Wednesday, April 6, 2016

Peppermint twist?

There seems to be an unusually large number of semi-mature WA Peppermints* dying around Perth.


Click photo to enlarge
They're a species that can be a bit unpredictable I know, but this seems to be more than that.

What do you reckon? Normal attrition? Or is there something more sinister going on?

It might be in the Shire of Peppermint Grove's interest to find out given it's the ONLY species they use in their streets (!)

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*Agonis flexuosa

2 comments:

  1. This phenomenon is not limited to the Shire of Peppy Grove. In the Town of Bassendean there has been a very poor success rate of Agonis plantings in the last decade. Some make it almost 8 years then, suddenly all brown. Some don't make it through the first summer. One could point a finger at the species in the case of Bassendean (more likely quality of stock) but in the Grove, nothing "normal " there. So where do they get these trees from?

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    1. I don't know that Peppermint Grove is having a particular problem with it - I just figured it's something they would like to be aware of given their complete dependence on the species. As you say, quality of stock could be a factor - eg poor root systems which can't cope once the canopy gets to a certain size (?) That would be better news than say some new pathogen that's knocking them off. A really concerning example is Railway Rd, Shenton Park (between Nicholson and Onslow) - there's a lot of "mature" ones (calipers around 300mm) that have all died. Given the importance of this species to local government they might want to collectively fund a study to find out what's going on.

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