Ring pox

List of apricot diseases
This article is a list of diseases of apricots (Prunus armeniaca)

http://www.agf.gov.bc.ca/cropprot/tfipm/images/mottleleaf.jpg
ring pox disease of apricot ( Apricotring pox and cherry twisted leaf diseases )
Host plants / species affected
Prunus armeniaca (apricot)
Prunus avium (sweet cherry)
Prunus salicina (Japanese plum)
Prunus virginiana (common chokecherrytree)
List of symptoms/signs
Fruit - lesions: black or brown
Fruit - lesions: scab or pitting
Fruit - abnormal shape
Fruit - premature drop
Leaves - necrotic areas
Leaves - abnormal patterns
Leaves - abnormal forms
Symptoms
Apricot ring pox
The most typical symptom of ring pox appears on fruits just before
ripening. Affected fruits show discoloured and necrotic areas on the
surface and develop black pox or concentric rings that expand
andcoalesce and can extend under the skin and deep inside the flesh.
Symptomatic fruits can be irregularly distributed on the plant; they
can be concentrated on a few branches, whereas the rest of the plant
appears almost healthy.
Leaf symptoms develop on late-emerging leaves and consist
ofveinbanding, chlorotic spots and rings that become more pronounced
during the growing season. In some cases, spots and rings become
necrotic and drop off to produce holes in the leaves. In some
cultivars, reddish spots are also observed on current-season twigs
that can necrotize. Responses to inoculation with Apricot ring pox
virus depends on the cultivar and the virus strain. Several cultivars
can be symptomless (see Host range), but on the basis of different
symptoms caused in cvs. Tilton, Riland, Perfection and Wenatchee,
various strains have been distinguished (Hansen et al., 1976).
A common strain of apricot ring poxvirus generally induces leaf
symptoms in cv. Tilton, but the black scarf and the rings in the
fruits remain superficial and never extend deeply into the flesh.
However, leaf symptoms are often not produced on Tilton by the pit pox
strain, whereas the fruit discoloration and necrosis penetrate the
flesh, reaching the seed in most cases.
Cherry twisted leaf
A twist in the midrib or petiole of the leaves is the most typical
symptom of the disease in cherry. Affected plants develop
asymmetricleaves that may show downward curling and may prematurely
abscise. Affected shoots may be severely stunted because of a
shortening of the internodes. Fruit distortion may also be observed.
Prevention and Control
Preventive measures must be adopted to impede the introduction and
establishment of the diseases in new areas or in new orchards. The use
of virus-free propagation material and the fast elimination of
symptomatic trees prevent the widedissemination of the diseases in
affected areas.
Removing infected chokecherry (Prunus virginiana) bushes from within
500 m of orchards has been found to prevent new infections (Hansen and
Mink, 1995).
Impact
Apricot ring pox and cherry twisted leaf only cause sporadic problems
in restricted (Such as Executive) areas.

--
President of The United States
Guy Ralph Perea Sr President of The United States
Weatherdata1046am0426 a Discussion Group of
Weatherdata<http://groups.google.com/group/weatherdata1046am0426>
USFMSC
http://www.cityfreq.com/ca/avalon/
QUALIFY
http://ptusss.blogspot.com/2012/08/proof-of-weather-spotter-qualify.html
OCCUPS
http://www.occupationalinfo.org/02/025062010.html
goldlandabstracts; link check
own search engine - The United
States International Policies
http://apps.facebook.com/faceblogged/?uid=1340855784
http://lnk.ms/8d5gl aol
http://groups.google.com/group/united-states-of-american
http://ptusss.blogspot.com/
http://twitter.com/guyperea
http://twitter.com/ptusss Federal Communication
Commission<http://columbiabroadcast.spaces.live.com/>

Ambassador Chevy Chase; Kevin Corcran; Jack Nickolas; Cher; Shirley Temple
Black; Liza Minnille; Ansari; Ernest Tascoe; Food, Drug and Cosmetic Act
Agent Jodie Foster; Department of Veterans Affairs Director George H.W. Bush
Title 22 USCS section 1928 (b) The e-mail
transmission may contain legally privileged information that
is intended only for the individual or entity recipient, you are hereby,
notified that any disclosure, copying, distribution, or reliance upon the
contents of this E-mail is strictly prohibited. If you have received this
E-mail transmission in error, please reply to the sender, so arrangements
can be made for proper delivery. Title 42
USCS section 192 etseq Margie Paxton Chief of Childrens Bureau of as
Director of The United States Department of Human Services; Defendant
Article IV General Provisions Section 2
(Supreme Law of The Land) The Constitution of The United States "Any thing
in The Constitution or Laws of any State to the Contrary Notwithstanding"
Contrary to Law (of an act or omission) illegal;
https://plus.google.com/100487463984952448443
https://twitter.com/presidentus1
http://ptusss.blogspot.com/2012/03/march-19-2012-rules-federal-swordfish_18.html