Hi Steve!


I think the Hawthorn and the Apple are of the same genus or family

Same family (Rosaceae), yes, different genuses.. ummmmm, genera.

and were affected by the same Blight.

Possible... the cedar-apple rust (Gymnosporangium juniperi-virginianae) will
also infect hawthorn. I don't know if hawthorn rust (G. globosuma) also infects
apple. See http://ianrpubs.unl.edu/plantdisease/g1327.htm for probably more info
than you ever wanted on rusts, in case you don't have Nina's article (she's out
of town for a few days, or she'd be right in here!).

The disease was traveling back and forth from the Juniper and the Haw-thorns.
My juniper survived.

Glad to hear that! Tho both the rusts are usually less damaging to the juniper
than to the rosaceous hosts. Among my trees the orchard apples are often
defoliated by the rust, and I have yet to see any galls on my (bonsai) junipers,
tho the local redcedars are always loaded. In spite of my picking off every gall
within reach :/

but I had to get rid of the Haw thorns they were reeking havoc on my juniper

You should be safe now, as long as there aren't haws in your local hedgerow or
neighbor's yard... if we hear of a mysterious nightime Hawthorn Killer loose in
Long island, we know nothing

Anita
Northern Harford County, Maryland, USDA zone 6
Go forth under the open sky, and list
To Nature's teachings.
- William Cullen Bryant

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Hi Steve!


I think the Hawthorn and the Apple are of the same genus or family

Same family (Rosaceae), yes, different genuses.. ummmmm, genera.

and were affected by the same Blight.

Possible... the cedar-apple rust (Gymnosporangium juniperi-virginianae) will
also infect hawthorn. I don't know if hawthorn rust (G. globosuma) also infects
apple. See http://ianrpubs.unl.edu/plantdisease/g1327.htm for probably more info
than you ever wanted on rusts, in case you don't have Nina's article (she's out
of town for a few days, or she'd be right in here!).

The disease was traveling back and forth from the Juniper and the Haw-thorns.
My juniper survived.

Glad to hear that! Tho both the rusts are usually less damaging to the juniper
than to the rosaceous hosts. Among my trees the orchard apples are often
defoliated by the rust, and I have yet to see any galls on my (bonsai) junipers,
tho the local redcedars are always loaded. In spite of my picking off every gall
within reach :/

but I had to get rid of the Haw thorns they were reeking havoc on my juniper

You should be safe now, as long as there aren't haws in your local hedgerow or
neighbor's yard... if we hear of a mysterious nightime Hawthorn Killer loose in
Long island, we know nothing

Anita
Northern Harford County, Maryland, USDA zone 6
Go forth under the open sky, and list
To Nature's teachings.
- William Cullen Bryant

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

I don't know/ Those Hawthorns are sneaky.
SteveW
Long Island NY

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I di have galls n my Junipers. Fortunately the galls appeared on small branches that I could afford to lse and cut them off. I got them before they opened so I didn't have any other damage to the Junipers
SteveW
Long Island NY

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Anita said:
Lucky? Well, so far! The cedar-apple rust is a different species from the
cedar-hawthorn rust, I believe. Our own Nina Shishkoff authored an
excellent
short article on the rusts in the ABS's journal not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work was done by Andy Walsh.
It's a good paper to consult for the host range of the 3 major juniper
gall rusts.

Nina

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

Anita said:
Lucky? Well, so far! The cedar-apple rust is a different species from the
cedar-hawthorn rust, I believe. Our own Nina Shishkoff authored an
excellent
short article on the rusts in the ABS's journal not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work was done by Andy Walsh.
It's a good paper to consult for the host range of the 3 major juniper
gall rusts.

Nina

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

Anita said:
Lucky? Well, so far! The cedar-apple rust is a different species from the
cedar-hawthorn rust, I believe. Our own Nina Shishkoff authored an
excellent
short article on the rusts in the ABS's journal not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work was done by Andy Walsh.
It's a good paper to consult for the host range of the 3 major juniper
gall rusts.

Nina

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

Anita said:
Lucky? Well, so far! The cedar-apple rust is a different species from the
cedar-hawthorn rust, I believe. Our own Nina Shishkoff authored an
excellent
short article on the rusts in the ABS's journal not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work was done by Andy Walsh.
It's a good paper to consult for the host range of the 3 major juniper
gall rusts.

Nina

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

--- Nina Shishkoff wrote:
Anita said:
Lucky? Well, so far! The cedar-apple rust is a
different species from the
cedar-hawthorn rust, I believe. Our own Nina
Shishkoff authored an
excellent
short article on the rusts in the ABS's journal
not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work
was done by Andy Walsh.
It's a good paper to consult for the host range of
the 3 major juniper
gall rusts.

Nina

Nina,

Merely co-authoring a paper makes you an expert in my
book, I for one haven't even read the paper.

Kitsune Miko

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

--- Nina Shishkoff wrote:
Anita said:
Lucky? Well, so far! The cedar-apple rust is a
different species from the
cedar-hawthorn rust, I believe. Our own Nina
Shishkoff authored an
excellent
short article on the rusts in the ABS's journal
not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work
was done by Andy Walsh.
It's a good paper to consult for the host range of
the 3 major juniper
gall rusts.

Nina

Nina,

Merely co-authoring a paper makes you an expert in my
book, I for one haven't even read the paper.

Kitsune Miko

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
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+++++ Questions? Help? e-mail +++++

I am now wondering if there's any link between these and a type of
woolly aphids that appear annually on the same apple trees.

The gall aphids on apple are the same aphids that feed on elm foliage,
oddly enough. So if you have elms in your yard, you will have to watch
your apples for root galls!

Nina.

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

--- Nina Shishkoff wrote:
Anita said:
Lucky? Well, so far! The cedar-apple rust is a
different species from the
cedar-hawthorn rust, I believe. Our own Nina
Shishkoff authored an
excellent
short article on the rusts in the ABS's journal
not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work
was done by Andy Walsh.
It's a good paper to consult for the host range of
the 3 major juniper
gall rusts.

Nina

Nina,

Merely co-authoring a paper makes you an expert in my
book, I for one haven't even read the paper.

Kitsune Miko

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

I am now wondering if there's any link between these and a type of
woolly aphids that appear annually on the same apple trees.

The gall aphids on apple are the same aphids that feed on elm foliage,
oddly enough. So if you have elms in your yard, you will have to watch
your apples for root galls!

Nina.

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

I am now wondering if there's any link between these and a type of
woolly aphids that appear annually on the same apple trees.

The gall aphids on apple are the same aphids that feed on elm foliage,
oddly enough. So if you have elms in your yard, you will have to watch
your apples for root galls!

Nina.

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++

Anita said:
Lucky? Well, so far! The cedar-apple rust is a different species from the
cedar-hawthorn rust, I believe. Our own Nina Shishkoff authored an
excellent
short article on the rusts in the ABS's journal not long ago (would be
worthwhile to have that on the Web somewhere!).

I merely co-authored that paper; most of the work was done by Andy Walsh.
It's a good paper to consult for the host range of the 3 major juniper
gall rusts.

Nina

************************************************** ******************************
++++Sponsored, in part, by Ken Rutledge++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++