Alert
by Brian E. Whipker1
([email protected])
Volume 3, Number 44 July 2014
Zinnia:
Tip Burn of Young Leaves
Leaf tip necrosis is a common problem encountered during summer production of zinnias. This
problem is due to an environmentally induced cal-
2014 Sponsor
Zinnia elegans
© Brian Whipker
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Figure 1. Necrotic leaf edge burn caused by an environmentally induced
e-GRO Alert - 2014
e-GRO Alert
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CONTRIBUTORS
Botrytis
Dr. Nora Catlin
Floriculture Specialist
Cornell Cooperative Extension Suffolk County
[email protected]
Dr. Kristin Getter
Floriculture Outreach Specialist
Michigan State University
[email protected]
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Dan Gilrein
Entomology Specialist
Cornell Cooperative Extension Suffolk County
[email protected]
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Dr. Brian Krug
Floriculture Ext. Specialist
Univ. New Hampshire
[email protected]
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Dr. Joyce Latimer
Floriculture Extension & Research
Virginia Tech
[email protected]
Dr. Roberto Lopez
Floriculture Extension Specialist &
Research
Purdue University
[email protected]
Dr. Paul Thomas
Floriculture Extension & Research
University of Georgia
[email protected]
Dr. Brian Whipker
Floriculture Extension & Research
NC State University
[email protected]
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Tissue Testing
Submitting a normal tissue sample for laboratory analysis
recommendation is to submit the most recently mature
Copyright © 2014
are listed, no discrimination is intended and no endorsement,
guarantee or warranty is implied by the authors, universities
or associations.
With the symptoms occurring on younger leaves, you
instead. In addition, to magnify the extent of the probtissue exhibiting necrosis for submission. Calcium levels
found.
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e-GRO Alert - 2014
© Brian Whipker
Cooperating Universities
NC STATE UNIVERSITY
Floriculture
Figure 2. Close up of marginal leaf necrosis on most of the upper leaves.
© Brian Whipker
In cooperation with our
local and state greenhouse
organizations
Figure 3. A secondary Botrytis infection has occurred on necrotic leaves
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© Brian Whipker
e-GRO Alert - 2014
Figure 4. Tip necrosis occuring only on the youngest leaves.
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e-GRO Alert - 2014
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Management
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Summary
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