Entomosporium leaf spot of photinia
THE UNIVERSITY OF TENNESSEE
AGRICULTURAL EXTENSION SERVICE
Entomosporium Leaf Spot of Photinia
Alan Windham, Professor, Entomology and Plant Pathology
Photinia, a broad leaf evergreen, is widely grown
in nurseries in Tennessee.
It is used extensively
in landscape plantings, most often in border
plantings. Photinia X fraseri is
because of its bright red immature foliage. Leaf
spot caused by the fungus Entomosporium
structive disease of photinia and other species inthe family Rosaceae in nurseries and landscapebeds. This disease is most often reported on red-tipphotinia (P. X fraseri).
S y m p t o m s
Leaf spots on photinia are at first very small,
slightly raised spots on either surface of the leaf.
Older spots have a slightly depressed brown cen-ter with dark red, raised margins. On heavily in-fected leaves, spots may grow together and form
large lesions that lead to premature defoliation.
For successful control of leafspots, a good spray
The disease is usually limited to the leaf blades,
program, along with sanitation and pruning, is nec-
but occasionally may occur on petioles and succu-
essary. Diseased plants should be pruned in the
spring before new growth appears. Also, if possible,fallen leaves should be removed and burned. Cut-
tings should only be taken from disease-free stock
In the spring, symptoms first appear on the
plants. If liners are purchased, they should be care-
new growth of the lowest branches and the disease
fully inspected for disease symptoms. Container-
spreads upward. The fungus over-winters on in-
grown plants should be widely spaced to encourage
fected twigs and fallen infected leaves from the
good air movement and rapid foliage drying.
previous year. Spores from the twigs and fallen
If Entomosporium leaf spot has been a problem
leaves are splashed onto the plants by rainwater
on container plants, fungicide sprays should be ap-
and overhead irrigation. High humidity, cool tem-
plied to the foliage as soon as new growth appears
peratures and crowded conditions favor disease
and continued at seven to 10-day intervals. Fungi-
development. Container-grown plants are more
cides that have been shown to be highly effective
likely to be damaged by the disease than field-
against this disease are Banner, Immunex,
To protect people and the environment, pesticides should be used safely. This is everyone’s responsibility,
especially the user. Read and follow label directions carefully before you buy, mix, apply, store or dispose
of a pesticide. According to laws regulating pesticides, they must be used only as directed by the label.
Pesticides recommended in this publication were registered for the prescribed uses when printed. Pesticide
registrations are continuously being reviewed. Should registration of a recommended pesticide be
cancelled, it would no longer be recommended by the University of Tennessee. Use of trade or brand
names in this publication is for clarity and information; it does not imply approval of the product to the
exclusion of others which may be of similar, suitable composition,
nor does it guarantee or warrant the standard of the product.
A State Partner in the Cooperative Extension System
The Agricultural Extension Service offers its programs to all eligible persons
regardless of race, color, national origin, sex, age or disability and is an Equal Opportunity Employer.
COOPERATIVE EXTENSION WORK IN AGRICULTURE AND HOME ECONOMICS
The University of Tennessee Institute of Agriculture, U.S. Department of Agriculture,
and county governments cooperating in furtherance of Acts of May 8 and June 30, 1914.
Vorblatt Problem: 1. Einführung einer Meldepflicht von Verdachts-, Erkrankungs- und Todesfällen an transmissiblen spongiformen Enzephalopathien: Gemäß § 1 Abs. 3 Epidemiegesetz 1950, BGBl. Nr. 186, in der Fassung BGBl. I Nr. 114/2006, unterliegen Todesfälle an subakuten spongiformen Enzephalopathien der Meldepflicht. Damit ist prinzipiell die Meldepflicht für die Creutzfeldt-Jako
Journal of Psychosomatic Research 53 (2002) 873 – 876Central pathways to morbidity and mortalityJanice K. Kiecolt-Glasera,*, Ronald GlaserbaDepartment of Psychiatry, The Ohio State University College of Medicine, 1670 Upham Drive, Columbus, OH 43210, USAbDepartment of Molecular Virology, Immunology, and Medical Genetics, The Ohio State University College of Medicine, Columbus, OH 43210,