st johns wort help please

[Cahill]

i put our two colts in our big field while i was on hols.they were there 2 weeks(i have moved them back now).they have developed very scabby noses that i have now found out is due to there being st johns wort present in the field.i hope i have caught it in time.i understand that they should be out of sunlight but i cannot put them in because i have ran out of bedding but will be getting some in the week.they are ok in themselves and in a shady part of the field.
does anybody know....
are there lasting results?
how and when do i get rid of this plant?
why didn`t the horses that were there last winter have any problems?(they had eaten the field quite bare by the spring)
should i apply anything to the scabs?

any help and advice please.
thanks

 

[piebaldsparkle]

Don't know re: permenant damage etc...

but do know that St. John's Wort loses 80% of its toxicity when dried, which is probably why the horses which grazed it over winter shown no visible signs of poisoning.

 

[Cahill]

i have a plant in a garden border that i always thought was it and the yellow flowers are nearly 2ins wide,this in the field is much smaller and it didn`t occur to me what it was.
the field was unmanaged before we got it and i need to improve it.

 

[piebaldsparkle]

I work on the principle that if its yellow yank it out!!!!!! I foun a couple of plants in my patch last year, but they haven't come up this year (glad I pull it, even though at the time I didn't have a clue it was St. John's Wort). Hope your boys are O.K. and there is no lasting damage.

 

[help1]

Cahill - don't know about the st johns wort but if it makes them photo sensitive what about putting very high factor sunblock on thier noses or any other light coloured bits - would use the baby stuff as less likely to make thier noses more sensitive -but not sure if you should use it if the scabs are weeping.

 

[Cahill]

the scabs look very dry at the moment with some cracks in and it is not sunny.they look like they may drop off in a few days.
have seen some much worse pics just now so i think i have got to it in time.

 

[merlinsquest]

I have pulled something out of the field today that looked like ragwort but finer..... is that the stuff???

Also found a lonely little ragwort plant..... bastard!!!!

 

[Cahill]

sounds like it,here`s a pic i have found,it`s not as tall as ragwort.

http://www.dereila.ca/na_nature/St%20Johns%20Wort.jpg

 

[merlinsquest]

Thats the beastie.... I pulled it up just incase

 

[Cuffey]

Sudocreme is very good and quite cheap, stays on and will give protection on a sunny day
It wouldnt hurt and could help to give something like Global herbs Restore to counteract any damage to liver