions for the plants, including over­watering, drought and root-wounding that will facilitate Verticilliumspp. infection. Avoid planting in areas with previous outbreaks of Verticilliumwilt. Fungicides are not effective in management of Verticilliumwilt.

 



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