Puccinia chaerophylli on Sweet Cicely

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Lancashire Lad
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Puccinia chaerophylli on Sweet Cicely

Post by Lancashire Lad » Tue May 19, 2015 2:25 pm

Found locally on Saturday 16th May.

Aecidial stage (Stage 1) of Puccinia chaerophylli, growing on live leaves, petioles, and stems, of Sweet Cicely - Myrrhis odorata.

(Click on images below to view at full size).
Puccinia chaerophylli on Sweet Cicily (Myrrhis odorata).jpg
Puccinia chaerophylli Spores x400.jpg
Spores at x400 magnification.
Puccinia chaerophylli Spores x400 Measured.jpg
Spores at x400 magnification (With annotated measurements).

Regards,
Mike.
Common sense is not so common.

rustbucket
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Re: Puccinia chaerophylli on Myrrhis odorata

Post by rustbucket » Fri May 29, 2015 11:23 am

Hi Mike - rust on Myrrhis more common than on Cow Parsley with us. In fact, rust on Cow parsley only began to show last year for the first time in 18 years of looking for it. The solitary roadside plant of Myrrhis was always severely infected and although it was growing in the middle of hundreds of Anthriscus none of the latter were ever infected.

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Re: Puccinia chaerophylli on Myrrhis odorata

Post by Lancashire Lad » Fri May 29, 2015 12:06 pm

Hi,

Interesting observation - and now that you've mentioned it I think similar must apply around these parts too.

I've yet to find it on Cow Parsley hereabouts, but it was seen on hundreds of Myhhris plants last weekend.

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Mike.
Common sense is not so common.

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Re: Puccinia chaerophylli on Myrrhis odorata

Post by Chris Yeates » Fri May 29, 2015 2:36 pm

Here are maps showing the rust in Yorkshire on Myrrhis:
chaerop-myrrhis.jpg
and on Anthriscus sylvestris:
chaerop-anthriscus.jpg
not quite mutually exclusive, but there is a bit of a trend towards the SE of the county (where Myrrhis is scarce) for the latter. Blue dots are post-1985, the date of Bramley's A Fungus Flora of Yorkshire. In my experience whereas the aecial stage on Myrrhis seems often to shout out at you, it is less noticeable on Anthriscus.

Chris
"You must know it's right, the spore is on the wind tonight"
Steely Dan - "Rose Darling"

rustbucket
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Re: Puccinia chaerophylli on Myrrhis odorata

Post by rustbucket » Fri May 29, 2015 3:10 pm

Thanks Chris - very interesting. I've only got a handful of records in total for this rust on all hosts in Carmarthenshire.
I have a spare hard copy of the Red Data List of Rusts for Wales if you want one. I'll get Adam to sort out how I can send you an email for me to get your postal address if needs be.

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Re: Puccinia chaerophylli on Myrrhis odorata

Post by Chris Yeates » Fri May 29, 2015 4:28 pm

I responded to your PM with my email address in it.

Chris
"You must know it's right, the spore is on the wind tonight"
Steely Dan - "Rose Darling"

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Re: Puccinia chaerophylli on Sweet Cicely

Post by Lancashire Lad » Mon Jul 20, 2015 5:01 pm

I revisited the site on Saturday to find that the uredinal and telial stages of Puccinia chaerophylli had now appeared on the Myrrhis odorata.

Click on images to view at full size.
Puccinia chaerophylli - Uredosori and Teleutosori on Myrrhis odorata leaves.jpg
Puccinia chaerophylli - Uredosori & Teleutosori on Myrrhis odorata leaves.
Puccinia chaerophylli - Teliospores and Uredospores x400.jpg
Puccinia chaerophylli Teliospores & Uredospores x400.
Puccinia chaerophylli - Teliospores and Uredospores x400 measured.jpg
Puccinia chaerophylli Teliospores & Uredospores x400 (with measurement annotation).
Regards,
Mike.
Common sense is not so common.

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