We welcome contributions from anyone with an interest in wildlife. Our aim is that the blog will be used for sharing sightings, photographs, events, and any other aspects of natural history interest in the East Glamorgan area of Vice County 41. This covers Bridgend, Rhondda Cynon Taff, Merthyr Tydfil, Vale of Glamorgan, Cardiff and the western part of Caerphilly.
Southern Marsh Orchids
Thursday 9 July 2015
Creeping thistle disease.
Following on from Marks post, I noticed many
Thistles infected on Mynydd bach, Maesteg today.
This is one of three images I took and I estimated
that around one in eight plants were affected.
Interesting. I haven't seen any apart from at the Pwll Waun Cynon site, but we really aught to make a note of these occurrences, just in case the data will be of some use in the future. I just wish there was somewhere to report them to.
I doubt it very much Adam. These are growing on disused slag heaps and would have to be sprayed by hand due to the terrain. I never see any farmers up there either.
The symptoms look spot on for White Thistle disease and I know that Martin Bell has seen it in a few sites, locally. No doubt, it will, given time, be present in just about every population of Creeping Thistle.
Interesting. I haven't seen any apart from at the Pwll Waun Cynon site, but we really aught to make a note of these occurrences, just in case the data will be of some use in the future. I just wish there was somewhere to report them to.
ReplyDeleteIs there any possibility they have been sprayed with herbicide Paul? I know that some hebiciodes can cause that kind of bleaching.
ReplyDeleteI doubt it very much Adam. These are growing on disused slag heaps and would have to be sprayed by hand due to the terrain. I never see any farmers up there either.
ReplyDeleteThe symptoms look spot on for White Thistle disease and I know that Martin Bell has seen it in a few sites, locally. No doubt, it will, given time, be present in just about every population of Creeping Thistle.
ReplyDelete