Ursolic Acid: A Wonder Chemical in Blueberries
Ursolic acid has been used in folk and Chinese medicine for a long time. From the Middle Ages, fruits and vegetables containing ursolic acid were used as a treatment for a variety of conditions, both topically and internally. Ursolic acid …
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Blueberry Canning, Freezing, Storing
Blueberry Mechanical Harvesting Project
Glossary Terms
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Stem Blight of Blueberry — Control
Cross-section of blueberry stem
showing brown discoloration
caused by the fungus
Botryosphaeria dothidea.
Image courtesy of NCSU CES.
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
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.
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 …
Anther
The part of the stamen that contains pollen.
Parts of a flower.
A perfect flower has functional male parts (stamens) and female parts (pistils).
Pistil: The female part of a flower, consisting of a stigma, a style and an
Leaf Rust of Blueberry
Rabbiteye cultivars suffer from pre-
mature defoliation that appears
to be caused by a rust fungus,
tentatively identified as
Pucciniastrum vaccinii (Synonym P.
myrtillus). Photo courtesy of
NCSU Cooperative Extension Service.
mature defoliation that appears
to be caused by a rust fungus,
tentatively identified as
Pucciniastrum vaccinii (Synonym P.
myrtillus). Photo courtesy of
NCSU Cooperative Extension Service.
Leaf rust, caused by the rust fungus, Pucciniastrum vaccinii …
Alternaria Leaf Spot of Blueberry
Alternaria Leaf Spot (Alternaria tenuissima) occurs primarily in the spring during prolonged periods of cool wet weather, when spores are produced in abundance. In most cases only lower leaves are affected; however, instances do occur when severe infection completely defoliates …
Gloeosporium Leaf Spot or Anthracnose of Blueberry
Gloeosporium Leaf Spot or Anthracnose
can produce flecking, leaf anthracnose
and stem lesions. Photo courtesy of
NCSU Cooperative Extension Service
can produce flecking, leaf anthracnose
and stem lesions. Photo courtesy of
NCSU Cooperative Extension Service
Gloeosporium leaf spot can cause severe defoliation and reduction in yield of blueberry crops.
Symptoms include:
- Small reddish flecks on
Double Spot and Gloeocercospora Leaf Spot
Dothichiza caroliniana and Gloeocercospora inconspicua
In late summer, the double spot fungus develops a secondary necrotic area around the original lesion spreading in an irregular to fan-shaped pattern. The gloeocercospora leaf spot appears on the foliage by mid-summer as large …