[MAIPC] biological control of wineberry

[Marc Imlay]

So does anyone plan to go to Frederick MD to see if the new biocontrol of
wineberry is still there?

 

Marc

 

 


Bruckart, W.L., Eskandari, F. 2015. First Report of a Leaf Spot caused by
Sphaerulina tirolensis on Rubus phoenicolasius. Plant Disease. Volume 99,
Number 9, Page 1275.

Technical Abstract: Diseased leaves of Rubus phoenicolasius (wineberry) were
discovered on October 11, 2013 in a small, 3x3 m, infestation at a sunny
location along Indian Springs Rd., Frederick, MD (N 39.467634, W 77.461362).
Although the proportion of diseased plants was estimated to be less than10
per cent of the population, several leaves had numerous, angular, discrete
necrotic spots, as large as 1 mm diam., characterized by white or light
gray, necrotic centers containing pycnidia and distinct, thin, dark red
margins. Isolation from surface-sterilized leaf tissue on acidified potato
dextrose agar resulted in recovery of a Septoria-like fungus (FDWSRU
13-028). Koch's postulates were satisfied after two separate inoculations of
five healthy cut canes each of R. phoenicolasius from greenhouse-propagated
plants; the same fungus was reisolated after each inoculation. The isolate
was characterized by narrow, tubular, long, hyaline, and straight, curved or
flexuous conidia having 4-6(-8) septations and measuring (mean [c.i.], P =
0.05; w x l) 2.25 [0.12] x 54.5 [ 4.6] microns. DNA was extracted from the
isolate using DNEasy and sequenced for ITS1, 5.8S, and ITS2 (GenBank No.
KM408152). Using the BLAST option in GenBank, two accessions from raspberry,
Rubus idaeus (GenBank Nos. KF251638 and KF251637), listed as "living
cultures ex-type CBS 109017, 109018" by Verkley et al (2013), were 99 per
cent similar, having only one nucleotide difference from the FDWSRU 13-028
sequence. The pathogen is tentatively identified as Sphaerulina cf.
tirolensis Verkley, Quaedvlieg & Crous, on the basis of similar conidium
morphological (Ellis et al. 1991, Verkley et al. 2013) and molecular
characteristics (Verkley et al. 2013). Specimens have been submitted to the
USDA, ARS, SMML and to the CBS Fungal Biodiversity Centre in Utrecht, The
Netherlands. Wineberry is a raspberry that was introduced from Asia and is
now an invasive species in the eastern USA. This is the first report of S.
tirolensis, a raspberry pathogen, on R. phoenicolasius. Characterization of
diseases at new locations for plant introductions is fundamental to
understanding ecological events and interactions where the host is
introduced. This disease is likely established in the USA, because
symptomatic plants were found at a new site near the original patch on
August 15, 2014, and observations of significant increase in incidence have
been made in September, 2014. At the present level of disease and the fact
that symptoms appear after fruiting, it seems unlikely that this leaf spot
is affecting population density to any significant level.

 

https://www.ars.usda.gov/research/publications/publication/?seqNo115=310070

Author




 <https://www.ars.usda.gov/people-locations/person?person-id=698> Bruckart,
William - Bill

 

Biological control: Numerous diseases and insects affect wineberry,
including wineberry latent virus. See Ellis and others [
<http://www.fs.fed.us/database/feis/plants/shrub/rubpho/all.html#17> 17] for
a review.

https://www.inaturalist.org/guide_taxa/354717

17. Ellis, Michael A.; Converse, Richard H.; Williams, Roger N.; Williamson,
Brian. 1997. Compendium of raspberry and blackberry diseases and insects.
St. Paul, MN: The American Phytopathological Society. 100 p. [73168]

Raspberry is also a host

 

 



-- 
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20210610/e4c5bd34/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.gif
Type: image/gif
Size: 101 bytes
Desc: not available
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20210610/e4c5bd34/attachment.gif>