Showing posts with label Pests and Diseases. Show all posts
Showing posts with label Pests and Diseases. Show all posts

Saturday, June 23, 2012

Callistemon salignus 'Great Balls of Fire'

Red new growth on Callistemon 'Great Balls of Fire' with silver Westringea 'Smokie'
The parent plant Callistemon salignus is a fairly ordinary native tree which is very much prone to sooty mould after being infested with scale insects as well as producing insignificant flowers. 
This low growing cultivar which has been on the garden scene for a few years now is proving to be terrific plant for use as a low hedge or good solid rounded shrub to 1.5 metres. It produces continual flushes of new pinky red leaves throughout the year and benefits from a bit of shearing to keep it looking good. It grows well across a range of climates and is versatile enough to do the cross-over thing of mixing well with native plants and exotics. I have not come across any advanced nursery specimens so you may have to start with a small pot plant. Given a good start with some fertilizer or soil improvement it is quick to establish however and growth is fairly rapid if given supplementary irrigation.

Thursday, January 12, 2012

Myrtle Rust

Myrtle Rust on Lilly-Pilly , Syzygium australe

A friend rang me this week to tell me that the leaves on his Lilly Pilly were turning orange. When I went to visit, it turned out to be the dreaded myrtle rust so we removed the shrub and put it into plastic bags to kill the pest spores. We probably didn't need to take such drastic action, as a call to the Department of Primary Industries "pest hotline" gave very helpful advice on what fungicides to use to control its spread. (Their phone number in New South Wales is 1800 084 881) It is important to take a vigilant stance against the spread of myrtle rust . It affects all members of the Myrtaceae family including Gum trees (Eucalyptus), Bottlebrush (Callistemon and Melaleuca) ,Tea Tree (Leptospermum) ,Lilly Pilly (Syzygium, Acmena and Waterhousia ), Willow Myrtle (Agonis),Lemon Myrtle (Backhousia), Midyim Berry (Austromyrtus), Brush box (Lophostemon) New Zealand Christmas Bush (Metrosideros) and the fruiting exotic Gauva and Feijoa