Hi Alex -
At 11:27 1/10/99 +1000, you wrote:
>It would be helpful to know what Mundalla Yellows looks like, so birders
>can watch out for it, and hopefully not inadvertently add to its spread.
>Could Birds Australia put a photo on its web-site and advise birding-aus
>accordingly?
I am informed that the main visual symptom of Mundulla Yellows is a
yellowing of the foliage, maybe only on one branch at first, so it
contrasts with the healthier green of the rest of the tree, and something
that, once you are familiar with it, can be recognised on roadside trees
when driving along. On individual leaves there is yellowing of the main
area of the leaf while the veins remain green. It was first recognised in
1980 at the town of Mundulla in South Australia, but has spread
considerably since then, with the main pattern of spread seemingly along
roads. It is possibly caused by a phytoplasma (sort of a plant virus?),
but this has not been confirmed. I agree it would be good to have a photo
or photos on the BA web site, with more information; I hope this will
happen within a few weeks.
Cheers,
Hugo
Hugo Phillipps
Communications Coordinator
Birds Australia
415 Riversdale Road
HAWTHORN EAST 3123, Australia
tel: (03) 9882 2622, fax: (03) 9882 2677
email: <>
Web site: <http://www.birdsaustralia.com.au>
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