Stem Blight of Blueberry — Control

 

Botryosphaeria dothidea
Cross-section of blueberry stem
showing brown discoloration
caused by the fungus
Botryosphaeria dothidea.
Image courtesy of NCSU CES.

 

The control of stem blight depends on cultural practices; fungicides do not provide adequate protection.

Having a clean planting stock is the …

Stem Blight of Blueberry

 

Stem blight of blueberries
Early symptoms of stem blight on blueberries are yellowing, reddening
or drying of leaves on one or more
branches. Photo courtesy of NCSU
Cooperative Extension Service.

Blueberry stem blight caused by the fungus Botryosphaeria dothidea and other Botryosphaeria species is …

Powdery Mildew of Blueberry

 

Powdery Mildew
Yellow to black fruiting
bodies (cleistothecia) form on infected
leaves. Photo courtesy of
NCSU Cooperative Extension Service

The powdery mildew disease usually does not develop on blueberry leaves until midsummer after the crop is harvested.

Symptoms:

  • A white fungus growth

Septoria Leaf Spot of Blueberry and Grape

 

Septoria Leaf Spot
The septoria leaf spot fungus overwinters
in infected leaves on the ground
and in stem lesions.
Photo courtesy of NCSU Cooperative
Extension Service.

 

Symptoms:

  • Small to medium brown leaf spots with purplish margins.
  • Lesions on succulent green stems.
  • Premature defoliation

Blueberry Diseases: An Overview

Diseases caused by plant pathogenic fungi, viruses and bacteria can cause significant economic loss in commercial blueberry fields.

Blueberry diseases can be grouped into broad categories based on the type of plant pathogenic organism that causes the diseases – fungi, …