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Megan Haas

mheller@purdue.edu

2 articles by this author

Article List

Septoria Leaf Spot on Dogwood

July 30, 2019 - From Issue: 19-12
By: Megan Haas
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Ornamental dogwoods are prone to several leaf spot diseases, but the fungus, Septoria, is commonly found in Indiana.  It causes angular, brown lesions bordered by a purplish color on the leaf.  The leaf spot symptoms are similar to dogwood anthracnose, however, Septoria does not infect the twigs or branches so it is a much less[Read More…]

 Article Categories:
  • Plant Diseases
  • Trees, Shrubs, Vines

Needlecast in Colorado Blue Spruce

June 11, 2019 - From Issue: 19-09
By: Megan Haas
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Introduction The Colorado Blue spruce is not native to Indiana and tends to be susceptible to disease.  One common disease, caused by the fungus Rizosphaera kalkhoffii, results in the defoliation of the tree.  If left untreated needlecast can lead to the death of the tree. Symptoms and Signs Symptoms of needlecast don’t develop until two[Read More…]

 Article Categories:
  • Plant Diseases
  • Trees, Shrubs, Vines
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This work is supported in part by Extension Implementation Grant 2021-70006-35390 / IND90001518G-1027053 from the USDA National Institute of Food and Agriculture