Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001532
11/12/99
VINCA DISEASE PROBLEMS
Blight causes brown or black spots which extend inward
from the leaf edge and eventually cover the whole leaf.
Space plants farther apart in subsequent plantings.
Remove infected plants.
Canker and dieback cause the shoot tip to become dark
brown, wilt, and die back to the soil surface. The
disease is most common during rainy weather. Infected
plants should be discarded.
Several fungi cause leaf spots on periwinkle.
Root rots cause decay of roots and stems. In wet weather
a cobwebby growth forms on the lower stems. The lower
leaves rot and the upper part of the plant dies.
Related information.
Pesticide Recommendations
Vinca Canker
This information is for educational purposes only. References
to commercial products or trade names does not imply
endorsement by MSU Extension or bias against those not
mentioned. This information becomes public property upon
publication and may be printed verbatim with credit to MSU
Extension. Reprinting cannot be used to endorse or advertise
a commercial product or company.
This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
For more information about this data base or its contents please contact
heatley@msue.msu.edu . Please read our
disclaimer for important
information about using our site.