The hawthorns deveoped a nasty looking growth on the bark. It must have been contagious , becuase it affected all the hawthorns

SteveW
Long Island NY


-----Original Message-----
From: Jim Lewis
To:
Sent: Sat, 18 Jun 2005 15:56:06 -0400
Subject: [IBC] Hawthorn Bonsai


Steve wachs wrote:
it is a seesaw battle between the Crab Apples and the
Junipers. I try to keep them separated. But you know how
trees are they just have to mingle. It ook on a
different appearance with the Hawthorns. The bark swelled
and took on witches broom appearance
SteveW Long Island NY

It is unlikely that that was a rust that swelled the bark or caused the witches' broom.

Hawthorn (Crataegus) are not involved in ceder apple rust. They ARE susceptible to quince rust (Gymnosporangium sp.) but rusts affect leaves, not stems, and don't do witches' brooms.

BTW, the Ortho Home Gardener's Problem Solver lists J. chinensis 'Foemina' and 'Keteleeri' and var. sargentii as "resistant" to cedar apple rust. J. scopularum and varieties are "particularly susceptible" to cedar apple rust.

Jim Lewis - - This economy is a wholly owned subsidiary of the environment. - Gaylord Nelson

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